© 1995 Microchip Technology Inc.

DS11182C-page 1

FEATURES

• Low power CMOS technology

• 5 volt only operation

• Self-timed write cycle (including auto-erase)

• Page-write buffer

• 1ms write cycle time for single byte

• 1,000,000 ERASE/WRITE cycles guaranteed

• Data retention >200 years

• 8-pin DIP or SOIC package

• Available for extended temperature ranges:

- Commercial: 0˚C to +70˚C

- Industrial: -40˚C to +85˚C

- Automotive: -40˚C to +125˚C

DESCRIPTION

The Microchip Technology Inc. 85C72/82/92 is a 1K/

2K/4K bit Electrically Erasable PROM. The device is

organized as shown with a two wire serial interface.

Advanced CMOS technology allows a significant

reduction in power over NMOS serial devices.

The

85C72/82/92 also has a page-write capability for up to

8 bytes of data (see chart). Up to eight 85C72/82/92s

may be connected to the two wire bus. The 85C72/82/

92 is available in standard 8-pin DIP and surface mount

SOIC packages.

85C72

85C82

85C92

Organization

128 x 8

256 x 8

2 x 256 x 8

Page Write

Buffer

2 Bytes

2 Bytes

8 Bytes

PACKAGE TYPE

BLOCK DIAGRAM

1

2

3

4

8

7

6

5

A0

A1

A2

V

NC

SCL

SDA

CC

1

2

3

4

8

7

6

5

V

NC

SCL

SDA

CC

A0

A1

A2

NC

SS

CC

A0

A1

NC

A2

NC

V

1

2

3

4

5

6

7

14

13

12

NC

SCL

SDA

NC

9

8

11

10

V

NC

NC

DIP

8-lead

SOIC

14-lead

SOIC

85C72

85C82

85C92

85C72

85C82

85C92

85C92

R/W AMP

A

D

D

R

E

S

S

P

O

I

N

T

E

R

MEMORY

ARRAY

SLAVE ADR.

DATA REG.

DATA

BUFFER

(FIF0)

CONTROL

LOGIC

SDA

SCL

A0

A2

A0 to

A7

INCREMENT

A1

85C72/82/92

1K/2K/4K 5.0V CMOS Serial EEPROM