AT24C32D Datasheet PDF - ATMEL

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AT24C32D
ATMEL

Part Number AT24C32D
Description I2C-Compatible (2-Wire) Serial EEPROM
Page 24 Pages


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AT24C32D
I2C-Compatible (2-Wire) Serial EEPROM
32-Kbit (4,096 x 8)
DATASHEET
Features
Low-voltage and Standard-voltage Operation
̶ VCC = 1.7V to 5.5V
Internally Organized as 4,096 x 8 (32K)
I2C-compatible (2-Wire) Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
400kHz (1.7V) and 1MHz (2.5V, 2.7V, 5.0V) Compatibility
Write Protect Pin for Hardware Protection
32-byte Page Write Mode
̶ Partial Page Writes Allowed
Self-timed Write cycle (5ms Max)
High Reliability
̶ Endurance: 1,000,000 Write Cycles
̶ Data Retention: 100 Years
Lead-free/Halogen-free devices Available
Green Package Options (Pb/Halide-free/RoHS Compliant)
̶ 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, 8-pad XDFN, 5-lead
SOT23, 5-ball WLCSP, and 8-ball VFBGA packages
Die Sale Options: Wafer Form, Waffle Pack, and Bumped Wafers
Description
The Atmel® AT24C32D provides 32,768 bits of Serial Electrically Erasable and
Programmable Read-Only Memory (EEPROM) organized as 4,096 words of 8 bits
each. The device’s cascading feature allows up to eight devices to share a
common 2-wire bus. The device is optimized for use in many industrial and
commercial applications where low-power and low-voltage operation are
essential. The devices are available in space-saving 8-lead JEDEC SOIC, 8-lead
TSSOP, 8-pad UDFN, 8-pad XDFN, 5-lead SOT23, 5-ball WLCSP, and 8-ball
VFBGA packages. In addition, this device operates from 1.7V to 5.5V.
Atmel-8866C-SEEPROM-AT24C32D-Datasheet_122015



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1. Pin Configurations and Pinouts
Table 1-1. Pin Configuration
Pin
A0
A1
A2
GND
SDA
SCL
WP
VCC
Function
Address Input
Address Input
Address Input
Ground
Serial Data
Serial Clock Input
Write Protect
Device Power Supply
Note:
When using the 5-lead SOT-23 or the
5-ball WLCSP, the software bits A2,
A1, and A0 must be set to Logic 0 to
properly communicate with the device.
A0
A1
A2
GND
8-lead SOIC
18
27
36
45
VCC
WP
SCL
SDA
A0
A1
A2
GND
8-lead TSSOP
18
27
36
45
Top View
VCC
WP
SCL
SDA
8-pad UDFN/XDFN
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
Top View
(1)
5-lead SOT23
SCL
GND
SDA
15
2
34
Top View
WP
VCC
(1)
5-ball WLCSP
8-ball VFBGA
GND SDA
SCL
WP VCC
Ball Side View
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
Bottom View
* Note: Drawings are not to scale
2. Absolute Maximum Ratings*
Operating Temperature . . . . . . . . . . .-55°C to +125°C
Storage Temperature . . . . . . . . . . . -65°C to + 150°C
Voltage on any pin
with respect to ground . . . . . . . . . . . . . . . -1.0 V +7.0V
Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V
DC Output Current . . . . . . . . . . . . . . . . . . . . . . .5.0mA
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent
damage to the device. This is a stress rating
only and functional operation of the device at
these or any other conditions beyond those
indicated in the operational sections of this
specification are not implied. Exposure to
absolute maximum rating conditions for
extended periods may affect device reliability.
2 AT24C32D [DATASHEET]
Atmel-8866C-SEEPROM-AT24C32D-Datasheet_122015



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3. Block Diagram
VCC
GND
WP
SCL
SDA
A2
A1
A0
Start
Stop
Logic
LOAD
Device
Address
Comparator
R/W
Serial
Control
Logic
COMP
LOAD INC
Data Word
Addr/Counter
EN H.V. Pump/Timing
Data Recovery
EEPROM
DIN
DOUT
Y DEC
Serial MUX
DOUT/ACK
LOGIC
4. Pin Descriptions
Serial Clock (SCL): The SCL input is used to positive-edge clock data into each EEPROM device and negative-
edge clock data out of each device.
Serial Data (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open drain driven and may be
wire-ORed with any number of other open-drain or open-collector devices.
Device Addresses (A2, A1, A0): The A2, A1, and A0 pins are device address inputs that are hard wired (directly to
GND or to VCC) for compatibility with other Atmel AT24C devices. When the pins are hard wired, as many as eight
32K devices may be addressed on a single bus system. (Device addressing is discussed in detail in Section 7.,
“Device Addressing” on page 9). A device is selected when a corresponding hardware and software match is true.
If these pins are left floating, the A2, A1, and A0 pins will be internally pulled down to GND. However, due to
capacitive coupling that may appear during customer applications, Atmel recommends always connecting the
address pins to a known state. When using a pull-up resistor, Atmel recommends using 10kor less.
Write Protect (WP): The Write Protect input, when connected to GND, allows normal write operations. When WP
is connected directly to VCC, all Write operations to the memory are inhibited. If the pin is left floating, the WP pin
will be internally pulled down to GND; however, due to capacitive coupling that may appear during customer
applications, Atmel recommends always connecting the WP pins to a known state. When using a pull-up resistor,
Atmel recommends using 10kor less.
Table 4-1. Write Protect
WP Pin Status
At VCC
At GND
Part of the Array Protected
Full Array
Normal Read/Write Operations
AT24C32D [DATASHEET]
Atmel-8866C-SEEPROM-AT24C32D-Datasheet_122015
3



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5. Memory Organization
AT24C32D, 32K Serial EEPROM: The 32K is internally organized as 128 pages of 32-bytes each. Random
word addressing requires a 12-bit data word address.
5.1 Pin Capacitance
Table 5-1.
Pin Capacitance(1)
Applicable over recommended operating range from: TA = 25°C, f = 1.0MHz, VCC = 5.5V.
Symbol Test Condition
Max
CI/O Input/Output Capacitance (SDA)
CIN Input Capacitance (A0, A1, A2, and SCL)
8
6
Units
pF
pF
Note: 1. This parameter is characterized and is not 100% tested.
Conditions
VI/O = 0V
VIN = 0V
5.2 DC Characteristics
Table 5-2. DC Characteristics
Applicable over recommended operating range from: TAI = -40°C to +85°C, VCC = 1.7V to 5.5V (unless otherwise noted).
Symbol Parameter
Test Condition
Min Typ Max Units
VCC1
ICC1
ICC2
ISB1
ILI
ILO
VIL
VIH
VOL1
VOL2
Supply Voltage
Supply Current
Supply Current
Standby Current
Input Leakage
Current VCC = 5.0V
Output Leakage
Current VCC = 5.0V
Input Low Level(1)
Input High Level((1)
Output Low Level
Output Low Level
VCC = 5.0V
VCC = 5.0V
VCC = 1.7V
VCC = 5.0V
Read at 400kHz
Write at 400kHz
VIN = VCC or VSS
VIN = VCC or VSS
1.7
VOUT = VCC or VSS
VCC = 1.7V
VCC = 3.0V
IOL = 0.15mA
IOL = 2.1mA
-0.6
VCC x 0.7
0.4
2.0
0.10
0.05
5.5
1.0
3.0
1.0
6.0
3.0
3.0
VCC x 0.3
VCC + 0.5
0.2
0.4
V
mA
mA
μA
μA
μA
μA
V
V
V
V
Note: 1. VIL min and VIH max are reference only and are not tested.
4 AT24C32D [DATASHEET]
Atmel-8866C-SEEPROM-AT24C32D-Datasheet_122015



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