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FM93C66 Rev. C.1
FM93C66 4096-Bit Serial CMOS EEPROM(MICROWIRE
TM
Synchronous Bus)
July 2000
© 2000 Fairchild Semiconductor International
FM93C66
4096-Bit Serial CMOS EEPROM
(MICROWIRE™ Synchronous Bus)
General Description
FM93C66 is a 4096-bit CMOS non-volatile EEPROM organized
as 256 x 16-bit array. This device features MICROWIRE interface
which is a 4-wire serial bus with chipselect (CS), clock (SK), data
input (DI) and data output (DO) signals. This interface is compat-
ible to many of standard Microcontrollers and Microprocessors.
There are 7 instructions implemented on the FM93C66 for various
Read, Write, Erase, and Write Enable/Disable operations. This
device is fabricated using Fairchild Semiconductor floating-gate
CMOS process for high reliability, high endurance and low power
consumption.
“LZ” and “L” versions of FM93C66 offer very low standby current
making them suitable for low power applications. This device is
offered in both SO and TSSOP packages for small space consid-
erations.
Functional Diagram
Features
a73 Wide V
CC
2.7V - 5.5V
a73 Typical active current of 200µA
10µA standby current typical
1µA standby current typical (L)
0.1µA standby current typical (LZ)
a73 No Erase instruction required before Write instruction
a73 Self timed write cycle
a73 Device status during programming cycles
a73 40 year data retention
a73 Endurance: 1,000,000 data changes
a73 Packages available: 8-pin SO, 8-pin DIP, 8-pin TSSOP
INSTRUCTION
DECODER
CONTROL LOGIC
AND CLOCK
GENERATORS
HIGH VOLTAGE
GENERATOR
AND
PROGRAM
TIMER
INSTRUCTION
REGISTER
ADDRESS
REGISTER
EEPROM ARRAY
READ/WRITE AMPS
DATA IN/OUT REGISTER
16 BITS
DECODER
16
16
DATA OUT BUFFER
CS
SK
DI
DO
V
SS
V
CC