© 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

µA 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

DI

CS

CLK

DO

MEMORY

ARRAY

ADDRESS

DECODER

ADDRESS

COUNTER

DATA

REGISTER

OUTPUT

BUFFER

MEMORY

DECODE

LOGIC

CLOCK

GENERATOR

CS

CLK

DI

DO

1

2

3

4

8

7

6

5

NC

NC

CS

CLK

DI

DO

NC

NC

NU

CS

CLK

NC

DO

DI

CS

CLK

DI

DO

1

2

3

4

8

7

6

5

NC

NC

TSSOP

SOIC

SOIC

1

2

3

4

DIP

8

7

6

5

1

2

3

4

8

7

6

5

Microwire is a registered trademark of National Semiconductor Incorporated.