General Description

The A29040 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 A29040 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 A29040 can also be programmed in standard EPROM programmers.

特性 Features

■ 5.0V ± 10 for read and write operations

■ Access times:

- 55/70/90/120/150 (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)