1

Features

– 5.0 (V

– 2.7 (V

– 2.5 (V

– 1.8 (V

µµµA @ 5.5V) Available

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

– ESD Protection: >3,000V

and 8-pin TSSOP Packages

Description

The AT24C32/64 provides 32,768/65,536 bits of serial electrically erasable and pro-

grammable read only memory (EEPROM) organized as 4096/8192 words of 8 bits

each. The device’s cascadable feature allows up to 8 devices to share a common 2-

wire bus. The device is optimized for use in many industrial and commercial applica-

tions where low power and low voltage operation are essential. The AT24C32/64 is

available in space saving 8-pin JEDEC PDIP, 8-pin and 14-pin JEDEC SOIC, 8-pin

EIAJ SOIC, and 8-pin TSSOP packages and is accessed via a 2-wire serial interface.

In addition, the entire family is available in 5.0V (4.5V to 5.5V), 2.7V (2.7V to 5.5V),

2.5V (2.5V to 5.5V) and 1.8V (1.8V to 5.5V) versions.

2-Wire

Serial EEPROM

32K (4096 x 8)

64K (8192 x 8)

AT24C32

AT24C64

Rev. 0336F–08/98

2-Wire, 32K

Serial E

Pin Configurations

Pin Name

Function

A0 to A2

Address Inputs

SDA

Serial Data

SCL

Serial Clock Input

WP

Write Protect

8-Pin PDIP

1

2

3

4

8

7

6

5

A0

A1

A2

GND

VCC

WP

SCL

SDA

8-Pin SOIC

1

2

3

4

8

7

6

5

A0

A1

A2

GND

VCC

WP

SCL

SDA

14-Pin SOIC

1

2

3

4

5

6

7

14

13

12

11

10

9

8

NC

A0

A1

NC

A2

GND

NC

NC

VCC

WP

NC

SCL

SDA

NC

8-Pin TSSOP

1

2

3

4

8

7

6

5

A0

A1

A2

GND

VCC

WP

SCL

SDA