M
FEATURES
93C66A/B
PACKAGE TYPE
PDIP
CS
CLK
DI
DO
1
8
V
CC
NC
NC
V
SS
4K 5.0V Automotive Temperature Microwire
庐
Serial EEPROM
鈥?Single supply 5.0V operation
鈥?Low power CMOS technology
- 1 mA active current (typical)
- 1
碌
A standby current (maximum)
鈥?512x 8 bit organization (93C66A)
鈥?256x 16 bit organization (93C66B)
鈥?Self-timed ERASE and WRITE cycles (including
auto-erase)
鈥?Automatic ERAL before WRAL
鈥?Power on/off data protection circuitry
鈥?Industry standard 3-wire serial interface
鈥?Device status signal during ERASE/WRITE
cycles
鈥?Sequential READ function
鈥?100,000 E/W cycles guaranteed
鈥?Data retention > 200 years
鈥?8-pin PDIP and SOIC packages
鈥?Available for the following temperature ranges:
- Automotive (E):
-40
掳
C to +125
掳
C
93C66A/B
2
3
4
7
6
5
SOIC
CS
CLK
DI
DO
1
8
V
CC
NC
NC
V
SS
93C66A/B
2
3
4
7
6
5
BLOCK DIAGRAM
MEMORY
ARRAY
ADDRESS
DECODER
DESCRIPTION
The Microchip Technology Inc. 93C66A/B is a 4K-bit,
low-voltage serial Electrically Erasable PROM. The
device memory is con铿乬ured as 512 x 8 bits (93C66A)
or 256 x 16 bits (93C66B). Advanced CMOS
technology makes this device ideal for low-power,
nonvolatile memory applications. The 93C66A/B is
available in standard 8-pin DIP and surface mount
SOIC packages.
This device is only recommended
for 5V automotive temperature applications. For all
commercial and industrial temperature applica-
tions, the 93LC66A/B is recommended.
ADDRESS
COUNTER
DATA
REGISTER
DI
MEMORY
DECODE
LOGIC
CLOCK
GENERATOR
V
CC
V
SS
OUTPUT
BUFFER
DO
CS
CLK
Microwire is a registered trademark of National Semiconductor.
漏
1998 Microchip Technology Inc.
Preliminary
DS21207B-page 1