Datasheet > 24C256

24C256

更新时间： 2022-11-27 07:53:11

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
页数	文件大小	规格书
12页	91K
描述
256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect

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24C256 数据手册

June 2000

FM24C256

256 KBit 2-Wire Bus Interface

Serial EEPROM with Write Protect

General Description

Features

The FM24C256/C256L/C256LZ devices are 256 Kbits CMOS

nonvolatile electrically erasable memory. These devices offer the

designer different low voltage and low power options. They

conform to all requirements in the Extended IIC 2-wire protocol.

Furthermore, they are designed to minimize device pin count and

simplify PC board layout requirements.

I Extended Operating Voltages

— C256: 4.5V - 5.5V

— C256L: 2.7V - 5.5V

— C256LZ: 2.7V - 5.5V

I Low Power CMOS

— 1mA active current typical

— C256/C256L: 10µA standby current typical

— C256LZ: less than 1µA standby current

The entire memory array can be write disabled (Write Protection)

by connecting the WP pin to V_CC

I 2-wire IIC serial interface

Functional address lines allow up to eight devices on the same

bus, for up to a total of 2 Mbit address space.

I 64 byte page write mode

I Max write cycle time of 6ms byte/page

I 40 years data retention

The IIC communication protocol uses CLOCK (SCL) and DATA

I/O (SDA) lines to synchronously clock data between the master

(forexampleamicroprocessor)andtheslaveEEPROMdevice(s).

I Endurance: 100,000 data changes

I Hardware write protect for entire array

I Schmitt trigger inputs for noise suppression

I Electrostatic discharge protection > 4000V

Fairchild EEPROMs are designed and tested for applications

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

sumption.

I 8-pin DIP and 8-pin SO (150 mil) packages. Contact factory

for CSP package availability

Block Diagram

WRITE

LOCKOUT

H.V. GENERATION

TIMING &CONTROL

START CYCLE

START

STOP

SDA

LOGIC

CONTROL

LOGIC

SLAVE ADDRESS

COMPARATOR

PROM

ARRAY

XDEC

SCL

LOAD

INC

WORD

ADDRESS

COUNTER

R/W

YDEC

OUT

DATA REGISTER

DS800023-1

www.fairchildsemi.com

FM24C256 rev. B.3

12 3 4 5 6 7...12

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