General Description
The A29040A is a 5.0 volt-only Flash memory organized as 524,288 bytes of 8 bits each. The 512 Kbytes of data are further divided into eight sectors of 64 Kbytes each for flexible sector erase capability. The 8 bits of data appear on I/O0 - I/O7 while the addresses are input on A0 to A18. The A29040A 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. Additional 12.0 volt VPP is not required for in-system write or erase operations. However, the A29040A can also be programmed in standard EPROM programmers.

FEATUREs
■ 5.0V ± 10% for read and write operations
■ Access times:
   - 55/70/90 (max.)
■ Current:
   - 20 mA typical active read current
   - 30 mA typical program/erase current
   - 1 mA typical CMOS standby
■ Flexible sector architecture
   - 8 uniform sectors of 64 Kbyte each
   - Any combination of sectors can be erased
   - Supports full chip erase
   - Sector protection:
      A hardware method of protecting sectors to prevent any inadvertent program or erase operations within that sector
■ Embedded Erase Algorithms
   - Embedded Erase algorithm will automatically erase the entire chip or any combination of designated sectors and verify the erased sectors
   - Embedded Program algorithm automatically writes and verifies bytes at specified addresses
■ Typical 100,000 program/erase cycles per sector
■ 20-year data retention at 125°C
   - Reliable operation for the life of the system
■ Compatible with JEDEC-standards
   - Pinout and software compatible with single-power supply Flash memory standard
   - Superior inadvertent write protection
■ Data Polling and toggle bits
   - Provides a software method of detecting completion of program or erase operations
■ 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
■ Package options
   - 32-pin P-DIP, PLCC, or TSOP (Forward type)