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AT25P1024
(Rev.:2001)

SPI Serial EEPROMs

Atmel Corporation 

Features

• Serial Peripheral Interface (SPI) Compatible

• Supports SPI Modes 0 (0,0) and 3 (1,1)

• 2.1 MHz Clock Rate

• 128-byte Page Mode Only for Write Operations

• Low-voltage and Standard-voltage Operation

– 5.0 (VCC = 4.5V to 5.5V)

– 2.7 (VCC = 2.7V to 5.5V)

– 1.8 (VCC = 1.8V to 3.6V)

• Block Write Protection

– Protect 1/4, 1/2, or Entire Array

• Write Protect (WP) Pin and Write Disable Instructions for

Both Hardware and Software Data Protection

• Self-Timed Write Cycle (5 ms Typical)

• High Reliability

– Endurance: 100,000 Write Cycles

– Data Retention: >40 Years

– ESD Protection: >3000V

• 20-lead JEDEC SOIC and 8-pad Leadless Array Package

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-pad LAP packages.

Pin Configurations

(continued)

Pin Name

CS

SCK

SI

SO

GND

VCC

WP

HOLD

Function

Chip Select

Serial Data Clock

Serial Data Input

Serial Data Output

Ground

Power Supply

Write Protect

Suspends Serial Input

20-lead SOIC

CS 1

SO 2

NC 3

NC 4

NC 5

NC 6

NC 7

NC 8

WP 9

GND 10

20 VCC

19 HOLD

18 NC

17 NC

16 NC

15 NC

14 NC

13 NC

12 SCK

11 SI

NC

No Connect

8-pad Leadless Array

VCC 8

HOLD 7

SCK 6

SI 5

1 CS

2 SO

3 WP

4 GND

Bottom View

SPI Serial

EEPROMs

1M (131,072 x 8)

AT25P1024

Rev. 1082E–06/01

1

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