W29C040-90B Ver la hoja de datos (PDF) - Winbond

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W29C040-90B

512K ·8 CMOS FLASH MEMORY

Winbond 

W29C040

512K × 8 CMOS FLASH MEMORY

GENERAL DESCRIPTION

The W29C040 is a 4-megabit, 5-volt only CMOS page mode Flash Memory organized as 512K × 8

bits. The device can be written (erased and programmed) in-system with a standard 5V power supply.

A 12-volt VPP is not required. The unique cell architecture of the W29C040 results in fast write (erase/

program) operations with extremely low current consumption (compared to other comparable 5-volt

flash memory products.) The device can also be erased and programmed by using standard EPROM

programmers.

FEATURES

• Single 5-volt write (erase and program)

operations

• Fast page-write operations

− 256 bytes per page

− Page write (erase/program) cycle: 5 mS

(typ.)

− Effective byte-write (erase/program) cycle

time: 19.5 µS

− Optional software-protected data write

• Fast chip-erase operation: 50 mS

• Two 16 KB boot blocks with lockout

• Page write (erase/program) cycles: 50K (typ.)

• Read access time: 70/90/120 nS

• Ten-year data retention

• Software and hardware data protection

• Low power consumption

− Active current: 25 mA (typ.)

− Standby current: 20 µA (typ.)

• Automatic write (erase/program) timing with

internal VPP generation

• End of write (erase/program) detection

− Toggle bit

− Data polling

• Latched address and data

• All inputs and outputs directly TTL compatible

• JEDEC standard byte-wide pinouts

• Available packages: 32-pin 600 mil DIP, TSOP

and PLCC

Publication Release Date: May 6, 2002

-1-

Revision A9

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