DESCRIPTION
The CAT28HT64 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 CAT28HT64 features hardware and software write protection.

FEATURES
■ Fast Read Access Times: – 150/200ns
■ Low Power CMOS Dissipation:
    – Active: 25 mA Max.
    – Standby: 300 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
■ 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