| GENERAL DESCRIPTION The Am28F256 is a 256 K Flash memory organized as 32 Kbytes of 8 bits each. AMD’s Flash memories offer the most cost-effective and reliable read/write non volatile random access memory. The Am28F256 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 Am28F256 is erased when shipped from the factory. DISTINCTIVE CHARACTERISTICS ■ High performance — 70 ns maximum access time ■ CMOS Low power consumption — 30 mA maximum active current — 100 µA maximum standby current — No data retention power consumption ■ Compatible with JEDEC-standard byte-wid 32-Pin EPROM pinouts — 32-pin PDIP — 32-pin PLCC — 32-pin TSOP ■ 10,000 write/erase cycles mini-mum ■ 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 ■ Flashrite Programming — 10 µs typical byte-program — 0.5 second typical chip program ■ 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 |
