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1997 Microchip Technology Inc.

Preliminary

DS21172D-page 1
M

93C46B

FEATURES

• Single supply 5.0V operation
• Low power CMOS technology
- 1 mA active current (typical)
-1 m

A standby current (maximum)
• 64 x 16 bit organization
• 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
• 1,000,000 E/W cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP/SOIC and 8-pin TSSOP packages
• Available for the following temperature ranges:

BLOCK DIAGRAM
DESCRIPTION

The Microchip Technology Inc. 93C46B is a 1K-bit,
low-voltage serial Electrically Erasable PROM. The
device memory is configured as 64 x 16 bits. Advanced
CMOS technology makes this device ideal for
low-power, nonvolatile memory applications. The
93C46B is available in standard 8-pin DIP, surface
mount SOIC, and TSSOP packages. The 93C46BX are
only offered in a 150 mil SOIC package.

PACKAGE TYPE

- Commercial (C): 0



C to +70



C
- Industrial (I): -40



C to +85



C
- Automotive (E): -40



C to +125



C
VCC
VSS
DI
CS
CLK
DO
MEMORY
ARRAY
ADDRESS
DECODER
ADDRESS
COUNTER
DATA
REGISTER
OUTPUT
BUFFER
MEMORY
DECODE
LOGIC
CLOCK
GENERATOR
93C46B
CS
CLK
DI
DO
1
2
3
4
8
7
6
5
VCC
NC
NC
VSS
CS
CLK
DI
DO
VCC
NC
NC
VSS
93C46B
NU
VCC
CS
CLK
NC
VSS
DO
DI
93C46BX
93C46B
CS
CLK
DI
DO
1
2
3
4
8
7
6
5
VCC
NC
NC
VSS
TSSOPSOICSOIC
1
2
3
4
DIP
8
7
6
5
1
2
3
4
8
7
6
5

1K 5.0V Microwire



Serial EEPROM

Microwire is a registered trademark of National Semiconductor Incorporated.