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AT25010-10PC

SPI Serial EEPROMs

Atmel Corporation 

Features

• Serial Peripheral Interface (SPI) Compatible

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

• 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)

• 2.1 MHz Clock Rate (5V) Compatibility

• 8-Byte Page Mode

• 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 (10 ms Max)

• High Reliability

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

– ESD Protection: >4000V

• Automotive Grade and Extended Temperature Devices Available

• 8-Pin PDIP and JEDEC SOIC Packages

Description

The AT25010/020/040 provides 1024/2048/4096 bits of serial electrically erasable

programmable read only memory (EEPROM) organized as 128/256/512 words of 8

bits each. The device is optimized for use in many industrial and commercial applica-

tions where low power and low voltage operation are essential. The AT25010/020/040

is available in space saving 8-pin PDIP and 8-pin JEDEC (SOIC) packages.

The AT25010/020/040 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 sepa-

rate ERASE cycle is required before WRITE.

BLOCK WRITE protection is enabled by programming the status register with one of

four blocks of write protection. Separate program enable and program disable instruc-

tions are provided for additional data protection. Hardware data protection is provided

via the WP pin to protect against inadvertent write attempts. The HOLD pin may be

used to suspend any serial communication without resetting the serial sequence.

Pin Configurations

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

8-Pin PDIP

CS 1

SO 2

WP 3

GND 4

8 VCC

7 HOLD

6 SCK

5 SI

8-Pin SOIC

CS 1

SO 2

WP 3

GND 4

8 VCC

7 HOLD

6 SCK

5 SI

SPI Serial

EEPROMs

1K (128 x 8)

2K (256 x 8)

4K (512 x 8)

AT25010

AT25020

AT25040

SPI, 1K Serial

E2PROM

Rev. 0606E–08/98

1

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