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 or TSOP 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 or TSOP
• 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