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.

特性 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)