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: 200µA
• 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