E
CAT93C56/57 (Die Rev. E)
2K-Bit Microwire Serial EEPROM
TM
FEATURES
ꢀ High speed operation: 1MHz
ꢀ Low power CMOS technology
ꢀ 1.8 to 5.5 volt operation
ꢀ Sequential read
ꢀ Power-up inadvertant write protection
ꢀ 1,000,000 Program/erase cycles
ꢀ 100 year data retention
ꢀ Selectable x8 or x16 memory organization
ꢀ Self-timed write cycle with auto-clear
ꢀ Software write protection
ꢀ Commercial, industrial and automotive
temperature ranges
ꢀ RoHS-compliant packages
DESCRIPTION
using Catalyst’s advanced CMOS EEPROM floating
gate technology. The devices are designed to endure
1,000,000 program/erase cycles and has a data reten-
tion of 100 years. The devices are available in 8-pin DIP,
SOIC, TSSOP and 8-pad TDFN packages.
The CAT93C56/57 are 2K-bit Serial EEPROM memory
devices which are configured as either registers of 16
bits (ORG pin at VCC) or 8 bits (ORG pin at GND). Each
register can be written (or read) serially by using the
DI (or DO) pin. The CAT93C56/57 are manufactured
PIN CONFIGURATION
FUNCTIONAL SYMBOL
VCC
SOIC Package (W)
DIP Package (L)
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
CS
SK
DI
V
ORG
GND
DO
NC
CC
ORG
NC
V
CC
CS
ORG
GND
CS
SK
DI
DO
DO
SK
DI
SOIC Package (V)
SOIC Package (X)
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
CS
SK
DI
V
CS
SK
DI
V
CC
NC
ORG
GND
CC
GND
NC
ORG
GND
PIN FUNCTIONS
DO
DO
Pin Name
Function
Chip Select
Clock Input
TSSOP Package (Y)
TDFN Package (ZD4)
CS
SK
1
2
3
4
8
7
6
5
CS
SK
DI
V
V
CC
NC
1
2
3
4
8
7
6
5
CS
SK
DI
CC
NC
DI
Serial Data Input
Serial Data Output
Power Supply
ORG
GND
ORG
GND
DO
VCC
GND
ORG
NC
DO
DO
Bottom View
Ground
Memory Organization
No Connection
For Ordering Information details, see page 8.
Note: When the ORG pin is connected to VCC, the x16 organiza-
tion is selected. When it is connected to ground, the x8 pin is
selected. If the ORG pin is left unconnected, then an internal pullup
device will select the x16 organization.
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
Doc. No. 1088, Rev. O