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W29C040 Datasheet, PDF (1/20 Pages) Winbond – 512K X 8 CMOS FLASH MEMORY | |||
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W29C040
512K Ã 8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W29C040 is a 4-megabit, 5-volt only CMOS page mode EEPROM organized as 512K Ã 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 written (erased and programmed) by using standard
EPROM programmers.
FEATURES
⢠Single 5-volt write (erase and program)
operations
⢠Fast page-write operations
â 256 bytes per page
â Page write (erase/program) cycle: 5 mS
(typ.)
â Effective byte-write (erase/program) cycle
time: 19.5 µS
â Optional software-protected data write
⢠Fast chip-erase operation: 50 mS
⢠Two 16 KB boot blocks with lockout
⢠Typical page write (erase/program) cycles:
1K/10K (typ.)
⢠Read access time: 90/120 nS
⢠Ten-year data retention
⢠Software and hardware data protection
⢠Low power consumption
â Active current: 25 mA (typ.)
â Standby current: 20 µA (typ.)
⢠Automatic write (erase/program) timing with
internal VPP generation
⢠End of write (erase/program) detection
â Toggle bit
â Data polling
⢠Latched address and data
⢠All inputs and outputs directly TTL compatible
⢠JEDEC standard byte-wide pinouts
⢠Available packages: TSOP and PLCC
Publication Release Date: May 1999
-1-
Revision A5
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