Datasheet > 24AA640-IST

24AA640-IST

更新时间： 2024-10-29 22:38:27

品牌	Logo	应用领域
美国微芯 - MICROCHIP		可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
12页	181K
描述
64K SPI Bus Serial EEPROM

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中文翻译

获取价格

数据手册

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24AA640-IST 数据手册

25AA640/25LC640/25C640

™

64K SPI Bus Serial EEPROM

PACKAGE TYPES

DEVICE SELECTION TABLE

Part

Number

VCC

Range

Max Clock

Frequency

Temp

Ranges

PDIP/SOIC

VCC

HOLD

SCK

25AA640

25LC640

25C640

1.8-5.5V

2.5-5.5V

4.5-5.5V

1 MHz

2 MHz

3 MHz

C,I

C,I,E

VSS

FEATURES

• Low power CMOS technology

- Write current: 3 mA typical

- Read current: 500 µA typical

- Standby current: 500 nA typical

• 8192 x 8 bit organization

• 32 byte page

• Write cycle time: 5ms max.

• Self-timed ERASE and WRITE cycles

• Block write protection

TSSOP

SCK

VSS

HOLD

VCC

- Protect none, 1/4, 1/2, or all of array

• Built-in write protection

- Power on/off data protection circuitry

- Write enable latch

BLOCK DIAGRAM

Status

- Write protect pin

• Sequential read

HV Generator

• High reliability

- Endurance: 1M cycles (guaranteed)

- Data retention: > 200 years

- ESD protection: > 4000 V

• 8-pin PDIP, SOIC, and TSSOP packages

• Temperature ranges supported:

EEPROM

Array

Memory

Control

Logic

I/O Control

Logic

- Commercial: (C)

- Industrial: (I)

0°C to +70°C

-40°C to +85°C

-40°C to +125°C

Dec

- Automotive: (E) (25C640)

Page Latches

DESCRIPTION

The Microchip Technology Inc. 25AA640/25LC640/

25C640 (25xx640 ) is a 64K bit serial Electrically Eras-

Y Decoder

able PROM. The memory is accessed via a simple

Serial Peripheral Interface (SPI) compatible serial bus.

The bus signals required are a clock input (SCK) plus

separate data in (SI) and data out (SO) lines. Access to

the device is controlled through a chip select (CS) input.

SCK

Sense Amp.

R/W Control

HOLD

VCC

VSS

Communication to the device can be paused via the

hold pin (HOLD). While the device is paused, transi-

tions on its inputs will be ignored, with the exception of

chip select, allowing the host to service higher priority

interrupts.

*25xx640 is used in this document as a generic part number for the 25AA640/25LC640/25C640 devices.

SPI is a trademark of Motorola.

1997 Microchip Technology Inc.

Preliminary

DS21223A-page 1

12 3 4 5 6 7...12

中文翻译

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