24AA040-ST Datasheet

IC型號：
24AA040-ST
PDF描述：
4K SPI ⑩ Bus Serial EEPROM
文件大?。?/label>
188.80KB
PDF頁數(shù)：
12頁
芯片廠家：
MICROCHIP

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25AA040/25LC040/25C040

4K SPI

鈩?/div>

Bus Serial EEPROM

Max Clock

Frequency

1 MHz

2 MHz

3 MHz

Temp

Ranges

C,I

C,I,E

DEVICE SELECTION TABLE

Part

Number

25AA040

25LC040

25C040

Range

1.8-5.5V

2.5-5.5V

4.5-5.5V

PACKAGE TYPES

PDIP/SOIC

25xx040

HOLD

SCK

FEATURES

鈥?Low power CMOS technology

- Write current: 3 mA typical

- Read current: 500

碌

A typical

- Standby current: 500 nA typical

鈥?512 x 8 bit organization

鈥?16 byte page

鈥?Write cycle time: 5ms max.

鈥?Self-timed ERASE and WRITE cycles

鈥?Block write protection

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

鈥?Built-in write protection

- Power on/off data protection circuitry

- Write enable latch

- Write protect pin

鈥?Sequential read

鈥?High reliability

- Endurance: 10M cycles (guaranteed)

- Data retention: > 200 years

- ESD protection: > 4000 V

鈥?8-pin PDIP, SOIC, and TSSOP packages

鈥?Temperature ranges supported:

- Commercial: (C)

擄

C to +70

擄

- Industrial: (I)

-40

擄

C to +85

擄

- Automotive: (E) (25C040)

-40

擄

C to +125

擄

TSSOP

HOLD

SCK

25xx040

BLOCK DIAGRAM

Status

HV Generator

EEPROM

I/O Control

Logic

Memory

Control

Logic

Dec

Page Latches

Array

DESCRIPTION

The Microchip Technology Inc. 25AA040/25LC040/

25C040 (25xx040

) is a 4K bit serial Electrically Eras-

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.

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. Also, write operations to the device can be

disabled via the write protect pin (WP).

SCK

HOLD

Sense Amp.

R/W Control

Y Decoder

*25xx040 is used in this document as a generic part number for the 25AA040/25LC040/25C040 devices.

SPI is a trademark of Motorola.

漏

1997 Microchip Technology Inc.

Preliminary

DS21204A-page 1

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