Datasheet > FM25C020ULZEM8

FM25C020ULZEM8

更新时间： 2024-09-24 23:52:19

品牌	Logo	应用领域
其他 - ETC		内存集成电路光电二极管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时钟
页数	文件大小	规格书
11页	122K
描述
SPI Serial EEPROM

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中文翻译

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FM25C020ULZEM8 数据手册

April 2001

FM25C020U

2K-Bit SPI™ Interface

Serial CMOS EEPROM

General Description

Functions

The FM25C020U is a 2K (2,048) bit serial interface CMOS

EEPROM (Electrically Erasable Programmable Read-Only

Memory). This device fully conforms to the SPI 4-wire protocol

whichusesChipSelect(/CS), Clock(SCK), Data-in(SI)andData-

out (SO) pins to synchronously control data transfer between the

SPI microcontroller and the EEPROM. In addition, the serial

interface allows a minimal pin count, packaging designed to

simplify PC board layout requirements and offers the designer a

variety of low voltage and low power options.

I SPI MODE 0 interface

I 2,048 bits organized as 256 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

Features

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

I Sequential read of entire array

I 4 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

FM25C020U

www.fairchildsemi.com

12 3 4 5 6 7...11

中文翻译

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与FM25C020ULZEM8相关器件

型号	品牌	获取价格	描述	数据表
FM25C020ULZEM8X	ROCHESTER	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8
FM25C020ULZEM8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8
FM25C020ULZEMT8	ETC	获取价格	SPI Serial EEPROM
FM25C020ULZEN	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDIP8, PLASTIC, DIP-8
FM25C020ULZM8	ETC	获取价格	SPI Serial EEPROM
FM25C020ULZM8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8
FM25C020ULZMT8	ETC	获取价格	SPI Serial EEPROM
FM25C020ULZN	ETC	获取价格	SPI Serial EEPROM
FM25C020UM8	ETC	获取价格	SPI Serial EEPROM
FM25C020UM8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8

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