1

Features

– Protect 1/4, 1/2, or Entire Array

Both Hardware and Software Data Protection

– Endurance: 100,000 Write Cycles

– Data Retention: >40 Years

Description

The AT25P1024 provides 1,048,576 bits of serial electrically erasable programmable

read only memory (EEPROM) organized as 131,072 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 AT25P1024 is available in space saving

20-lead JEDEC SOIC and 8-lead LAP packages.

The AT25P1024 is enabled through the Chip Select pin (CS) and accessed via a 3-

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 Configurations

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

1082I–SEEPR–7/06

SPI Serial

EEPROMs

1M (131,072 x 8)

AT25P1024

Note:

Not Recommended for new

design;

Please

refer

to

AT25FS010 datasheet.

20-lead SOIC

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

CS

SO

NC

NC

NC

NC

NC

NC

WP

GND

VCC

HOLD

NC

NC

NC

NC

NC

NC

SCK

SI

8-lead Leadless Array

Bottom View

1

2

3

4

8

7

6

5

VCC

HOLD

SCK

SI

CS

SO

WP

GND