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
•
•
•
•
•
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)
•
•
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.
(continued)
Pin Configurations
Pin Name
CS
SK
DI
DO
GND
V
CC
ORG
DC
Function
Chip Select
AT93C46
AT93C56
AT93C57
AT93C66
8-Pin PDIP
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
DC
ORG
GND
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Internal Organization
Don’t Connect
8-Pin SOIC
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
DC
ORG
GND
3-Wire, 1K
Serial E
2
PROM
8-Pin SOIC
Rotated (R)
(1K JEDEC Only)
DC
VCC
CS
SK
1
2
3
4
8
7
6
5
ORG
GND
DO
DI
8-Pin TSSOP
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
DC
ORG
GND
Rev. 0172K–07/98
1
ATMEL [ ATMEL CORPORATION ]
