AT24C64A(2004) データシートの表示（PDF） - Atmel Corporation

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AT24C64A
(Rev.:2004)

2-Wire Serial EEPROM

Atmel Corporation 

Features

• Low-Voltage and Standard-Voltage Operation

– 2.7 (VCC = 2.7V to 5.5V)

– 1.8 (VCC = 1.8V to 5.5V)

• Low-Power Devices (ISB = 6 µA @ 5.5V) Available

• Internally Organized 4096 x 8, 8192 x 8

• 2-Wire Serial Interface

• Schmitt Trigger, Filtered Inputs for Noise Suppression

• Bidirectional Data Transfer Protocol

• 100 kHz (1.8V) and 400 kHz (2.5V) Clock Rate for AT24C32A

• 400 kHz (1.8V) Clock Rate for AT24C64A

• Write Protect Pin for Hardware Data Protection

• 32-Byte Page Write Mode (Partial Page Writes Allowed)

• Self-Timed Write Cycle (5 ms Max)

• High Reliability

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

• Automotive Grade, Extended Temperature and Lead-free/Halogen-free

Devices Available

• 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead MAP and 8-lead

TSSOP Packages

Description

The AT24C32A/64A provides 32,768/65,536 bits of serial electrically erasable and

programmable read only memory (EEPROM) organized as 4096/8192 words of 8 bits

each. The device’s cascadable feature allows up to 8 devices to share a common 2-

wire bus. The device is optimized for use in many industrial and commercial applica-

tions where low power and low voltage operation are essential. The AT24C32A/64A is

available in space saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ

SOIC, 8-lead MAP and 8-lead TSSOP packages and is accessed via a 2-wire serial

interface. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V

(1.8V to 5.5V) versions.

2-Wire

Serial EEPROM

32K (4096 x 8)

64K (8192 x 8)

AT24C32A

AT24C64A

Pin Configurations

Pin Name

A0 - A2

SDA

SCL

WP

Function

Address Inputs

Serial Data

Serial Clock Input

Write Protect

8-lead SOIC

A0 1

A1 2

A2 3

GND 4

8 VCC

7 WP

6 SCL

5 SDA

8-lead MAP

VCC 8

WP 7

SCL 6

SDA 5

1 A0

2 A1

3 A2

4 GND

Bottom View

8-lead TSSOP

A0 1

A1 2

A2 3

GND 4

8 VCC

7 WP

6 SCL

5 SDA

8-lead PDIP

A0 1

A1 2

A2 3

GND 4

8 VCC

7 WP

6 SCL

5 SDA

3054N–SEEPR–2/04

1

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