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W49F020 Datasheet, PDF (1/21 Pages) Winbond – 256K X 8 CMOS FLASH MEMORY | |||
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Preliminary W49F020
256K Ã 8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W49F020 is a 2-megabit, 5-volt only CMOS flash memory organized as 256K Ã 8 bits. The device
can be programmed and erased in-system with a standard 5V power supply. A 12-volt VPP is not
required. The unique cell architecture of the W49F020 results in fast program/erase operations with
extremely low current consumption (compared to other comparable 5-volt flash memory products). The
device can also be programmed and erased using standard EPROM programmers.
FEATURES
⢠Single 5-volt operations:
â 5-volt Read
â 5-volt Erase
â 5-volt Program
⢠Fast Program operation:
â Byte-by-Byte programming: 50 µS (max.)
⢠Fast Erase operation: 100 mS (typ.)
⢠Fast Read access time: 70/90 nS
⢠Endurance: 1K/10K cycles (typ.)
⢠Twenty-year data retention
⢠Hardware data protection
⢠One 8K byte Boot Block with Lockout
protection
⢠Low power consumption
â Active current: 25 mA (typ.)
â Standby current: 20 µA (typ.)
⢠Automatic program and erase timing with
internal VPP generation
⢠End of program or erase detection
â Toggle bit
â Data polling
⢠Latched address and data
⢠TTL compatible I/O
⢠JEDEC standard byte-wide pinouts
⢠Available packages: 32-pin DIP and 32-pin
TSOP and 32-pin-PLCC
Publication Release Date: October 1999
-1-
Revision A1
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