AT25020AN-10SQ-2.7_05 데이터 시트보기 (PDF) - Atmel Corporation

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AT25020AN-10SQ-2.7_05

SPI Serial Extended Temperature EEPROMs

Atmel Corporation 

Features

• Serial Peripheral Interface (SPI) Compatible

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

– Data Sheet Describes Mode 0 Operation

• Medium-voltage and Standard-voltage Operation

– 2.7 (VCC = 2.7V to 5.5V)

• Extended Temperature Range −40°C to +125°C

• 5.0 MHz Clock Rate

• 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: One Million Write Cycles

– Data Retention: 100 Years

• 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP Packages

Description

The AT25010A/020A/040A provides 1024/2048/4096 bits of serial electrically-eras-

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

8 bits each. The device is optimized for use in many automotive applications where

low-power and low-voltage operation are essential. The AT25010A/020A/040A is

available in space-saving 8-pin PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP

packages.

The AT25010A/020A/040A 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.

Block write protection is enabled by programming the status register with one of four

blocks of write protection. Separate program enable and program disable instructions

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.

Table 1. Pin Configurations

8-lead PDIP

Pin Name

CS

SCK

Function

Chip Select

Serial Data Clock

CS 1

SO 2

WP 3

GND 4

8 VCC

7 HOLD

6 SCK

5 SI

SI

SO

GND

VCC

WP

Serial Data Input

Serial Data Output

Ground

Power Supply

Write Protect

8-lead SOIC

CS 1

SO 2

WP 3

GND 4

8 VCC

7 HOLD

6 SCK

5 SI

HOLD

Suspends Serial Input

8-lead TSSOP

CS 1

SO 2

WP 3

GND 4

8 VCC

7 HOLD

6 SCK

5 SI

SPI Serial

Extended

Temperature

EEPROMs

1K (128 x 8)

2K (256 x 8)

4K (512 x 8)

AT25010A

AT25020A

AT25040A

5087B–SEEPR–1/05

1

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