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FM93C46 Rev. D.1
FM93C46 1024-Bit Serial CMOS EEPROM
(MICROWIRE
TM
Synchronous Bus)
July 2000
© 2000 Fairchild Semiconductor International
FM93C46
1024-Bit Serial CMOS EEPROM
(MICROWIRE™ Synchronous Bus)
General Description
FM93C46 is a 1024-bit CMOS non-volatile EEPROM organized
as 64 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 FM93C46 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 FM93C46 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
■ Wide V
CC
2.7V - 5.5V
■ Typical active current of 200µA
10µA standby current typical
1µA standby current typical (L)
0.1µA standby current typical (LZ)
■ No Erase instruction required before Write instruction
■ Self timed write cycle
■ Device status during programming cycles
■ 40 year data retention
■ Endurance: 1,000,000 data changes
■ 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
