X28HC256S-15 datasheet, PDF - EEWORLD Datasheet

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X28HC256S-15: Description5 Volt, Byte Alterable E2PROM; File Size297KB，14 Pages; ManufacturerIntersil ( Renesas ); Websitehttp://www.intersil.com/cda/home/

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X28HC256S-15 Overview

5 Volt, Byte Alterable E2PROM

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X28HC256

256K, 32K x 8 Bit

Data Sheet

June 1, 2005

FN8108.0

5 Volt, Byte Alterable EEPROM

FEATURES

• Access time: 70ns

• Simple byte and page write

—Single 5V supply

—No external high voltages or V

control circuits

—Self-timed

—No erase before write

—No complex programming algorithms

—No overerase problem

• Low power CMOS

—Active: 60mA

—Standby: 500µA

• Software data protection

—Protects data against system level inadvertent

writes

• High speed page write capability

• Highly reliable Direct Write

™

cell

—Endurance: 1,000,000 cycles

—Data retention: 100 years

• Early end of write detection

—DATA polling

—Toggle bit polling

BLOCK DIAGRAM

DESCRIPTION

The X28HC256 is a second generation high perfor-

mance CMOS 32K x 8 EEPROM. It is fabricated with

Intersil’s proprietary, textured poly floating gate tech-

nology, providing a highly reliable 5 Volt only nonvola-

tile memory.

The X28HC256 supports a 128-byte page write opera-

tion, effectively providing a 24µs/byte write cycle, and

enabling the entire memory to be typically rewritten in

less than 0.8 seconds. The X28HC256 also features

DATA Polling and Toggle Bit Polling, two methods of

providing early end of write detection. The X28HC256

also supports the JEDEC standard Software Data Pro-

tection feature for protecting against inadvertent writes

during power-up and power-down.

Endurance for the X28HC256 is specified as a mini-

mum 1,000,000 write cycles per byte and an inherent

data retention of 100 years.

X Buffers

Latches and

Decoder

–A

Address

Inputs

Y Buffers

Latches and

DECODER

256Kbit

EEPROM

Array

I/O Buffers

and Latches

I/O

–I/O

Control

Logic and

Timing

Data Inputs/Outputs

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

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