E
CAT93C66 (Die Rev. E)
4K-Bit Microwire Serial EEPROM
TM
FEATURES
ꢀ High speed operation: 1MHz
ꢀ Power-up inadvertant write protection
ꢀ 1,000,000 Program/erase cycles
ꢀ 100 year data retention
ꢀ Low power CMOS technology
ꢀ 1.8 to 6.0 volt operation
ꢀ Selectable x8 or x16 memory organization
ꢀ Self-timed write cycle with auto-clear
ꢀ Hardware and software write protection
ꢀ Commercial, industrial and automotive
temperature ranges
ꢀ Sequential read
ꢀ “Green” package option available
DESCRIPTION
Catalyst’sadvancedCMOSEEPROMfloatinggatetech-
nology. The devices are designed to endure 1,000,000
program/erase cycles and has a data retention of 100
years. The devices are available in 8-pin DIP, 8-pin
SOIC, 8-pin TSSOP and 8-pad TDFN packages.
The CAT93C66 is a 4K-bit Serial EEPROM memory
device which isconfigured 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 CAT93C66 is manufactured using
PIN CONFIGURATION
FUNCTIONAL SYMBOL
VCC
SOIC Package (J,W)
DIP Package (P, 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
CS
DI
NC
V
CC
CS
ORG
GND
DO
DO
SK
DI
SK
NC
SOIC Package (S,V)
SOIC Package (K,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
CS
TSSOP Package (U,Y)
SK
1
2
3
4
8
7
6
5
CS
SK
DI
V
CC
DI
Serial Data Input
Serial Data Output
+1.8 to 6.0V Power Supply
Ground
NC
DO
VCC
GND
ORG
NC
ORG
GND
DO
TDFN Package (RD4, ZD4)
Memory Organization
No Connection
V
CC
NC
1
2
3
4
8
7
6
5
CS
SK
DI
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.
ORG
GND
DO
Bottom View
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
Doc. No. 1089, Rev. L