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W29C020-70 Datasheet

  • W29C020-70

  • 256K X 8 CMOS FLASH MEMORY

  • 21頁

  • WINBOND

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W29C020
256K
脳
8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W29C020 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 W29C020 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>
Single 5-volt write (erase and program)
鈥?/div>
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.)
operations
鈥?/div>
Fast page-write operations
鈭?/div>
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
鈥?/div>
Fast chip-erase operation: 50 mS
鈥?/div>
Two 8 KB boot blocks with lockout
鈥?/div>
Typical page write (erase/program) cycles:
鈥?/div>
Automatic write (erase/program) timing with
internal V
PP
generation
鈥?/div>
End of write (erase/program) detection
鈭?/div>
Toggle bit
鈭?/div>
Data polling
鈥?/div>
Latched address and data
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All inputs and outputs directly TTL compatible
鈥?/div>
JEDEC standard byte-wide pinouts
鈥?/div>
Available packages: 32-pin 600 mil DIP, 450 mil
100/1K/10K
鈥?/div>
Read access time: 70/90/120 nS
鈥?/div>
Ten-year data retention
SOP, TSOP, and 32-pin PLCC
-1-
Publication Release Date: February 1998
Revision A3

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