1

Features

– Datasheet Describes Mode 0 Operation

– 2.7 (V

– Protect 1/4, 1/2, or Entire Array

Data Protection

– Endurance: One Million Write Cycles

– Data Retention: 100 Years

lead TSSOP Packages

Description

The AT25080A/160A/320A/640A provides 8192/16384/32768/65536 bits of serial

electrically-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

are essential. The AT25080A/160A/320A/640A is available in space-saving 8-lead

PDIP, 8-lead JEDEC SOIC, 8-lead MAP, 8-lead Ultra Thin Mini-MAP (MLP 2x3) and 8-

lead TSSOP packages.

The AT25080A/160A/320A/640A is enabled through the Chip Select pin (CS) and

accessed via a three-wire interface consisting of Serial Data Input (SI), Serial Data

Output (SO), and Serial Clock (SCK). All programming cycles are completely self-

timed, and no separate erase cycle is required before write.

Table 1. Pin Configuration

Pin Name

Function

CS

Chip Select

SCK

Serial Data Clock

SI

Serial Data Input

SO

Serial Data Output

GND

Ground

VCC

Power Supply

WP

Write Protect

HOLD

Suspends Serial Input

NC

No Connect

DC

Don’t Connect

SPI Serial

EEPROMs

8K (1024 x 8)

16K (2048 x 8)

32K (4096 x 8)

64K (8192 x 8)

AT25080A

AT25160A

AT25320A

AT25640A

3347K–SEEPR–2/07

1

2

3

4

8

7

6

5

CS

SO

WP

GND

VCC

HOLD

SCK

SI

8-lead PDIP

1

2

3

4

8

7

6

5

CS

SO

WP

GND

VCC

HOLD

SCK

SI

8-lead SOIC

1

2

3

4

8

7

6

5

CS

SO

WP

GND

VCC

HOLD

SCK

SI

8-lead TSSOP

1

2

3

4

8

7

6

5

VCC

HOLD

SCK

SI

CS

SO

WP

GND

8-lead Ultra Thin Mini-MAP (MLP 2x3)

Bottom View

1

2

3

4

8

7

6

5

VCC

HOLD

SCK

SI

CS

SO

WP

GND

8-lead MAP

Bottom View