W29C022
256K
脳
8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W29C022 is a 2-megabit, 5-volt only CMOS flash memory organized as 256K
脳
8 bits. The device
can be written (erased and programmed) in-system with a standard 5V power supply. A 12-volt V
PP
is
not required. The unique cell architecture of the W29C022 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
鈥?/div>
鈥?/div>
Single 5-volt write (erase and program)
operations
Fast page-write operations
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128 bytes per page
鈭?/div>
Page write (erase/program) cycle: 10 mS
(max.)
鈭?/div>
Effective byte-write (erase/program) cycle
time: 39
碌S
鈭?/div>
Optional software-protected data write
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鈥?/div>
Software and hardware data protection
Low power consumption
鈭?/div>
Active current: 25 mA (typ.)
鈭?/div>
Standby current: 20
碌A(chǔ)
(typ.)
鈥?/div>
鈥?/div>
Automatic write (erase/program) timing with
internal V
PP
generation
End of write (erase/program) detection
鈭?/div>
Toggle bit
鈭?/div>
Data polling
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鈥?/div>
鈥?/div>
鈥?/div>
Fast chip-erase operation: 50 mS
Two 8 KB boot blocks with lockout
Typical page write (erase/program) cycles: 1K
Ten-year data retention
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鈥?/div>
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Latched address and data
All inputs and outputs directly TTL compatible
JEDEC standard byte-wide pinouts
-1-
Publication Release Date: March 26, 2002
Revision A3
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