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DESCRIPTION

The X28C256 is an 32K x 8 E2PROM, fabricated with Xicor’s proprietary, high performance, floating gate CMOS technology. Like all Xicor programmable non volatile memories the X28C256 is a 5V only device. The

X28C256 features the JEDEC approved pinout for byte wide memories, compatible with industry standard RAMs.

FEATURES

? Access Time: 200ns

? Simple Byte and Page Write

— Single 5V Supply

—No External High Voltages or VPP Control

Circuits

— Self-Timed

—No Erase Before Write

—No Complex Programming Algorithms

—No Overerase Problem

? Low Power CMOS:

—Active: 60mA

—Standby: 200?A

? Software Data Protection

— Protects Data Against System Level Inadvertent Writes

? High Speed Page Write Capability

? Highly Reliable Direct Write? Cell

— Endurance: 100,000 Write Cycles

— Data Retention: 100 Years

? Early End of Write Detection

— DATA Polling

—Toggle Bit Polling