© 1996 Microchip Technology Inc.

DS11183D-page 1

24C01A/02A/04A

FEATURES

• Low power CMOS technology

• Hardware write protect

™ compatible

• 5.0V 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/SOIC packages

• Available for extended temperature ranges

DESCRIPTION

The Microchip Technology Inc. 24C01A/02A/04A is a

1K/2K/4K bit Electrically Erasable PROM. The device

is organized as shown, with a standard two wire serial

interface. Advanced CMOS technology allows a signif-

icant reduction in power over NMOS serial devices. A

special feature in the 24C02A and 24C04A provides

hardware write protection for the upper half of the block.

The 24C01A and 24C02A have a page write capability

of two bytes and the 24C04A has a page length of eight

bytes. Up to eight 24C01A or 24C02A devices and up

to four 24C04A devices may be connected to the same

two wire bus.

This device offers fast (1ms) byte write and

extended (-40

°C to 125°C) temperature operation. It

is recommended that all other applications use

Microchip’s 24LCXXB.

- Commercial (C):

0˚C to

+70˚C

- Industrial (I):

-40˚C to

+85˚C

- Automotive (E):

-40˚C to +125˚C

24C01A

24C02A

24C04A

Organization

128 x 8

258 x 8

2 x 256 x 8

Write Protect

None

080-0FF

100-1FF

Page Write

Buffer

2 Bytes

2 Bytes

8 Bytes

PACKAGE TYPES

BLOCK DIAGRAM

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

WP

V

NC

* “TEST” pin in 24C01A

A0

A1

A2

1

2

3

4

8

7

6

5

WP*

SCL

SDA

A0

A1

A2

1

2

3

4

8

7

6

5

WP*

SCL

SDA

DIP

8-lead

SOIC

14-lead

SOIC

Vcc

Vss

SDA

SCL

Data

Buffer

(FIFO)

Data Reg.

Vpp

R/W Amp

Memory

Array

A

d

d

r

e

s

s

P

o

i

n

t

e

r

A0 to

A7

Increment

A8

Slave Addr.

Control

Logic

A0 A1 A2 WP

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