CAT93C56, CAT93C57
2-Kb Microwire Serial CMOS EEPROM
FEATURES
High speed operation: 2MHz
1.8V to 5.5V supply voltage range
Selectable x8 or x16 memory organization
Sequential read
Software write protection
Power-up inadvertant write protection
Low power CMOS technology
1,000,000 Program/erase cycles
100 year data retention
Industrial temperature ranges
RoHS-compliant 8-pin PDIP, SOIC, TSSOP and
8-pad TDFN packages
DESCRIPTION
The CAT93C56/57 is a 2-Kb CMOS Serial EEPROM
device which is organized as either 128 registers of 16
bits (ORG pin at V
CC
) or 256 registers of 8 bits (ORG pin
at GND). Each register can be written (or read) serially
by using the DI (or DO) pin. The CAT93C56/57 features
sequential read and self-timed internal write with auto-
clear. On-chip Power-On Reset circuitry protects the
internal logic against powering up in the wrong state.
PIN CONFIGURATION
PDIP (L)
SOIC (V, X)
TSSOP (Y)
TDFN (VP2, ZD4*)
CS
SK
DI
DO
1
2
3
4
8 V
CC
7 NC
6 ORG
5 GND
NC
V
CC
CS
SK
FUNCTIONAL SYMBOL
V
CC
SOIC (W*)
1
2
3
4
8 ORG
7 GND
6 DO
5 DI
ORG
CS
SK
DI
CAT93C56
CAT93C57
DO
* TDFN 3x3mm (ZD4) and SOIC (W) rotated pin-out packages are
available for CAT93C57 and CAT93C56, Rev. E only (not
recommended for new designs of CAT93C56)
GND
PIN FUNCTION
Pin Name
CS
SK
DI
DO
V
CC
GND
ORG
NC
Function
Chip Select
Clock Input
Serial Data Input
Serial Data Output
Power Supply
Ground
Memory Organization
No Connection
Note: When the ORG pin is connected to VCC, the x16 organization
is selected. When it is connected to ground, the x8 pin is selected. If
the ORG pin is left unconnected, then am internal pullup device will
select the x16 organization
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-1088 Rev. P
CATALYST [ CATALYST SEMICONDUCTOR ]
