93C66A Datasheet, PDF (1/12 Pages) Microchip Technology – 4K 5.0V Automotive Temperature Microwire Serial EEPROM

M
93C66A/B
4K 5.0V Automotive Temperature Microwire^® Serial EEPROM
FEATURES
• Single supply 5.0V operation
• Low power CMOS technology
- 1 mA active current (typical)
- 1 µA standby current (maximum)
• 512x 8 bit organization (93C66A)
• 256x 16 bit organization (93C66B)
• Self-timed ERASE and WRITE cycles (including
auto-erase)
• Automatic ERAL before WRAL
• Power on/off data protection circuitry
• Industry standard 3-wire serial interface
• Device status signal during ERASE/WRITE
cycles
• Sequential READ function
• 100,000 E/W cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP and SOIC packages
• Available for the following temperature ranges:
- Automotive (E):
-40°C to +125°C
DESCRIPTION
The Microchip Technology Inc. 93C66A/B is a 4K-bit,
low-voltage serial Electrically Erasable PROM. The
device memory is configured 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.
PACKAGE TYPE
PDIP
CS ₁
CLK 2
DI 3
DO 4
SOIC
CS ¹
CLK ²
DI ³
DO ⁴
8 VCC
7 NC
6 NC
5 VSS
8
VCC
7 _NC
6
NC
5
VSS
BLOCK DIAGRAM
MEMORY
ARRAY
ADDRESS
DECODER
ADDRESS
COUNTER
DATA
REGISTER
DI
MEMORY
DECODE
CS
LOGIC
CLK
CLOCK
GENERATOR
OUTPUT
BUFFER
DO
VCC
VSS
Microwire is a registered trademark of National Semiconductor.
© 1998 Microchip Technology Inc.
Preliminary
DS21207B-page 1