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28F256

Advanced Micro Devices
Part Number 28F256
Manufacturer Advanced Micro Devices
Description 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt / Bulk Erase Flash Memory
Published May 28, 2005
Detailed Description FINAL Am28F256 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory DISTINCTIVE CHARACTERISTICS s High pe...
Datasheet PDF File 28F256 PDF File

28F256
28F256

Overview
FINAL Am28F256 256 Kilobit (32 K x 8-Bit) CMOS 12.
0 Volt, Bulk Erase Flash Memory DISTINCTIVE CHARACTERISTICS s High performance — 70 ns maximum access time s CMOS Low power consumption — 30 mA maximum active current — 100 µA maximum standby current — No data retention power consumption s Compatible with JEDEC-standard byte-wide 32-Pin EPROM pinouts — 32-pin PDIP — 32-pin PLCC — 32-pin TSOP s 10,000 write/erase cycles minimum s Write and erase voltage 12.
0 V ±5% s Latch-up protected to 100 mA from –1 V to V CC +1 V s Flasherase Electrical Bulk Chip-Erase — One second typical chip-erase s Flashrite Programming — 10 µs typical byte-program — 0.
5 second typical chip program s Command register architecture for microprocessor/microcontroller compatible write interface s On-chip address and data latches s Advanced CMOS flash memory technology — Low cost single transistor memory cell s Automatic write/erase pulse stop timer 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 nonvolatile 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.
The standard Am28F256 offers access times as fast as 70 ns, allowing operation of high-speed microprocessors without wait states.
To eliminate bus contention, the Am28F256 has separate chip enable (CE #) and output enable (OE #) controls.
AMD’s Flash memories augment EPROM functionality with in-circuit electrical erasure and programming.
The Am28F256 uses a command register to manage this functionality, while maintaining a standard JEDEC Flash Standard 32-pin pinout.
The command register allows for 100% TTL level control inputs and fixed power supply levels during erase and programming.
AMD’s Flash technology reliably stores memor y contents ev...


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