X28HC64: 5 Volt, Byte Alterable EEPROM 8K x 8Bit

FEATURES:

     1. 55ns Access Time
     2. Simple Byte and Page Write
        — Single 5V Supply
        — No External High Voltages or VPP Control
     3. Circuits
        — Self-Timed
        — No Erase Before Write
        — No Complex Programming Algorithms
        — No Overerase Problem
     4. Low Power CMOS
        — 40 mA Active Current Max.
        — 200 µA Standby Current Max.
     5. Fast Write Cycle Times
        — 64 Byte Page Write Operation
        — Byte or Page Write Cycle: 2ms Typical
        — Complete Memory Rewrite: 0.25 sec. Typical
        — Effective Byte Write Cycle Time: 32µs Typical
     6. Software Data Protection
     7. End of Write Detection
     8. DATA
        — Toggle Bit
     9. High Reliability
        — Endurance: 100,000 Cycles
        — Data Retention: 100 Years
     10. JEDEC Approved Byte-Wide Pinout

DESCRIPTION

The X28HC64 is an 8K x 8 E2PROM, fabricated with Xicor’s proprietary, high performance, floating gate
CMOS technology. Like all Xicor programmable non-volatile memories the X28HC64 is a 5V only device. The X28HC64 features the JEDEC approved pinout for byte-wide memories, compatible with industry standard RAMs.

The X28HC64 supports a 64-byte page write operation, effectively providing a 32µs/byte write cycle and enabling the entire memory to be typically written in 0.25 seconds. The X28HC64 also features DATA Polling and Toggle Bit Polling, two methods providing early end of write detection. In addition, the X28HC64 includes a user-optional software data protection mode that further enhances Xicor’s hardware write protect capability.

Xicor E2PROMs are designed and tested for applications requiring extended endurance. Inherent data retention is greater than 100 years.

For further information, view it online: X28HC64 (pdf | 25 pages)

X28C256: 5 Volt, Byte Alterable EEPROM 32K x 8 Bit

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.

The X28C256 supports a 64-byte page write operation, effectively providing a 78 s/byte write cycle and en- abling the entire memory to be typically written in less than 2.5 seconds. The X28C256 also features DATA and Toggle Bit   Polling, a system software support scheme used to indicate the early completion of a write cycle. In addition, the X28C256 includes a user-optional software data protection mode that further enhances Xicor’s hardware write protect capability.

Xicor E2PROMs are designed and tested for applications requiring extended endurance. Inherent data re- tention is greater than 100 years.

FEATURES

• Access Time:  150ns

• 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

For further information, view it online: X28C256 (pdf | 24 pages)