1

Features

– 5.0 (V

– 2.7 (V

– 1.8 (V

– Protect 1/4, 1/2, or Entire Array

Both Hardware and Software Data Protection

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

– ESD Protection: >4000V

Description

The AT25080/160/320/640 provides 8192/16384/32768/65536 bits of serial electri-

cally erasable programmable read only memory (EEPROM) organized as

1024/2048/4096/8192 words of 8 bits each. The device is optimized for use in many

industrial and commercial applications where low power and low voltage operation

SPI Serial

EEPROMs

8K (1024 x 8)

16K (2048 x 8)

32K (4096 x 8)

64K (8192 x 8)

AT25080

AT25160

AT25320

AT25640

Rev. 0675C–08/98

(continued)

Pin Configuration

Pin Name

Function

CS

Chip Select

SCK

Serial Data Clock

SI

Serial Data Input

SO

Serial Data Output

GND

Ground

V

CC

Power Supply

WP

Write Protect

HOLD

Suspends Serial Input

NC

No Connect

DC

Don’t Connect

8-Pin PDIP

1

2

3

4

8

7

6

5

CS

SO

WP

GND

VCC

HOLD

SCK

SI

8-Pin SOIC

1

2

3

4

8

7

6

5

CS

SO

WP

GND

VCC

HOLD

SCK

SI

14-Lead TSSOP

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

20-Lead TSSOP*

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

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