1
Features
• Low Voltage and Standard Voltage Operation
– 5.0 (V
CC
= 4.5V to 5.5V)
– 2.7 (V
CC
= 2.7V to 5.5V)
– 2.5 (V
CC
= 2.5V to 5.5V)
– 1.8 (V
CC
= 1.8V to 5.5V)
• User Selectable Internal Organization
– 1K: 128 x 8 or 64 x 16
– 2K: 256 x 8 or 128 x 16
– 4K: 512 x 8 or 256 x 16
• 3-Wire Serial Interface
• 2 MHz Clock Rate (5V) Compatibility
• Self-Timed Write Cycle (10 ms max)
• High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
– ESD Protection: >4000V
• Automotive Grade and Extended Temperature Devices Available
• 8-Pin PDIP, 8-Pin JEDEC and EIAJ SOIC, and 8-Pin TSSOP Packages
Description
The AT93C46/56/57/66 provides 1024/2048/4096 bits of serial electrically erasable
programmable read only memory (EEPROM) organized as 64/128/256 words of 16
bits each, when the ORG Pin is connected to V
CC
and 128/256/512 words of 8 bits
each when it is tied to ground. The device is optimized for use in many industrial and
commercial applications where low power and low voltage operations are essential.
The AT93C46/56/57/66 is available in space saving 8-pin PDIP and 8-pin JEDEC and
EIAJ SOIC packages.
3-Wire Serial
EEPROMs
1K (128 x 8 or 64 x 16)
2K (256 x 8 or 128 x 16)
4K (512 x 8 or 256 x 16)
AT93C46
AT93C56
AT93C57
AT93C66
Rev. 0172K–07/98
3-Wire, 1K
Serial E
2
PROM
Pin Configurations
Pin Name Function
CS Chip Select
SK Serial Data Clock
DI Serial Data Input
DO Serial Data Output
GND Ground
V
CC
Power Supply
ORG Internal Organization
DC Don’t Connect
8-Pin PDIP
1
2
3
4
8
7
6
5
CS
SK
DI
DO
VCC
DC
ORG
GND
8-Pin SOIC
Rotated (R)
(1K JEDEC Only)
1
2
3
4
8
7
6
5
DC
VCC
CS
SK
ORG
GND
DO
DI
8-Pin SOIC
1
2
3
4
8
7
6
5
CS
SK
DI
DO
VCC
DC
ORG
GND
(continued)
8-Pin TSSOP
1
2
3
4
8
7
6
5
CS
SK
DI
DO
VCC
DC
ORG
GND