AT93C66B Datasheet PDF - ATMEL

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AT93C66B
ATMEL

Part Number AT93C66B
Description (AT93C56B / AT93C66B) Three-wire Serial Electrically Erasable Programmable Read-only Memory
Page 21 Pages


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Features
Low-voltage and standard-voltage operation
– VCC = 1.7V to 5.5V
User-selectable internal organization
– 2K: 256 x 8 or 128 x 16
– 4K: 512 x 8 or 256 x 16
Three-wire serial interface
Sequential read operation
2MHz clock rate (5V)
Self-timed write cycle (5ms max)
High reliability
– Endurance: One million write cycles
– Data retention: 100 years
8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead UDFN, 8-lead XDFN, and 8-ball VFBGA
packages
Description
The Atmel® AT93C56B/66B provides 2048/4096 bits of serial electrically erasable pro-
grammable read-only memory (EEPROM) organized as 128/256 words of 16 bits each
(when the ORG pin is connected to VCC) and 256/512 words of 8 bits each (when the
ORG pin is tied to ground). The device is optimized for use in many industrial and commer-
cial applications where low-power and low-voltage operations are essential. The
AT93C56B/66B is available in space-saving 8-lead JEDEC SOIC, 8-lead TSSOP, 8-lead
UDFN, 8-lead XDFN, and 8-ball VFBGA packages.
The AT93C56B/66B is enabled through the chip select pin (CS) and accessed via a
three-wire serial interface consisting of data input (DI), data output (DO), and shift clock
(SK). Upon receiving a read instruction at DI, the address is decoded and the data is clocked
out serially on the data output pin, DO. The write cycle is completely self-timed, and no sep-
arate erase cycle is required before write. The write cycle is only enabled when the part is in
the erase/write enable state. When CS is brought high following the initiation of a write
cycle, the DO pin outputs the ready/busy status of the part.
The AT93C56B/66B operates from 1.7V to 5.5V.
8-lead SOIC
8-lead TSSOP
Figure 0-1. Pin Configurations
Pin Name
CS
Function
Chip Select
CS 1
SK 2
DI 3
DO 4
CS 1
8 VCC
SK 2
7 NC
DI 3
6 ORG
DO 4
5 GND
8 VCC
7 NC
6 ORG
5 GND
SK Serial Data Clock
8-lead UDFN
8-lead XDFN
DI
DO
GND
VCC
ORG
NC
Serial Data Input
Serial Data Output
Ground
Power Supply
Internal Organization
No Connect
VCC 8
NC 7
ORG 6
GND 5
1 CS
2 SK
3 DI
4 DO
VCC 8
NC 7
ORG 6
GND 5
1 CS
2 SK
3 DI
4 DO
Bottom view
8-ball VFBGA
Bottom view
VCC
NC
ORG
GND
8
7
6
5
1 CS
2 SK
3 DI
4 DO
Bottom view
Three-wire
Serial Electrically
Erasable
Programmable
Read-only Memory
2K (256 x 8 or 128 x 16)
4K (512 x 8 or 256 x 16)
Atmel AT93C56B
Atmel AT93C66B
8735A–SEEPR–1/11
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1. Absolute Maximum Ratings*
Operating Temperature55C to +125C
Storage Temperature 65C to +150C
Voltage on Any Pin
with Respect to Ground  1.0V to +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 is not implied. Exposure to absolute
maximum rating conditions for extended periods may
affect device reliability.
Figure 1-1.
Block Diagram
VCC
GND
ORG
MEMORY ARRAY
256/512 x 8
or
128/256 x 16
ADDRESS
DECODER
DATA
REGISTER
DI
MODE
DECODE
CS LOGIC
OUTPUT
BUFFER
SK CLOCK
GENERATOR
DO
Note:
When the ORG pin is connected to VCC, the x 16 organization is selected. When it is connected to ground, the x 8 organization
is selected. If the ORG pin is left unconnected and the application does not load the input beyond the capability of the internal
1Mpull-up resistor, then the x 16 organization is selected.
2 Atmel AT93C56B/66B
8735A–SEEPR–1/11
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Atmel AT93C56B/66B
Table 1-1. Pin Capacitance(1)
Applicable over recommended operating range from TA = 25C, f = 1.0MHz, VCC = +5.0V (unless otherwise noted)
Symbol
Test Conditions
Max
Units
Conditions
COUT
CIN
Notes:
Output Capacitance (DO)
Input Capacitance (CS, SK, DI)
1. This parameter is characterized, and is not 100% tested
5 pF VOUT = 0V
5 pF VIN = 0V
Table 1-2. 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 Unit
VCC1 Supply Voltage
VCC2 Supply Voltage
VCC3 Supply Voltage
ICC
Supply Current
VCC = 5.0V
1.7 5.5 V
2.5 5.5 V
4.5 5.5 V
READ at 1.0MHz
0.5 2.0 mA
WRITE at 1.0MHz
0.5 2.0 mA
ISB1
Standby Current
VCC = 1.7V
CS = 0V
ISB2
Standby Current
VCC = 2.5V
CS = 0V
ISB3
Standby Current
VCC = 5.0V
CS = 0V
IIL
Input Leakage
VIN = 0V to VCC
IOL
VIL1(1)
VIH1(1)
Output Leakage
Input Low Voltage
Input High Voltage
VIN = 0V to VCC
2.5V VCC 5.5V
VIL2(1)
VIH2(1)
Input Low Voltage
Input High Voltage
1.7V VCC 2.5V
VOL1
VOH1
Output Low Voltage
Output High Voltage
2.5V VCC 5.5V
IOL = 2.1mA
IOH = 0.4mA
VOL2
VOH2
Output Low Voltage
Output High Voltage
1.7V VCC 2.5V
IOL = 0.15mA
IOH = 100µA
Notes: 1. VIL min and VIH max are reference only, and are not tested
0.4 1.0
6.0 10.0
10.0 15.0
0.1 3.0
0.1 3.0
0.6 0.8
2.0 VCC + 1
0.6
VCC x 0.7
VCC x 0.3
VCC + 1
0.4
2.4
0.2
VCC 0.2
µA
µA
µA
µA
µA
V
V
V
V
V
V
8735A–SEEPR–1/11
3
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Table 1-3. AC Characteristics
Applicable over recommended operating range from TAI = 40°C to + 85°C, VCC = as specified, CL = 1 TTL gate and 100pF
(unless otherwise noted)
Symbol
fSK
Parameter
SK Clock Frequency
tSKH SK High Time
tSKL SK Low Time
tCS Minimum CS Low Time
tCSS CS Setup Time
tDIS DI Setup Time
tCSH CS Hold Time
tDIH DI Hold Time
tPD1 Output Delay to 1
tPD0 Output Delay to 0
tSV CS to Status Valid
CS to DO in
tDF High Impedance
tWP Write Cycle Time
Endurance(1) 5.0V, 25°C
Test Condition
4.5V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
Relative to SK
Relative to SK
Relative to SK
Relative to SK
AC Test
AC Test
AC Test
AC Test
CS = VIL
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
2.5V VCC  5.5V
1.7V VCC  5.5V
1.7V VCC  5.5V
Notes: 1. This parameter is characterized, and is not 100% tested
Min
0
0
0
250
1000
250
1000
250
1000
50
200
100
400
0
100
400
1,000,000
Typ
Max Units
2
1 MHz
0.25
ns
ns
ns
ns
250
1000
250
1000
250
1000
150
400
5
ns
ns
ns
ns
ns
ns
ns
ms
Write
Cycles
4 Atmel AT93C56B/66B
8735A–SEEPR–1/11
Free Datasheet http://www.datasheet4u.com/



AT93C66B datasheet pdf
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