Datasheet > FM25C640ULZM8X

FM25C640ULZM8X

更新时间： 2023-06-15 00:00:00

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		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光电二极管
页数	文件大小	规格书
19页	203K
描述
EEPROM, 8KX8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8

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FM25C640ULZM8X 数据手册

February 2002

FM25C640U

64K-Bit SPI™ Interface

Serial CMOS EEPROM

General Description

Functions

The FM25C640U is a 64K bit serial interface CMOS EEPROM

(Electrically Erasable Programmable Read-Only Memory). This

device fully conforms to the SPI 4-wire protocol which uses Chip

Select (/CS), Clock (SCK), Data-in (SI) and Data-out (SO) pins to

synchronouslycontroldatatransferbetweentheSPImicrocontroller

andtheEEPROM.Inaddition,theserialinterfaceallowsaminimal

pin count, packaging designed to simplify PC board layout re-

quirementsandoffersthedesigneravarietyoflowvoltageandlow

power options.

I SPI MODE 0 interface

I 64K bits organized as 8K x 8

I Extended 2.7V to 5.5V operating voltage

I 2.1 MHz operation @ 4.5V - 5.5V

I Self-timed programming cycle

I "Programming complete" indicated by STATUS REGISTER

polling

I /WP pin and BLOCK WRITE protection

This SPI EEPROM family is designed to work with the 68HC11 or

any other SPI-compatible, high-speed microcontroller and offers

both hardware (/WP pin) and software ("block write") data protec-

tion. For example, entering a 2-bit code into the STATUS REGIS-

TER prevents programming in a selected block of memory and all

Features

I Sequential read of entire array

I 32 byte "Page write" mode to minimize total write time per

byte

programming can be inhibited by connecting the /WP pin to V_SS

;

allowing the user to protect the entire array or a selected section.

In addition, SPI devices feature a /HOLD pin, which allows a

temporary interruption of the datastream into the EEPROM.

I /WP pin and BLOCK WRITE protection to prevent inadvert-

ent programming as well as programming ENABLE and

DISABLE opcodes.

I /HOLD pin to suspend data transfer

Fairchild EEPROMs are designed and tested for applications

requiring high endurance, high reliability, and low power con-

sumption for a continuously reliable non-volatile solution for all

markets.

I Typical 1µA standby current (I_SB) for "L" devices and 0.1µA

standby current for "LZ" devices.

I Endurance: Up to 1,000,000 data changes

I Data retention greater than 40 years

Block Diagram

/CS

/HOLD

SCK

V_CC

V_SS

Instruction

Decoder

Control Logic

and Clock

/WP

Instruction

Generators

Program

Enable

Address

Counter/

High Voltage

Generator

and

Program

Timer

V_PP

Decoder

EEPROM Array

Read/Write Amps

Data In/Out Register

8 Bits

Data Out

Buffer

Non-Volatile

Status Register

SPI™ is a trademark of Motorola Corporation

FM25C640U Rev. B

www.fairchildsemi.com

12 3 4 5 6 7...19

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与FM25C640ULZM8X相关器件

型号	品牌	获取价格	描述	数据表
FM25C640ULZN	ETC	获取价格	SPI Serial EEPROM
FM25C640UM8	ETC	获取价格	SPI Serial EEPROM
FM25C640UM8X	FAIRCHILD	获取价格	EEPROM, 8KX8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8
FM25C640UN	ETC	获取价格	SPI Serial EEPROM
FM25C640UV	FAIRCHILD	获取价格	64K-Bit SPI⑩ Interface Serial CMOS EEPROM
FM25C640UVM8	ETC	获取价格	SPI Serial EEPROM
FM25C640UVM8X	FAIRCHILD	获取价格	EEPROM, 8KX8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8
FM25C640UVN	ETC	获取价格	SPI Serial EEPROM
FM25CL04	RAMTRON	获取价格	4Kb FRAM Serial 3V Memory
FM25CL04_05	RAMTRON	获取价格	4Kb FRAM Serial 3V Memory

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