E
CAT93C46/56/57/66/86
1K/2K/2K/4K/16K-Bit Microwire Serial EEPROM
TM
FEATURES
ꢀ High speed operation:
ꢀ Power-up inadvertant write protection
ꢀ 1,000,000 Program/erase cycles
ꢀ 100 year data retention
– 93C56/57/66: 1MHz
– 93C46/86: 3MHz
ꢀ Low power CMOS technology
ꢀ Commercial, industrial and automotive
ꢀ 1.8 to 6.0 volt operation
temperature ranges
ꢀ Selectable x8 or x16 memory organization
ꢀ Self-timed write cycle with auto-clear
ꢀ Hardware and software write protection
ꢀ Sequential read (except CAT93C46)
ꢀꢀꢀProgram enable (PE) pin (CAT93C86 only)
ꢀꢀꢀ“Green” package option available
DESCRIPTION
CMOS EEPROM floating gate technology. The devices
aredesignedtoendure1,000,000program/erasecycles
and have a data retention of 100 years. The devices are
available in 8-pin DIP, 8-pin SOIC or 8-pin TSSOP
packages.
The CAT93C46/56/57/66/86 are 1K/2K/2K/4K/16K-bit
Serial EEPROM memory devices which are configured
as either registers of 16 bits (ORG pin at VCC) or 8 bits
(ORGpinatGND). Eachregistercanbewritten(orread)
serially by using the DI (or DO) pin. The CAT93C46/56/
57/66/86 are manufactured using Catalyst’s advanced
PIN CONFIGURATION
TSSOP Package (U,Y)
SOIC Package (J,W) SOIC Package (S,V)
DIP Package (P, L)
SOIC Package (K,X)
1
2
3
4
8
7
6
5
CS
SK
DI
V
CC
NC (PE*)
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
CS
SK
DI
V
ORG
GND
DO
CS
SK
DI
V
CS
SK
DI
V
CC
NC (PE*)
CC
CC
NC (PE*)
V
NC (PE*)
ORG
NC (PE*)
ORG
CC
ORG
ORG
CS
DO
DO
GND
SK
DI
DO
GND
DO
GND
GND
*Only For 93C86
93C46/56/57/66/86
F01
PIN FUNCTIONS
BLOCK DIAGRAM
Pin Name
CS
Function
V
GND
CC
Chip Select
SK
Clock Input
ADDRESS
DECODER
DI
Serial Data Input
Serial Data Output
MEMORY ARRAY
ORGANIZATION
ORG
DO
VCC
GND
ORG
NC
+1.8 to 6.0V Power Supply
Ground
DATA
REGISTER
OUTPUT
BUFFER
Memory Organization
No Connection
DI
MODE DECODE
LOGIC
CS
PE*
PE*
Program Enable
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.
CLOCK
GENERATOR
DO
SK
93C46/56/57/66/86 F02
© 2002 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
Doc. No. 1023, Rev. E