DESCRIPTION
The CAT28C64B is a fast, low power, 5V-only CMOS Parallel E2PROM organized as 8K x 8-bits. It requires a simple interface for in-system programming. On-chip address and data latches, self-timed write cycle with auto-clear and VCC power up/down write protection eliminate additional timing and protection hardware. DATA Polling and Toggle status bits signal the start and end of the self-timed write cycle. Additionally, the CAT28C64B features hardware and software write protection.
The CAT28C64B is manufactured using Catalyst’s advanced CMOS floating gate technology. It is designed to endure 100,000 program/erase cycles and has a data retention of 100 years. The device is available in JEDEC approved 28-pin DIP, 28-pin TSOP, 28-pin SOIC, or, 32- pin PLCC package .

FEATURES
■ Fast Read Access Times:
   – 120/150ns
■ Low Power CMOS Dissipation:
   – Active: 25 mA Max.
   – Standby: 100 µA Max.
■ Simple Write Operation:
   – On-Chip Address and Data Latches
   – Self-Timed Write Cycle with Auto-Clear
■ Fast Write Cycle Time:
   – 5ms Max.
■ CMOS and TTL Compatible I/O
■ Hardware and Software Write Protection
■ Commercial, Industrial and Automotive
   Temperature Ranges
■ Automatic Page Write Operation:
   – 1 to 32 Bytes in 5ms
   – Page Load Timer
■ End of Write Detection:
   – Toggle Bit
   – DATA Polling
■ 100,000 Program/Erase Cycles
■ 100 Year Data Retention