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