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Functional description

The AS29F040 is a 4-megabit, 5-volt-only Flash memory device organized as 512K bytes of 8 bits each. For flexible erase an program capability, the 4 megabits of data is divided into eight 64K-byte sectors. The ×8 data appears on DQ0–DQ7. The AS29F040 is offered in JEDEC standard 32-pin TSOP and 32-pin PLCC packages. This device is designed to be programmed an erased in-system with a single 5.0V VCC supply. The device can also be reprogrammed in standard EPROM programmers.

Features

? Organization:512K words × 8 bits

? Industrial and commercial temperature

? Sector architecture

- Eight 64K byte sectors

- Erase any combination of sectors or full chip

? Single 5.0±0.5V power supply for read/write operations

? Sector protection

? High speed 55/70/90/120/150 ns address access time

? Automated on-chip programming algorithm

- Automatically programs/verifies data at specified address

? Automated on-chip erase algorithm

- Automatically preprograms/erases chip or specified sectors

? 10,000 write/erase cycle endurance

? Low power consumption

- 30 mA maximum read current

- 60 mA maximum program current

- 400 μA typical standby current

? JEDEC standard software, packages and pinouts

- 32-pin TSOP

- 32-pin PLCC

? Detection of program/erase cycle completion

- DQ7 DATA polling

- DQ6 toggle bit

? Erase suspend/resume

- Supports reading data from or programming data to a sector not being erased

? Low VCC write lock-out below 2.8V