DESCRIPTION
The CAT28F020 is a high speed 256K x 8-bit electrically erasable and reprogrammable Flash memory ideally suited for applications requiring in-system or after-sale code updates. Electrical erasure of the full memory contents is achieved typically within 0.5 second.

FEATURES
■ Fast Read Access Time: 70/90/120 ns
■ Low Power CMOS Dissipation:
    – Active: 30 mA max (CMOS/TTL levels)
    – Standby: 1 mA max (TTL levels)
    – Standby: 100 µA max (CMOS levels)
■ High Speed Programming:
    – 10 µs per byte
    – 4 Seconds Typical Chip Program
■ 0.5 Seconds Typical Chip-Erase
■ 12.0V ± 5% Programming and Erase Voltage
■ Commercial, Industrial and Automotive Temperature Ranges
■ Stop Timer for Program/Erase
■ On-Chip Address and Data Latches
■ JEDEC Standard Pinouts:
    – 32-pin DIP
    – 32-pin PLCC
    – 32-pin TSOP (8 x 20)
■ 100,000 Program/Erase Cycles
■ 10 Year Data Retention
■ Electronic Signature