CAT93C56, CAT93C57
2-Kb Microwire Serial CMOS EEPROM
FEATURES
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 VCC) 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.
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
For Ordering Information details, see page 16.
RoHS-compliant 8-pin PDIP, SOIC, TSSOP and
8-pad TDFN packages
FUNCTIONAL SYMBOL
PIN CONFIGURATION
PDIP (L)
SOIC (V, X)
TSSOP (Y)
VCC
TDFN (VP2, ZD4*)
SOIC (W*)
ORG
CS
SK
DI
1
2
3
4
8
7
6
5
VCC
NC
VCC
CS
SK
1
2
3
4
8
7
6
5
ORG
GND
DO
CS
SK
DI
DO
CAT93C56
CAT93C57
NC
ORG
GND
DO
DI
* 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
Function
Chip Select
SK
Clock Input
DI
Serial Data Input
Serial Data Output
Power Supply
Ground
DO
VCC
GND
ORG
NC
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
Memory Organization
No Connection
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-1088 Rev. P