1

Features

– 2.7 (V

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

Description

The AT24C64B provides 65,536 bits of serial electrically erasable and programmable

read only memory (EEPROM) organized as 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 applications where low power

and low voltage operation are essential. The AT24C64B is available in space saving

8-lead PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a

2-wire serial interface. In addition, the entire family is available in 2.7V (2.7 to 5.5V)

and 1.8V (1.8 to 5.5V) versions.

2-Wire

Serial EEPROM

64K (8192 x 8)

AT24C64B

3350C–SEEPR–5/04

2-Wire, 32K

Pin Configurations

Pin Name

Function

A0 - A2

Address Inputs

SDA

Serial Data

SCL

Serial Clock Input

WP

Write Protect

8-lead SOIC

1

2

3

4

8

7

6

5

A0

A1

A2

GND

VCC

WP

SCL

SDA

8-lead PDIP

1

2

3

4

8

7

6

5

A0

A1

A2

GND

VCC

WP

SCL

SDA

8-lead TSSOP

1

2

3

4

8

7

6

5

A0

A1

A2

GND

VCC

WP

SCL

SDA