DESCRIPTION
The CAT28C64B is a fast, low power, 5V-only CMOS Parallel EEPROM 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.

FEATURES
■ Fast read access times:
   – 90/120/150ns
■ 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