beautypg.com

Rainbow Electronics AT24C128 User Manual

Wire serial eeproms, Features, Description

background image

1

Features

Low-voltage and Standard-voltage Operation

– 2.7 (V

CC

= 2.7V to 5.5V)

– 1.8 (V

CC

= 1.8V to 3.6V)

Internally Organized 16,384 x 8 and 32,768 x 8

2-wire Serial Interface

Schmitt Trigger, Filtered Inputs for Noise Suppression

Bidirectional Data Transfer Protocol

1 MHz (5V), 400 kHz (2.7V, 2.5V) and 100 kHz (1.8V) Compatibility

Write Protect Pin for Hardware and Software Data Protection

64-byte Page Write Mode (Partial Page Writes Allowed)

Self-timed Write Cycle (5 ms Typical)

High Reliability

– Endurance: 100,000 Write Cycles
– Data Retention: 40 Years

Automotive Grade and Extended Temperature Devices Available

8-pin JEDEC PDIP, 8-pin JEDEC and EIAJ SOIC, 8-pin TSSOP, 14-pin TSSOP and 8-ball
dBGA

TM

Packages

Description

The AT24C128/256 provides 131,072/262,144 bits of serial electrically erasable and
programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8
bits each. The device’s cascadable feature allows up to 4 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 devices are
available in space-saving 8-pin JEDEC PDIP, 8-pin JEDEC SOIC, 8-pin EIAJ SOIC, 8-
pin TSSOP, 14-pin TSSOP and 8-ball dBGA packages. In addition, the entire family is
available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 3.6V) versions.

2-wire Serial
EEPROMs

128K (16,384 x 8)

256K (32,768 x 8)

AT24C128
AT24C256

Rev. 0670H–SEEPR–07/02

Pin Configurations

Pin Name

Function

A0 - A1

Address Inputs

SDA

Serial Data

SCL

Serial Clock Input

WP

Write Protect

NC

No Connect

8-pin PDIP

1

2

3

4

8

7

6

5

A0

A1

NC

GND

VCC

WP

SCL

SDA

8-pin SOIC

1

2

3

4

8

7

6

5

A0

A1

NC

GND

VCC

WP

SCL

SDA

14-pin TSSOP

1

2

3

4

5

6

7

14

13

12

11

10

9

8

A0

A1

NC

NC

NC

NC

GND

VCC

WP

NC

NC

NC

SCL

SDA

8-ball dBGA

Bottom View

VCC

WP

SCL

SDA

A0

A1

NC

GND

1

2

3

4

8

7

6

5

8-pin TSSOP

1

2

3

4

8

7

6

5

A0

A1

NC

GND

VCC

WP

SCL

SDA