MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
2-Wire High-Accuracy Temperature Sensor
Features
• Temperature-to-Digital Converter
• Accuracy with 12-bit Resolution:
- ±0.5°C (typ.) at +25°C
- ±1°C (max.) from -10°C to +85°C
- ±2°C (max.) from -10°C to +125°C
- ±3°C (max.) from -55°C to +125°C
• User-selectable Resolution: 9 – 12 bit
• Operating Voltage Range: 2.7V to 5.5V
• 2-wire Interface: I2C™/SMBus Compatible
• Operating Current: 200 µA (typ.)
• Shutdown Current: 1 µA (max.)
• Power-saving One-shot Temperature
Measurement
• Available Packages: SOT-23-5, MSOP-8, SOIC-8
Typical Applications
• Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
• Office Equipment
• Data Communication Equipment
• Mobile Phones
• General-purpose Temperature Monitoring
Typical Application
VDD
MCP9800/02 R
VDD 1
GND 2
ALERT 3
5 SDA
4 SCLK
RPULL-UP
PICmicro®
Microcontroller
PIC16F737
I/O Port
Description
Microchip Technology Inc.’s MCP9800/1/2/3 family of
digital temperature sensors converts temperatures
between -55°C and +125°C to a digital word. They
provide an accuracy of ±1°C (max.) from -10°C to
+85°C.
The MCP9800/1/2/3 family comes with user-program-
mable registers that provide flexibility for temperature
sensing applications. The register settings allow user-
selectable 9-bit to 12-bit temperature measurement
resolution, configuration of the power-saving Shutdown
and One-shot (single conversion on command while in
the Shutdown) modes and the specification of both
temperature alert output and hysteresis limits. When
the temperature changes beyond the specified limits,
the MCP9800/1/2/3 outputs an alert signal. The user
has the option of setting the alert output signal polarity
as an active-low or active-high comparator output for
thermostat operation, or as temperature event interrupt
output for microprocessor-based systems.
This sensor has an industry standard 2-wire, I2C™/
SMBus compatible serial interface, allowing up to eight
devices to be controlled in a single serial bus. These fea-
tures make the MCP9800/1/2/3 ideal for sophisticated
multi-zone temperature-monitoring applications.
Package Types
MCP9800
MCP9802
MCP9801
MCP9803
SOT-23-5
VDD 1
5 SDA
GND 2
ALERT 3
4 SCLK
SOIC, MSOP
SDA 1
SCLK 2
8 VDD
7 A0
ALERT 3
GND 4
6 A1
5 A2
MCP9800/02A0: A2, A1, A0 are internally set to (0, 0, 0)
MCP9800/02A5: A2, A1, A0 are internally set to (1, 0, 1)
MCP9802/03: Serial Bus time-out 35 ms (typ.)
2004 Microchip Technology Inc.
DS21909B-page 1


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
1.0 ELECTRICAL
CHARACTERISTICS
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PIN FUNCTION TABLE
NAME
FUNCTION
Absolute Maximum Ratings †
VDD....................................................................... 6.0V
Voltage at all Input/Output pins .... GND – 0.3V to 5.5V
Storage temperature ..........................-65°C to +150°C
Ambient temp. with power applied .....-55°C to +125°C
Junction Temperature (TJ).................................. 150°C
ESD protection on all pins (HBM:MM)....... (4 kV:400V)
Latch-Up Current at each pin ........................ ±200 mA
SDA
SCLK
ALERT
A2
A1
A0
VDD
GND
Bidirectional Serial Data (open-drain
output)
Serial Clock Input
Temperature Alert Output (open-drain)
Address Select Pin (bit 2)
Address Select Pin (bit 1)
Address Select Pin (bit 0)
Power Supply Input
Ground
†Notice: Stresses above those listed under “Maximum
ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, and
TA = -55°C to +125°C.
Parameters
Sym Min Typ Max Unit
Conditions
Power Supply
Operating Voltage Range
Operating Current
Shutdown Current
VDD 2.7 — 5.5 V
IDD
200 400
µA Continuous Operation
ISHDN
0.1
1
µA Shutdown Mode
Power On Reset Threshold (POR) VPOR
1.7
V VDD falling edge
Temperature Sensor Accuracy
Accuracy with 12-bit Resolution:
TA = +25°C
-10°C < TA +85°C
-10°C < TA +125°C
-55°C < TA +125°C
Internal Σ∆ ADC
TACY
TACY
TACY
TACY
— ±0.5 —
-1.0 — +1.0
-2.0 — +2.0
-3.0 — +3.0
°C VDD = 3.3V
°C VDD = 3.3V
°C VDD = 3.3V
°C VDD = 3.3V
Conversion Time:
9-bit Resolution
10-bit Resolution
11-bit Resolution
12-bit Resolution
Alert Output (Open-drain)
tCONV
30
75 ms 33 samples/sec (typ.)
tCONV
60 150 ms 17 samples/sec (typ.)
tCONV — 120 300 ms 8 samples/sec (typ.)
tCONV — 240 600 ms 4 samples/sec (typ.)
High-level Current
IOH — — 1 µA VOH = 5V
Low-level Voltage
VOL — — 0.4 V IOL= 3 mA
Thermal Response
Response Time
tRES — 1.4 —
s Time to 63% (88°C)
27°C (Air) to 125°C (oil bath)
DS21909B-page 2
2004 Microchip Technology Inc.


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(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
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DIGITAL INPUT/OUTPUT PIN CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground and
TA = -55°C to +125°C.
Parameters
Sym
Min Typ Max Units
Conditions
Serial Input/Output (SCLK, SDA, A0, A1, A2)
Input
High-level Voltage
Low-level Voltage
Input Current
Output (SDA)
VIH 0.7 VDD
V
VIL — — 0.3 VDD V
IIN -1 — +1 µA
Low-level Voltage
High-level Current
Low-level Current
Capacitance
SDA and SCLK Inputs
VOL
— 0.4
V IOL= 3 mA
IOH — — 1 µA VOH = 5V
IOL 6 — — mA VOL = 0.6V
CIN — 10 — pF
Hysteresis
VHYST 0.05 VDD
V
Graphical Symbol Description
Voltage
INPUT
VDD
VIH
Current
time
VIL
IIN
time
Voltage
VDD
VOL
Current
IOL
IOH
OUTPUT
time
time
TEMPERATURE CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = +2.7V to +5.5V, GND = Ground.
Parameters
Sym Min Typ Max Units
Conditions
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
TA -55 — +125 °C (Note 1)
TA -55 — +125 °C
TA -65 — +150 °C
Thermal Resistance, 5L-SOT23
θJA — 256 — °C/W
Thermal Resistance, 8L-SOIC
θJA — 163 — °C/W
Thermal Resistance, 8L-MSOP
θJA — 206 — °C/W
Note 1: Operation in this range must not cause TJ to exceed Maximum Junction Temperature (+150°C).
2004 Microchip Technology Inc.
DS21909B-page 3


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MCP9800/1/2/3
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SERIAL INTERFACE TIMING SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, -55°C < TA < +125°C,
CL = 80 pF, and all limits measured to 50% point.
Parameters
Sym
Min Typ Max Units
Conditions
2-Wire I2C/SMBus Compatible Interface
Serial Port Frequency
fSC 0 — 400 kHz I2C MCP9800/01
fSC 10 — 400 kHz SMBus MCP9802/03
Clock Period
tSC 2.5 — — µs
Low Clock
tLOW
1.3 —
— µs
High Clock
tHIGH
0.6 —
— µs
Rise Time
tR 20 — 300 ns 10% to 90% of VDD (SCLK, SDA)
Fall Time
tF 20 — 300 ns 90% to 10% of VDD (SCLK, SDA)
Data Setup Before SCLK High tSU-DATA 0.1
— µs
Data Hold After SCLK Low
tH-DATA
0
— 0.9 µs
Start Condition Setup Time
tSU-START 0.6
— µs
Start Condition Hold Time
tH-START
0.6
— µs
Stop Condition Setup Time
tSU-STOP 0.6
— µs
Bus Idle
tIDLE
1.3 —
— µs
Time Out
tOUT
25 35 50 ms MCP9802/03 only
Timing Diagram
START Condition
tSU-START tH-START
SCLK
SDA
Data Transmission
SCLK
tHIGH
tOUT
tLOW
SDA
STOP Condition
SCLK
tSU-DATA
SDA
DS21909B-page 4
tH-DATA
tR,tF
tSC
tSU-STOP
tIDLE
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(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise noted: VDD = 2.7V to 5.5V.
MCP9800/1/2/3
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3.0
12-Bit Resolution
VDD= 3.3V
2.0 160 Samples
1.0
0.0
-1.0
-2.0
-3.0
-55 -35 -15
Spec. Limits
5 25 45 65
TA (°C)
85 105 125
FIGURE 2-1:
Average Temperature
Accuracy vs. Ambient Temperature, VDD = 3.3V.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
TA = +25°C
VDD = 3.3V
5 lots
32 Samples/lot
160 Samples
Temperature Accuracy (°C)
FIGURE 2-4:
Temperature Accuracy
Histogram, TA = +25°C.
3.0
2.0 VDD = 2.7V
VDD = 3.3V
1.0 VDD = 5.0V
VDD = 5.5V
0.0
12-Bit Resolution
160 Samples
-1.0
-2.0
-3.0
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
FIGURE 2-2:
Average Temperature
Accuracy vs. Ambient Temperature.
400
350
300
250
VDD = 2.7V
VDD = 3.3V
VDD = 5.0V
VDD = 5.5V
200
150
100
50
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
FIGURE 2-5:
Temperature.
Supply Current vs. Ambient
3.0
Resolution
2.0
11-Bit
1.0 12-Bit
0.0
VDD = 3.3V
160 Samples
-1.0
-2.0
9-Bit
10-Bit
-3.0
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
FIGURE 2-3:
Average Temperature
Accuracy vs. Ambient Temperature, VDD = 3.3V.
1
0.8
0.6
0.4
0.2
0
-55 -35 -15 5 25 45 65 85 105 125
TA (°C )
FIGURE 2-6:
Shutdown Current vs.
Ambient Temperature.
2004 Microchip Technology Inc.
DS21909B-page 5


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(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
Note: Unless otherwise noted: VDD = 2.7V to 5.5V.
48
VOL = 0.6V
42
36
30
VDD = 5.5V
VDD = 3.3V
VDD = 2.7V
24
18
12
6
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
FIGURE 2-7:
ALERT and SDA IOL vs.
Ambient Temperature.
0.4
IOL = 3mA
0.3
0.2
VDD = 5.5V
VDD = 3.3V
VDD = 2.7V
0.1
0
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
FIGURE 2-8:
ALERT and SDA Output
VOL vs. Ambient Temperature.
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145
Average of 10 samples per package
125
105
85
65 SOIC
45 MSOP
25 SOT-23
27°C (Air) to 125°C (Oil bath)
5
-2 0 2 4 6 8 10 12 14 16 18 20
Time (s)
FIGURE 2-9:
MCP980X Thermal
Response vs Time.
DS21909B-page 6
2004 Microchip Technology Inc.


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(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
MCP9800
MCP9802
SOT-23-5
5
4
3
2
1
MCP9801
MCP9803
MSOP, SOIC
1
2
3
4
5
6
7
8
Symbol
SDA
SCLK
ALERT
GND
A2
A1
A0
VDD
3.1 Serial Data Pin (SDA)
The SDA is a bidirectional input/output pin, used to
serially transmit data to and from the host controller.
This pin requires a pull-up resistor to output data.
3.2 Serial Clock Pin (SCLK)
The SCLK is a clock input pin. All communication and
timing is relative to the signal on this pin. The clock is
generated by the host controller on the bus.
3.3 Power Supply Input (VDD)
The VDD pin is the power pin. The operating voltage, as
specified in the DC electrical specification table, is
applied on this pin.
3.4 Ground (GND)
The GND pin is the system ground pin.
MCP9800/1/2/3
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Function
Bidirectional Serial Data
Serial Clock Input
Temperature Alert Output
Ground
Address Select Pin (bit 2)
Address Select Pin (bit 1)
Address Select Pin (bit 0)
Power Supply Input
3.5 ALERT Output
The MCP9800/1/2/3’s ALERT pin is an open-drain
output pin. The device outputs an alert signal when the
ambient temperature goes beyond the user-
programmed temperature limit.
3.6 Address Pins (A2, A1, A0)
These pins are device or slave address input pins and
are available only with the MCP9801/03. The device
addresses for the MCP9800/02 are factory-set.
The address pins are the Least Significant bits (LSb) of
the device address bits. The Most Significant bits
(MSb) (A6, A5, A4, A3) are factory-set to <1001>. This
is illustrated in Table 3-2.
TABLE 3-2: SLAVE ADDRESS
Device
A6 A5 A4 A3 A2 A1 A0
MCP9800/02A0 1 0 0 1 0 0 0
MCP9800/02A5 1 0 0 1 1 0 1
MCP9801/03 1 0 0 1 X X X
Note: User-selectable address is shown by X.
2004 Microchip Technology Inc.
DS21909B-page 7


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MCP9800/1/2/3
4.0 FUNCTIONAL DESCRIPTION
The MCP9800/1/2/3 family of temperature sensors
consists of a band-gap type temperature sensor, a Σ∆
Analog-to-Digital Converter (ADC), user-programmable
registers and a 2-wire I2C/SMBus protocol compatible
serial interface.
Resolution
One-Shot
Shutdown
Fault Queue
Alert Polarity
Alert Comp/Int
Configuration
Register
Temperature
Register
THYST
Register
TSET
Register
9-Bit
10-Bit
11-Bit
12-Bit
Σ∆ ADC
Band-Gap
Temperature
Sensor
Register
Pointer
I2C™/SMBus
Interface
FIGURE 4-1:
Functional Block Diagram.
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4.1 Temperature Sensor
The MCP9800/1/2/3 uses the difference in the base-
emitter voltage of a transistor while its collector current
is changed from IC1 to IC2. With this method, the VBE
depends only on the ratio of the two currents and the
ambient temperature, as shown in Equation 4-1.
EQUATION 4-1:
VBE
=
k--q--T-
× ln(IC1 IC2)
Where:
T = temperature in kelvin
VBE = change in diode base-emitter
voltage
k = Boltzmann's constant
q = electron charge
IC1 and IC2 = currents with n:1 ratio
4.2 Σ∆ Analog-to-Digital Converter
A sigma-delta analog-to-digital converter is used to
convert VBE to a digital word that corresponds to the
transistor temperature. The converter has an
adjustable resolution from 9-bits (at 30 ms conversion
time) to 12-bits (at 240 ms conversion time). Thus, it
allows the user to make trade-offs between resolution
and conversion time. Refer to Section 4.3.4 “Sensor
Configuration Register (CONFIG)” and
Section 4.3.4.7 “Σ∆ ADC Resolution” for details.
DS21909B-page 8
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4.3 Registers
The MCP9800/1/2/3 family has four registers that are
user-accessible. These registers are specified as the
ambient temperature register, the temperature limit-set
register, the temperature hysteresis register and device
configuration registers.
The ambient temperature register is a read-only
register and is used to access the ambient temperature
data. The data from the ADC is loaded in parallel in the
register. The temperature limit-set and temperature
hysteresis registers are read/write registers that
provide user-programmable temperature limits. If the
ambient temperature drifts beyond the programmed
limits, the MCP9800/1/2/3 outputs an alert signal using
the ALERT pin (refer to Section 4.3.4.3 “ALERT Out-
put Configuration”). The device configuration register
provides access for the user to configure the
MCP9800/1/2/3’s various features. These registers are
described in further detail in the following sections.
REGISTER 4-1:
REGISTER POINTER
U-0 U-0
00
bit 7
U-0
0
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Resolution
One-Shot
Shutdown
Fault Queue
Alert Polarity
Alert Comp/Int
Configuration
Register
Temperature
Register
THYST
Register
TSET
Register
ALERT Output
Control Logic
ALERT
Output
FIGURE 1:
Register Block Diagram.
The registers are accessed by sending register pointer
to the MCP9800/1/2/3 using the serial interface. This is
an 8-bit pointer. However, the two Least Significant bits
(LSb) are used as pointers and all other bits need to be
cleared <0>. This device has additional registers that
are reserved for test and calibration. If these registers
are accessed, the device may not perform according to
the specification. The pointer description is shown
below.
U-0 U-0 U-0 R/W-0 R/W-0
0 0 0 P1 P0
bit 0
bit 7-3
bit 2-0
Unimplemented: Read as ‘0
Pointer bits
00 =
01 =
10 =
11 =
Temperature Register
Configuration Register
Temperature Hysteresis Register
Temperature Limit-set Register
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
2004 Microchip Technology Inc.
DS21909B-page 9


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MCP9800/1/2/3
4.3.1 AMBIENT TEMPERATURE
REGISTER (TA)
The MCP9800/1/2/3 has a 16-bit read-only ambient
temperature register (TA) that contains 9-bit to 12-bit
temperature data. This data is formatted in two’s
complement. The bit assignments, as well as the
corresponding resolution, is shown in the register
assignment below.
The refresh rate of this register depends on the
selected ADC resolution. It takes 30 ms (typ.) for 9-bit
data and 240 ms (typ.) for 12-bit data. Since this
register is double-buffered, the user can read the
register while the MCP9800/1/2/3 performs analog-to-
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digital conversion in the background. The decimal code
to ambient temperature conversion is shown in
Equation 4-2:
EQUATION 4-2:
Where:
TA = Code × 2n
n = -1, -2, -3 and -4 for 9-bit, 10-bit, 11-bit
and 12-bit resolution, respectively
TA = Ambient Temperature (°C)
Code= MCP980X output in decimal
(Table 4-1)
REGISTER 4-2: AMBIENT TEMPERATURE REGISTER (TA)
Upper Half:
R-0
Sign
R-0
26 °C/bit
R-0
25 °C/bit
R-0
24 °C/bit
R-0 R-0
23 °C/bit 22 °C/bit
bit 15
R-0
21 °C/bit
R-0
20 °C/bit
bit 8
Note:
Lower Half:
R-0 R-0 R-0 R-0 R-0 R-0 R-0
2-1 °C/bit 2-2 °C/bit 2-3 °C/bit 2-4 °C/bit
0
0
0
bit 7
R-0
0
bit 0
When the 9-bit, 10-bit or 11-bit resolutions are selected, bit 6, bit 7 or bit 8 will remain clear <0>,
respectively.
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
TABLE 4-1: AMBIENT TEMPERATURE TO CODE CONVERSION
9-Bit
Ambient Temperature
10-Bit
11-Bit
12-Bit
Binary
Code
Hexadecimal Decimal
TA
(°C)
+125°C
0111 1101 0uuu uuuu(1)
0FA
250 +125
+25.4375°C
0001 1001 0uuu uuuu
032
50 +25
+0.5°C
+125°C
0000 0000 1uuu uuuu
0111 1101 00uu uuuu
001
1F4
1 +0.5
500 +125
+25.4375°C
+0.25°C
0001 1001 01uu uuuu
0000 0000 01uu uuuu
065
001
101 +25.25
1 +0.25
+125°C
+25.4375°C
0111 1101 000u uuuu
0001 1001 011u uuuu
3E8
0CB
1000
203
+125
+25.375
+0.125°C
0000 0000 001u uuuu
001
1 +0.125
+125°C
+25.4375°C
0111 1101 0000 uuuu
0001 1001 0111 uuuu
7D0
197
2000
407
+125
+25.4375
+0.0625°C 0000 0000 0001 uuuu
001
1 +0.0625
0°C
0000 0000 0000 uuuu
000
00
–0.0625°C 1111 1111 1111 uuuu(2)
001(3)
-1 -0.0625
–25.4375°C
–55°C
1110 0110 1001 uuuu
1100 1001 0000 uuuu
197
370
-407
-880
-25.4375
-55
Note 1: ‘u’ represents unused bits. The MCP9800/1/2/3 clears <0> the unused bits.
2: This data is in two’s complement format, which indicates ambient temperature below 0°C.
3: Negative temperature magnitude in Hexadecimal. This conversion is done by complimenting each binary bit and
adding 1.
DS21909B-page 10
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MCP9800/1/2/3
4.3.2 TEMPERATURE LIMIT-SET
REGISTER (TSET)
The MCP9800/1/2/3 has a 16-bit read/write Tempera-
ture Limit-Set register (TSET) which contains a 9-bit data
in two’s compliment format. This data represents a
maximum temperature limit. If the ambient temperature
exceeds this specified limit, the MCP9800/1/2/3 asserts
an alert output. (Refer to Section 4.3.4.3 “ALERT Out-
put Configuration”).
This register uses the nine Most Significant bits (MSb)
and all other bits are don’t cares.
The power-up default value of TSET register is 80°C
<0 1010 0000> in binary.
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REGISTER 4-3: TEMPERATURE LIMIT-SET REGISTER (TSET)
Upper Half:
R/W-0
Sign
R/W-0
26 °C/bit
R/W-0
25 °C/bit
R/W-0
24 °C/bit
R/W-0 R/W-0 R/W-0
23 °C/bit 22 °C/bit 21 °C/bit
bit 15
R/W-0
20 °C/bit
bit 8
Lower Half:
R/W-0
R-0
R-0
R-0
R-0 R-0 R-0
R-0
2-1 °C/bit
0
0
0
0 00
0
bit 7 bit 0
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
2004 Microchip Technology Inc.
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MCP9800/1/2/3
4.3.3 TEMPERATURE HYSTERESIS
REGISTER (THYST)
The MCP9800/1/2/3 has a 16-bit read/write tempera-
ture hysteresis register (THYST) that contains a 9-bit
data in two’s compliment format. This register is used
to set a hysteresis for the TSET limit. Therefore, the data
represents a minimum temperature limit. If the ambient
temperature drifts below the specified limit, the
MCP9800/1/2/3 asserts an alert output (refer to
Section 4.3.4.3 “ALERT Output Configuration”).
This register uses the nine Most Significant bits (MSb)
and all other bits are don’t cares.
The power-up default value of THYST register is 75°C
<0 1001 0110> in binary.
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REGISTER 4-4: TEMPERATURE HYSTERESIS REGISTER (THYST)
Upper Half:
R/W-0
Sign
R/W-0
26 °C/bit
R/W-0
25 °C/bit
R/W-0
24 °C/bit
R/W-0 R/W-0 R/W-0
23 °C/bit 22 °C/bit 21 °C/bit
bit 15
R/W-0
20 °C/bit
bit 8
Lower Half:
R/W-0
R-0
R-0
R-0
R-0 R-0 R-0
R-0
2-1 °C/bit
0
0
0
0 00
0
bit 7 bit 0
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
DS21909B-page 12
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MCP9800/1/2/3
4.3.4
SENSOR CONFIGURATION
REGISTER (CONFIG)
The MCP9800/1/2/3 has an 8-bit read/write configura-
tion register (CONFIG) that allows the user to select the
different features. These features include shutdown,
ALERT output select as comparator or interrupt output,
ALERT output polarity, fault queue cycle, temperature
measurement resolution and One-shot mode (single
conversion while in shutdown). These functions are
described in detail in the following sections.
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REGISTER 4-5:
CONFIGURATION REGISTER (CONFIG)
R/W-0 R/W-0 R/W-0 R/W-0
R/W-0
One-Shot
Resolution
Fault Queue
bit 7
R/W-0
ALERT
Polarity
R/W-0
COMP/
INT
R/W-0
Shut-
down
bit 0
bit 7
bit 5-6
bit 3-4
bit 2
bit 1
bit 0
ONE-SHOT bit
1 = Enabled
0 = Disabled (Power-up default)
Σ∆ ADC RESOLUTION bit
00 = 9 bit (Power-up default)
01 = 10 bit
10 = 11 bit
11 = 12 bit
FAULT QUEUE bit
00 = 1 (Power-up default)
01 = 2
10 = 4
11 = 6
ALERT POLARITY bit
1 = Active-High
0 = Active-Low (Power-up default)
COMP/INT bit
1 = Interrupt Mode
0 = Comparator Mode (Power-up default)
SHUTDOWN bit
1 = Enable
0 = Disable (Power-up default)
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
2004 Microchip Technology Inc.
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MCP9800/1/2/3
4.3.4.1 Shutdown Mode
The Shutdown mode disables all power-consuming
activities (including temperature sampling operations)
while leaving the serial interface active. The device
consumes 1 µA (max.) in this mode. It remains in this
mode until the configuration register is updated to
enable continuous conversion or until power is
recycled.
In Shutdown mode, the CONFIG, TA, TSET and THYST
registers can be read or written. However, the serial
bus activity will increase the shutdown current.
4.3.4.2 One-Shot Mode
The MCP9800/1/2/3 can also be used in a One-shot
mode that can be selected using bit 7 of the CONFIG
register. The One-shot mode performs a single temper-
ature measurement and returns to Shutdown mode.
This mode is especially useful for low-power applica-
tions where temperature is measured upon command
from a controller. For example, a 9-bit TA in One-shot
mode consumes 200 µA (typ.) for 30 ms and 0.1 µA
(typ.) during shutdown.
To access this feature, the device needs to initially be
in Shutdown mode. This is done by sending a byte to
the CONFIG register with bit 0 set <1> and bit 7
cleared <0>. Once the device is in Shutdown mode,
CONFIG needs to be written again with bit 0 and bit 7
set <1>. This begins the single conversion cycle of
30 ms for 9-bit data. Once the conversion is
completed, TA is updated and bit 7 of CONFIG
becomes cleared <0> by the MCP9800/1/2/3.
TABLE 4-6: SHUTDOWN AND ONE-SHOT
MODE DESCRIPTION
Operational Mode
One-Shot Shutdown
(Bit 7)
(Bit 0)
Continuous Conversion
0
0
Shutdown
01
Continuous Conversion
(One-shot is ignored)
1
0
One-Shot
11
Note:
The shutdown command <01> needs to
be programmed before sending a one-
shot command <11>.
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4.3.4.3 ALERT Output Configuration
The ALERT output can be configured as either a
comparator output or as Interrupt Output mode using
bit 1 of CONFIG. The polarity can also be specified as
an active-high or active-low, using bit 2 of CONFIG.
The following sections describe each Output mode
and Figure 4-2 shows graphical description.
4.3.4.4 Comparator Mode
In the Comparator mode, the ALERT output is asserted
when TA is greater than TSET. The pin remains active
until TA is lower than THYST. The Comparator mode is
useful for thermostat-type applications such as turning
on a cooling fan or triggering a system shutdown when
the temperature exceeds a safe operating range.
In the Comparator mode, if the device enters the
Shutdown mode with asserted ALERT output, the
output remains active during shutdown. The device
must be operating in continuous conversion, with TA
below THYST, for the ALERT output to be deasserted.
4.3.4.5 Interrupt Mode
In the Interrupt mode, the ALERT output is asserted
when TA is greater than TSET. However, the output is
deasserted when the user performs a read from any
register. This mode is designed for interrupt driven micro-
controller based systems. The microcontroller receiving
the interrupt will have to acknowledge the interrupt by
reading any register from the MCP9800/1/2/3. This will
clear the interrupt and the ALERT pin will become
deasserted. When TA drifts below THYST, the MCP9800/
1/2/3 outputs another interrupt and the controller needs
to read a register to deassert the ALERT output. Shutting
down the device will also reset or deassert the ALERT
output.
TSET
TA
THYST
ALERT
Comparator Mode
Active-Low
ALERT
Interrupt Mode
Active-Low
FIGURE 4-2:
Alert Output.
DS21909B-page 14
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4.3.4.6 Fault Queue
The fault queue feature can be used as a filter to lessen
the probability of spurious activation of the ALERT pin.
TA must remain above TSET for the consecutive num-
ber of conversion cycles selected using the Fault
Queue bits. Bit 3 and bit 4 of CONFIG can be used to
select up to six fault queue cycles. For example, if six
fault queues are selected, TA must be greater than
TSET for six consecutive conversions before ALERT is
asserted as a comparator or an interrupt output.
This queue setting also applies for THYST. TA must
remain below THYST for six consecutive conversions
before ALERT is deasserted (comparator mode) or
before another interrupt is asserted (interrupt mode).
4.3.4.7 Σ∆ ADC Resolution
The MCP9800/1/2/3 provides access to select the ADC
resolution from 9-bit to 12-bit using bit 6 and bit 5 of the
CONFIG register. The user can gain better insight into
the trends and characteristics of the ambient
temperature by using a finer resolution. Increasing the
resolution also reduces the quantization error.
Figure 2-4 shows accuracy versus resolution.
Table 4-1 shows the TA register conversion time for the
corresponding resolution.
TABLE 4-1:
Bits
9
10
11
12
RESOLUTION AND
CONVERSION TIME
Resolution
°C/Bit (typ.)
0.5
0.25
0.125
0.0625
Conversion time
tCONV ms (typ.)
30
60
120
240
MCP9800/1/2/3
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4.4 Summary of Power-up Default
The MCP9800/1/2/3 has an internal Power-on Reset
(POR) circuit. If the power supply voltage VDD glitches
down to the 1.7V (typ.) threshold, the device resets the
registers to the power-up default settings.
Table 4-2 shows the power-up default summary.
TABLE 4-2:
Register
TA
TSET
THYST
Pointer
CONFIG
POWER-UP DEFAULTS
Data
(Hex)
Power-up Defaults
0000
A000
9600
00
00
0°C
80°C
75°C
Temperature register
Continuous Conversion
Comparator mode
Active-Low Output
Fault Queue 1
9-bit Resolution
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MCP9800/1/2/3
5.0 SERIAL COMMUNICATION
5.1 2-Wire I2C/SMBus Compatible
Interface
The MCP9800/1/2/3 serial clock input (SCLK) and the
bidirectional serial data line (SDA) form a 2-Wire
bidirectional serial port for communication.
The following bus protocol has been defined:
TABLE 5-1:
MCP980X SERIAL BUS
CONVENTIONS
Term
Description
Transmitter Device sending data to the bus
Receiver Device receiving data from the bus
Master
The device that controls the serial bus,
typically a microcontroller
Slave
The device addressed by the master,
such as the MCP9800/1/2/3
START
A unique signal from master to initiate
serial interface with a slave
STOP
A unique signal from the master to
terminate serial interface from a slave
Read/Write A read or write to the MCP9800/1/2/3
registers
ACK
A receiver Acknowledges (ACK) the
reception of each byte by polling the
bus
NAK
A receiver Not-Acknowledges (NAK) or
releases the bus to show End-of-Data
(EOD)
Busy
Communication is not possible
because the bus is in use
Not Busy The bus is in the idle state, both SDA
and SCLK remain high
Data Valid
SDA must remain stable before SCLK
becomes high in order for a data bit to
be considered valid. During normal
data transfers, SDA only changes state
while SCLK is low
5.1.1 DATA TRANSFER
Data transfers are initiated by a start condition
(START), followed by a 7-bit device address and a 1-bit
read/write. Acknowledge (ACK) from slave confirms
the reception of each byte. Each access must be
terminated by a stop condition (STOP).
Data transfer may be initiated when the bus is in IDLE.
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5.1.2 MASTER/SLAVE
The bus is controlled by a master device (typically a
microcontroller) that controls the bus access and gener-
ates the start and stop conditions. The MCP9800/1/2/3
is a slave device and does not control other devices in
the bus. Both master and slave devices can operate as
either transmitter or receiver. However, the master
device determines which mode is activated.
5.1.3 START/STOP CONDITION
A high-to-low transition of the SDA line (while SCLK is
high) is the start condition. All data transfers must be
preceded by a start condition from the master. If a start
condition is generated during data transfer, the
MCP9800/1/2/3 resets and accepts the new start
condition.
A low-to-high transition of the SDA line (while SCLK is
high) is the stop condition. All data transfers must be
ended by a stop condition from the master. If a stop
condition is introduced during data transmission, the
MCP9800/1/2/3 releases the bus.
5.1.4 ADDRESS BYTE
Following the start condition, the host must transmit the
address byte to the MCP9800/1/2/3. The 7-bit address
for the MCP9800/02A0 and MCP9800/02A5 is
<1001000> and <1001101> in binary, respectively.
The address for the MCP9802/03 is
<1001,A2,A1,A0> in binary, where the A0, A1 and A2
bits are set externally by connecting the corresponding
pins to VDD <1> or GND <0>. The 7-bit address trans-
mitted in the serial bit stream must match the selected
address for the MCP9800/1/2/3 to respond with an
ACK.
Bit 8 in the address byte is a read/write bit. Setting this
bit to ‘1’ commands a read operation, while ‘0
commands a write operation.
Address Byte
SCLK
123 45 6 78 9
SDA
Start
1 0 0 1 A2 A1 A0
A
C
K
Address
Code
Slave
Address
R/W
MCP9800/1/2/3 Response
FIGURE 5-1:
Device Addressing.
DS21909B-page 16
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5.1.5 DATA VALID
After the start condition, each bit of data in transmission
needs to be settled for time specified by tSU-DATA
before SCLK toggles from low-to-high (refer to the
Serial Interface Timing Specification).
5.1.6 ACKNOWLEDGE (ACK)
Each receiving device, when addressed, is obliged to
generate an acknowledge bit after the reception of
each byte. The master device must generate an extra
clock pulse for ACK to be recognized.
The acknowledging device has to pull down the SDA
line for tSU-DATA before the low-to-high transition of
SCLK from the Master and remains pulled down for
tH-DATA after high-to-low transition of SCLK.
During read, the master must signal an End-of-Data
(EOD) to the slave by not generating an ACK bit once
the last bit has been clocked out of the slave. In this
case, the slave will leave the data line released to
enable the master to generate the stop condition.
MCP9800/1/2/3
5.1.7
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TIME OUT (MCP9802/03)
If the SCLK stays low for time specified by tOUT, the
MCP9802/03 resets the serial interface. This dictates
the minimum clock speed as specified in the SMBus
specification. The I2C bus specification does not limit
clock speed and, therefore, the master can hold the
clock indefinitely to process data (MCP9800/01 only).
2004 Microchip Technology Inc.
DS21909B-page 17


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MCP9800/1/2/3
5.2 Graphical Representation of the
MCP9800/1/2/3 Serial Protocols
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Read 1-byte Data
SCLK
1 2 34 5678
12345678
SDA
S
1
0
0
1
A
2
A
1
A
0
W
A
C
K
0
0
0
0
0
0
P
1
P
A
C
0K
Address Byte
MCP980X
Pointer
MCP980X
SCLK
SDA
1 2 34 5678
12345678
S
1
0
0
1
A
2
A
1
A
0
R
A
C
K
D
7
D
6
D
5
D
4
D
3
DD
21
D
0
N
A
K
P
Read 2-byte Data
Address Byte
MCP980X
SCLK
1 2 34 56 78
12345678
Data
Master
SDA
S
1
0
0
1
A
2
A
1
A
0
W
A
C
K
0
0
0
0
0
0
P
1
P
A
C
0K
Address Byte
MCP980X
Pointer
MCP980X
SCLK
1 2 34 5678
1 23 456 78
12345678
SDA
S
1
0
0
1
A
2
A
1
A
0
R
A
C
D
D
D
D
D
D
D
K 15 14 13 12 11 10 9
D
A
C
8K
DDD
765
DD
43
D
2
D
1
D
0
N
A
K
P
Address Byte
S = START Condition
P = STOP Condition
MCP980X
MSB Data
Master
LSB Data
Master
FIGURE 5-2:
Read 1-byte and 2-byte data from a Register.
DS21909B-page 18
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MCP9800/1/2/3
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Write 1-byte Data
SCLK
1 2 34 5678
12345678
12345678
SDA
S
1
0
0
1
A
2
A
1
A
0
W
A
C
K
0
0
0
0
0
0
P
1
P
0
A
C
K
DDD
765
DD
43
D
2
D
1
D
0
A
C
K
P
Address Byte
MCP980X
Pointer
MCP980X
Data
MCP980X
Write 2-byte Data
SCLK
1 2 34 5678
1 23 4 567 8
SDA
S
1
0
0
1
A
2
A
1
A
0
W
A
C
K
0
0
0
0
0
0
P
1
P
A
C
0K
Address Byte
MCP980X
Pointer
MCP980X
1 23 4 567 8
12345678
S = START Condition
P = STOP Condition
D
D
D
D
D
D
D
D
A
C
15 14 13 12 11 10 9 8 K
DD D D D D D
76 5 4 3 2 1
D
0
A
C
K
P
MSB Data
MCP980X
LSB Data
MCP980X
FIGURE 5-3:
Write 1-byte and 2-byte data from a Register.
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DS21909B-page 19


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Register Pointer Setting for Continuous Reception
SCLK
1 2 34 5678
12345678
SDA
S
1
0
0
1
AA
21
A
0
W
A
C
K
0
0
0
0
0
0
P
1
P
A
C
0K
Address Byte
MCP980X
Pointer
MCP980X
Receive 1-byte Data
SCLK
1 2 34 5678
12345678
SDA
S
1
0
0
1
A
2
A
1
A
0
R
A
C
K
DD
76
D
5
D
4
D
3
D
2
D
1
D
0
N
AP
K
Receive Another 1-byte Data
SCLK
Address Byte
MCP980X
Data
Master
1 2 34 5678
12345678
SDA
S
1
0
0
1
A
2
A
1
A
0
A
RC
K
DDD
765
D
4
D
3
D
2
D
1
D
0
N
A
K
P
Address Byte
MCP980X
Data
Master
Note: User can continue to receive 1-byte data indefinitely from a previously set register pointer.
S = START Condition
P = STOP Condition
FIGURE 5-4:
Receive 1-byte data from previously set pointer.
DS21909B-page 20
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MCP9800/1/2/3
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Register Pointer Setting for Continuous Reception
SCLK
1 2 34 5678
1 23 4 56 78
SDA
S
1
0
0
1
A
2
A
1
A
0
W
A
C
K
0
0
0
0
0
0
P
1
P
A
C
0K
Receive 2-byte Data
Address Byte
MCP980X
Pointer
MCP980X
12 34 5678
12345678
12345678
S
1
0
0
1
A
2
A
1
A
0
R
A
C
K
D
15
DDDD
14 13 12 11
D
10
D
9
D
A
C
8K
DDD
76 5
DD
43
DD
21
D
0
N
A
K
P
Address Byte
MCP980X
MSB Data
Master
LSB Data
Master
Receive Another 2-byte Data
1 2 34 5678
12345678
12345678
S
1
0
0
1
A
2
A
1
A
0
R
A
C
K
D
15
DDDD
14 13 12 11
D
10
D
9
D
A
C
8K
DD D D D
765 43
DD
21
D
0
N
A
K
P
Address Byte
MCP980X
MSB Data
Master
LSB Data
Master
Note: User can continue to receive 2-byte data indefinitely from a previously set register pointer.
S = START Condition
P = STOP Condition
FIGURE 5-5:
Receive 2-byte data from previously set pointer.
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DS21909B-page 21


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MCP9800/1/2/3
6.0 APPLICATIONS INFORMATION
6.1 Connecting to the Serial Bus
The SDA and SCLK serial interface are open-drain pins
that require pull-up resistors. This configuration is
shown in Figure 6-1.
VDD
MCP980X
RR
SDA
SCLK
FIGURE 6-1:
Interface.
Pull-up Resistors On Serial
For the SMBus protocol, the number of devices con-
nected to the bus are limited only by the maximum rise
and fall times of the SDA and SCLK lines. Unlike the
I2C specifications, SMBus does not specify a maximum
bus capacitance value. Rather, it specifies 350 µA
(max.) current through the pull-up resistor. Therefore,
the value of the pull-up resistors will vary depending on
the system’s supply voltage (VDD). The pull-up resistor
values for a 5V system ranges 14.3 kto 50 k.
Minimizing bus capacitance is still very important, as it
directly affects the rise and fall times of the SDA and
SCLK lines.
Although SMBus specifications only require the SDA
and SCLK lines to pull down 350 µA (max.) with 0.4V
(max.) voltage drop, the MCP9800/1/2/3 is designed to
meet 0.4V (max.) voltage drop at 3 mA of current. This
allows the MCP9800/1/2/3 to drive lower values of pull-
up resistors and higher bus capacitance. In this
application, all devices on the bus must meet the same
pull-down current requirements.
6.2 Typical Application
Microchip provides several microcontroller product
lines with Master Synchronous Serial Port Modules
(MSSP) that include I2C interface mode. This module
implements all master and slave functions and simpli-
fies the firmware development overhead. Figure 6-2
shows a typical application using the PIC16F737 as a
master to control other Microchip slave products, such
as EEPROM, fan speed controllers and the MCP980X
temperature sensor connected to the bus.
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SDA SCLK
PIC16F737
Microcontroller
24LC01
EEPROM
TC654
Fan Speed
Controller
MCP980X
Temperature
Sensor
FIGURE 6-2:
Multiple Devices on SMBus.
The ALERT output can be wire-ORed with a number of
other open-drain devices. In such applications, the
output needs to be programmed as an active-low
output. Most systems will require pull-up resistors for
this configuration.
6.3 Layout Considerations
The MCP9800/1/2/3 does not require any additional
components besides the Master controller in order to
measure temperature. However, it is recommended
that a decoupling capacitor of 0.1 µF to 1 µF be used
between the VDD and GND pins. A high-frequency
ceramic capacitor is recommended. It is necessary for
the capacitor to be located as close as possible to the
power pins in order to provide effective noise
protection.
6.4 Thermal Considerations
The MCP9800/1/2/3 measures temperature by
monitoring the voltage of a diode located in the die. A
low impedance thermal path between the die and the
Printed Circuit Board (PCB) is provided by the pins.
Therefore, the MCP9800/1/2/3 effectively monitors the
temperature of the PCB. However, the thermal path for
the ambient air is not as efficient because the plastic
device package functions as a thermal insulator.
A potential for self-heating errors can exist if the
MCP9800/1/2/3 SDA and SCLK communication lines
are heavily loaded with pull-ups. Typically, the self-
heating error is negligible because of the relatively
small current consumption of the MCP9800/1/2/3.
However, in order to maximize the temperature
accuracy, the SDA and SCLK pins need to be lightly
loaded.
DS21909B-page 22
2004 Microchip Technology Inc.


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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7.0 PACKAGING INFORMATION
7.1 Package Marking Information
5-Lead SOT-23
MCP9800/1/2/3
www.DataSheet4U.com
XXNN
Part Number
MCP9800A0T-M/OTG
MCP9800A5T-M/OTG
Example:
MCP9800
Part Number
LDNN
LJNN
MCP9802A0T-M/OTG
MCP9802A5T-M/OTG
MCP9802
JKNN
JRNN
8-Lead MSOP
Example:
XXXXX
YWWNNN
G9803M
425256
8-Lead SOIC (150 mil)
XXXXXXXX
XXXXYYWW
NNN
Example:
GMCP9803
M/SN0425
256
Legend:
XX...X
YY
WW
NNN
Customer specific information*
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line thus limiting the number of available characters
for customer specific information.
* Standard OTP marking consists of Microchip part number, year code, week code, and traceability code.
2004 Microchip Technology Inc.
DS21909B-page 23


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
5-Lead Plastic Small Outline Transistor (OT) (SOT-23)
E
E1
www.DataSheet4U.com
p
B
p1 D
n1
α
c
A A2
Lφ
A1
β
Units
INCHES*
MILLIMETERS
Dimension Limits
MIN
NOM
MAX
MIN
NOM
Number of Pins
Pitch
n5
p .038
5
0.95
Outside lead pitch (basic)
p1
.075
1.90
Overall Height
A .035 .046 .057 0.90 1.18
Molded Package Thickness
A2
.035 .043
.051 0.90
1.10
Standoff
A1 .000 .003 .006 0.00 0.08
Overall Width
E .102 .110 .118 2.60 2.80
Molded Package Width
E1 .059 .064 .069 1.50 1.63
Overall Length
D .110 .116 .122 2.80 2.95
Foot Length
L .014 .018 .022 0.35 0.45
Foot Angle
φ
0
5 10
0
5
Lead Thickness
c .004 .006 .008 0.09 0.15
Lead Width
B .014 .017 .020 0.35 0.43
Mold Draft Angle Top
α
0
5 10
0
5
Mold Draft Angle Bottom
β
0
5 10
0
5
*Controlling Parameter
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not
exceed .005" (0.127mm) per side.
EIAJ Equivalent: SC-74A
Drawing No. C04-091
MAX
1.45
1.30
0.15
3.00
1.75
3.10
0.55
10
0.20
0.50
10
10
DS21909B-page 24
2004 Microchip Technology Inc.


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
8-Lead Plastic Micro Small Outline Package (MS) (MSOP)
www.DataSheet4U.com
E
E1
p
B
n
D
2
1
α
c
(F)
β
A
φ
A1
L
A2
Units
Dimension Limits
Number of Pins
n
Pitch
p
Overall Height
A
Molded Package Thickness
A2
MIN
-
.030
INCHES
NOM
8
.026 BSC
-
.033
MAX
.043
.037
MILLIMETERS*
MIN NOM
8
0.65 BSC
--
0.75
0.85
Standoff
Overall Width
Molded Package Width
Overall Length
A1 .000
- .006 0.00
-
E .193 TYP.
4.90 BSC
E1 .118 BSC
3.00 BSC
D .118 BSC
3.00 BSC
Foot Length
Footprint (Reference)
Foot Angle
Lead Thickness
L
.016
.024
.031 0.40 0.60
F .037 REF
0.95 REF
φ 0° - 8° 0° -
c .003 .006 .009 0.08
-
Lead Width
Mold Draft Angle Top
Mold Draft Angle Bottom
*Controlling Parameter
B .009 .012 .016 0.22
α
- 15°
β
- 15°
-
-
-
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not
exceed .010" (0.254mm) per side.
JEDEC Equivalent: MO-187
Drawing No. C04-111
MAX
1.10
0.95
0.15
0.80
0.23
0.40
15°
15°
2004 Microchip Technology Inc.
DS21909B-page 25


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
8-Lead Plastic Small Outline (SN) – Narrow, 150 mil Body (SOIC)
www.DataSheet4U.com
p
Bn
E
E1
D
2
1
45°
c
β
h
A
φ
L A1
α
A2
Units
Dimension Limits
Number of Pins
n
Pitch
p
Overall Height
A
Molded Package Thickness
A2
Standoff §
A1
Overall Width
E
Molded Package Width
E1
Overall Length
D
Chamfer Distance
h
Foot Length
L
Foot Angle
φ
Lead Thickness
c
Lead Width
B
Mold Draft Angle Top
α
Mold Draft Angle Bottom
β
* Controlling Parameter
§ Significant Characteristic
MIN
.053
.052
.004
.228
.146
.189
.010
.019
0
.008
.013
0
0
INCHES*
NOM
8
.050
.061
.056
.007
.237
.154
.193
.015
.025
4
.009
.017
12
12
MAX
.069
.061
.010
.244
.157
.197
.020
.030
8
.010
.020
15
15
MILLIMETERS
MIN NOM
8
1.27
1.35
1.55
1.32
1.42
0.10
0.18
5.79
6.02
3.71
3.91
4.80
4.90
0.25
0.38
0.48
0.62
04
0.20
0.23
0.33
0.42
0 12
0 12
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed
.010” (0.254mm) per side.
JEDEC Equivalent: MS-012
Drawing No. C04-057
MAX
1.75
1.55
0.25
6.20
3.99
5.00
0.51
0.76
8
0.25
0.51
15
15
DS21909B-page 26
2004 Microchip Technology Inc.


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
PRODUCT IDENTIFICATION SYSTEM
www.DataSheet4U.com
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO. XX
X
–X /XX X
Device Slave Tape & Reel Temperature Package PB Free
Address
Range
Device:
Tape and Reel:
Temperature
Range:
Package:
PB Free:
MCP9800: Temperature Sensor
MCP9801: Temperature Sensor
MCP9802: Temperature Sensor
MCP9803: Temperature Sensor
A0 = Slave address set to ‘000
A5 = Slave address set to ‘101
= Blank
T = Tape and Reel
M = -55°C to +125°C
OT = Plastic Small Outline Transistor (SOT-23), 5-lead
MS = Plastic Micro Small Outline (MSOP), 8-lead
SN = Plastic SOIC, (150 mil Body), 8-lead
G = Lead Free device
Examples:
a) MCP9800A0T-M/OTG Slave address ‘000’,
Tape and Reel,
-55°C to +125°C, PB
Free SOT-23 package.
b) MCP9800A5T-M/OTG Slave address ‘101’,
Tape and Reel,
-55°C to +125°C, PB
Free SOT-23 package.
a) MCP9801-M/MSG -55°C to +125°C, PB
Free 8LD MSOP
package.
b) MCP9801T-M/MSG Tape and Reel, -55°C
to +125°C, PB Free
8LD MSOP package.
c) MCP9801-M/SNG -55°C to +125°C, PB
Free 8LD SOIC
package.
d) MCP9801T-M/SNG Tape and Reel, -55°C
to +125°C, PB Free
8LD SOIC package.
a) MCP9802A0T-M/OT Slave address ‘000’,
Tape and Reel, -55°C
to +125°C, SOT-23
package.
b) MCP9802A5T-M/OT Slave address ‘101’,
Tape and Reel, -55°C
to +125°C, SOT-23
package.
a) MCP9803-M/MSG -55°C to +125°C, PB
Free 8LD MSOP
package.
b) MCP9803T-M/MSG Tape and Reel, -55°C
to +125°C, PB Free
8LD MSOP package.
c) MCP9803-M/SNG -55°C to +125°C, PB
Free 8LD SOIC
package.
d) MCP9803T-M/SNG Tape and Reel, -55°C
to +125°C, PB Free
8LD SOIC package.
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and
recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office
2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
3. The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com) to receive the most current information on our products.
2004 Microchip Technology Inc.
DS21909B-page 27


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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MCP9800/1/2/3
NOTES:
www.DataSheet4U.com
DS21909B-page 28
2004 Microchip Technology Inc.


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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www.DataSheet4U.com
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR WAR-
RANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,
WRITTEN OR ORAL, STATUTORY OR OTHERWISE,
RELATED TO THE INFORMATION, INCLUDING BUT NOT
LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE,
MERCHANTABILITY OR FITNESS FOR PURPOSE.
Microchip disclaims all liability arising from this information and
its use. Use of Microchip’s products as critical components in
life support systems is not authorized except with express
written approval by Microchip. No licenses are conveyed,
implicitly or otherwise, under any Microchip intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro,
PICSTART, PRO MATE, PowerSmart, rfPIC, and
SmartShunt are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
AmpLab, FilterLab, MXDEV, MXLAB, PICMASTER, SEEVAL,
SmartSensor and The Embedded Control Solutions Company
are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Migratable Memory, MPASM,
MPLIB, MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net,
PICLAB, PICtail, PowerCal, PowerInfo, PowerMate,
PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial,
SmartTel and Total Endurance are trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2004, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
2004 Microchip Technology Inc.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS21909B-page 29


MCP9800 (Microchip Technology)
(MCP9800 - MCP9803) 2-Wire High-Accuracy Temperature Sensor

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www.DataSheet4U.com
WORLDWIDE SALES AND SERVICE
AMERICAS
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http:\\support.microchip.com
Web Address:
www.microchip.com
Atlanta
Alpharetta, GA
Tel: 770-640-0034
Fax: 770-640-0307
Boston
Westford, MA
Tel: 978-692-3848
Fax: 978-692-3821
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
San Jose
Mountain View, CA
Tel: 650-215-1444
Fax: 650-961-0286
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
ASIA/PACIFIC
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8676-6200
Fax: 86-28-8676-6599
China - Fuzhou
Tel: 86-591-750-3506
Fax: 86-591-750-3521
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
China - Qingdao
Tel: 86-532-502-7355
Fax: 86-532-502-7205
ASIA/PACIFIC
India - Bangalore
Tel: 91-80-2229-0061
Fax: 91-80-2229-0062
India - New Delhi
Tel: 91-11-5160-8632
Fax: 91-11-5160-8632
Japan - Kanagawa
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Taiwan - Hsinchu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
EUROPE
Austria - Weis
Tel: 43-7242-2244-399
Fax: 43-7242-2244-393
Denmark - Ballerup
Tel: 45-4420-9895
Fax: 45-4420-9910
France - Massy
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Germany - Ismaning
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
England - Berkshire
Tel: 44-118-921-5869
Fax: 44-118-921-5820
DS21909B-page 30
09/27/04
2004 Microchip Technology Inc.




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