W29C020-70 Datasheet

  • W29C020-70

  • 256K X 8 CMOS FLASH MEMORY

  • 267.52KB

  • 21页

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W29C020
256K
8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W29C020 is a 2-megabit, 5-volt only CMOS flash memory organized as 256K
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
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Single 5-volt write (erase and program)
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Software and hardware data protection
Low power consumption
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Active current: 25 mA (typ.)
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Standby current: 20
碌A
(typ.)
operations
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Fast page-write operations
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128 bytes per page
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Page write (erase/program) cycle: 10 mS
(max.)
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Effective byte-write (erase/program) cycle
time: 39
碌S
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Optional software-protected data write
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Fast chip-erase operation: 50 mS
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Two 8 KB boot blocks with lockout
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Typical page write (erase/program) cycles:
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Automatic write (erase/program) timing with
internal V
PP
generation
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End of write (erase/program) detection
鈭?/div>
Toggle bit
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Data polling
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Latched address and data
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All inputs and outputs directly TTL compatible
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JEDEC standard byte-wide pinouts
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Available packages: 32-pin 600 mil DIP, 450 mil
100/1K/10K
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Read access time: 70/90/120 nS
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Ten-year data retention
SOP, TSOP, and 32-pin PLCC
-1-
Publication Release Date: February 1998
Revision A3

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