Am28F256

Features:

 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-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 V_CC +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

Pinout




Specifications

Storage Temperature. . . . . . . . . . . . 65°C to +150°C
Plastic Packages . . . . . . . . . . . . . . .  65°C to +125°C
Ambient Temperature
with Power Applied. . . . . . . . . . . . . .55°C to + 125°C
Voltage with Respect To Ground
All pins except A9 and V_PP (Note 1) . . .2.0 V to +7.0 V
V_CC(Note 1). . . . . . . . . . . . . . . . . . . . . 2.0 V to +7.0 V
A9 (Note 2). . . . . . . . . . . . . . . . . . . . .2.0 V to +14.0 V
V_PP(Note 2). . . . . . . . . . . . . . . . . . . .  2.0 V to +14.0 V
Output Short Circuit Current (Note 3) . . . . . . . . 200 mA


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 readwrite 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 microproces sors without wait states. To eliminate bus contention, the Am28F256 has separate chip enable CE#and output enable OE#controls.