GENERAL DESCRIPTION

The Am29F040B is a 4 Mbit, 5.0 volt-only Flash memory organized as 524,288 Kbytes of 8 bits each. The

512 Kbytes of data are divided into eight sectors of 64

Kbytes each for flexible erase capability. The 8 bits of

data appear on DQ0–DQ7. The Am29F040B is offered

in 32-pin PLCC, TSOP, and PDIP packages. This device

is designed to be programmed in-system with the standard system 5.0 volt VCC supply. A 12.0 volt VPP is not

required for write or erase operations. The device can

also be programmed in standard EPROM programmers.

DISTINCTIVE CHARACTERISTICS

■ 5.0 V ± 10 for read and write operations

— Minimizes system level power requirements

■ Manufactured on 0.32 µm process technology

— Compatible with 0.5 µm Am29F040 device

■ High performance

— Access times as fast as 55 ns

■ Low power consumption

— 20 mA typical active read current

— 30 mA typical program/erase current

— 1 µA typical standby current (standard access time to active mode)

■ Flexible sector architecture

— 8 uniform sectors of 64 Kbytes each

— Any combination of sectors can be erased

— Supports full chip erase

— Sector protection:

A hardware method of locking sectors to prevent any program or erase operations within that sector

■ Embedded Algorithms

— Embedded Erase algorithm automatically preprograms and erases the entire chip or any combination of designated sectors

— Embedded Program algorithm automatically writes and verifies bytes at specified addresses

■ Minimum 1,000,000 program/erase cycles per sector guaranteed

■ 20-year data retention at 125°C

— Reliable operation for the life of the system

■ Package options

— 32-pin PLCC, TSOP, or PDIP

■ Compatible with JEDEC standards

— Pinout and software compatible with single-power-supply Flash standard

— Superior inadvertent write protection

■ Data# Polling and toggle bits

— Provides a software method of detecting program or erase cycle completion

■ Erase Suspend/Erase Resume

— Suspends a sector erase operation to read data from, or program data to, a non-erasing sector, then resumes the erase operation