* Note: Pins 3, 4 and 17, 18 are internally connected for 14-lead TSSOP socket compatibility.

SPI Serial

E

128K (16384 x 8)

AT25128

Preliminary

Features

Protect 1/4, 1/2, or Entire Array

Both Hardware and Software Data Protection

Endurance: 100,000 Cycles

Data Retention: 100 Years

Description

The AT25128 provides 131,072 bits of serial electrically erasable programmable read

only memory (EEPROM) organized as 16,384 words of 8 bits each. The device is

optimized for use in many industrial and commercial applications where low power

and low voltage operation are essential. The AT25128 is available in space saving

8-pin PDIP, JEDEC SOIC, and 14-pin and 20-pin TSSOP packages.

(continued)

Pin Configurations

Pin Name

Function

CS

Chip Select

SCK

Serial Data Clock

SI

Serial Data Input

SO

Serial Data Output

GND

Ground

Power Supply

WP

Write Protect

HOLD

Suspends Serial Input

NC

No Connect

DC

Don’t Connect

1

2

3

4

8

7

6

5

CS

SO

WP

GND

VCC

HOLD

SCK

SI

8-Pin PDIP

1

2

3

4

5

6

7

14

13

12

11

10

9

8

CS

SO

NC

NC

NC

WP

GND

VCC

HOLD

NC

NC

NC

SCK

SI

14-Pin SOIC

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

CS

SO

NC

NC

NC

NC

WP

GND

VCC

HOLD

NC

NC

NC

NC

SCK

SI

16-Lead SOIC

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

NC

CS

SO

SO

NC

NC

WP

GND

DC

NC

NC

VCC

HOLD

HOLD

NC

NC

SCK

SI

DC

NC

20-Lead TSSOP*