Datasheet > 存储 > EEPROM> 25AA256T-EMF

25AA256T-EMF

更新时间： 2024-11-23 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
26页	353K
描述
256K SPI Bus Serial EEPROM

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中文翻译

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数据手册

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25AA256T-EMF 数据手册

25AA256/25LC256

256K SPI^™Bus Serial EEPROM

Device Selection Table

Part Number

VCC Range

Page Size

Temp. Ranges

Packages

25LC256

25AA256

2.5-5.5V

1.8-5.5V

64 Byte

I, E

P, SN, ST, MF

Features

Description

• Max. clock 10 MHz

The Microchip Technology Inc. 25AA256/25LC256

(25XX256^*) are 256k-bit Serial Electrically Erasable

PROMs. 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.

• Low-power CMOS technology

- Max. Write Current: 5 mA at 5.5V, 10 MHz

- Read Current: 5 mA at 5.5V, 10 MHz

- Standby Current: 1 µA at 5.5V

• 32,768 x 8-bit organization

• 64 byte page

• Self-timed ERASE and WRITE cycles (5 ms

max.)

Communication to the device can be paused via the

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

transitions on its inputs will be ignored, with the

exception of Chip Select, allowing the host to service

higher priority interrupts.

• Block write protection

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

• Built-in write protection

The 25XX256 is available in standard packages

including 8-lead PDIP and SOIC, and advanced

packaging including 8-lead DFN and 8-lead TSSOP.

Pb-free (Pure Sn) finish is also available.

- Power-on/off data protection circuitry

- Write enable latch

- Write-protect pin

• Sequential read

• High reliability

Package Types (not to scale)

- Endurance: 1,000,000 erase/write cycles

- Data retention: > 200 years

- ESD protection: > 4000V

• Temperature ranges supported;

TSSOP

(ST)

PDIP/SOIC

(P, SN)

VCC

- Industrial (I):

- Automotive (E):

-40°C to +85°C

-40°C to +125°C

HOLD

SCK

HOLD

SCK

VSS

• Standard and Pb-free packages available

VSS

Pin Function Table

DFN

(MF)

Name

Function

Chip Select Input

VCC

HOLD

SCK

VSS

Serial Data Output

Write-Protect

Ground

VSS

Serial Data Input

Serial Clock Input

Hold Input

SPI is a registered trademark of Motorola Corporation.

SCK

HOLD

VCC

Supply Voltage

* 25XX256 is used in this document as a generic part number for the 25AA256, 25LC256 devices.

 2003 Microchip Technology Inc.

Preliminary

DS21822C-page 1

12 3 4 5 6 7...26

中文翻译

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与25AA256T-EMF相关器件

型号	品牌	获取价格	描述	数据表
25AA256T-EMFG	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256TEP	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256T-EP	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256T-EPG	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256TESM	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256TESN	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256T-ESN	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256T-ESNG	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256TEST	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM
25AA256T-EST	MICROCHIP	获取价格	256K SPI Bus Serial EEPROM

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