GENERAL DESCRIPTION

The Am28F020 is a 2 Megabit Flash memory organized as 256 Kbytes of 8 bits each. AMD’s Flash memories offer the most cost-effective and reliable read/write non-volatile random access memory. The Am28F020 is packaged in 32-pin PDIP, PLCC, and TSOP versions. It is designed to be reprogrammed and erased in-system or in standard EPROM programmers. The Am28F020 is erased when shipped from the factory.

DISTINCTIVE CHARACTERISTICS

■ High performance

— Access times as fast as 70 ns

■ CMOS low power consumption

— 30 mA maximum active current

— 100 µA maximum standby current

— No data retention power consumption

■ Compatible with JEDEC-standard byte-wide

32-pin EPROM pinouts

— 32-pin PDIP

— 32-pin PLCC

— 32-pin TSOP

■ 10,000 write/erase cycles minimum

■ Write and erase voltage 12.0 V ±5

■ Latch-up protected to 100 mA from

–1 V to VCC +1 V

■ Flasherase Electrical Bulk Chip Erase

— One second typical chip erase time

■ Flashrite Programming

— 10 µs typical byte program time

— 4 s typical chip program time

■ Command register architecture for microprocessor/microcontroller compatible write interface

■ On-chip address and data latches

■ Advanced CMOS flash memory technology

— Low cost single transistor memory cell

■ Automatic write/erase pulse stop timer