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W39L040 Datasheet, PDF (1/27 Pages) Winbond – 512 K X 8 CMOS FLASH MEMORY | |||
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W39L040
512K Ã 8 CMOS FLASH MEMORY
1. GENERAL DESCRIPTION
The W39L040 is a 4Mbit, 3.3-volt only CMOS flash memory organized as 512K Ã 8 bits. For flexible
erase capability, the 4Mbits of data are divided into 8 uniform sectors of 64 Kbytes, which are
composed of 16 smaller even pages with 4 Kbytes. The byte-wide (Ã 8) data appears on DQ7 â DQ0.
The device can be programmed and erased in-system with a standard 3.3V power supply. A 12-volt
VPP is not required. The unique cell architecture of the W39L040 results in fast program/erase
operations with extremely low current consumption (compared to other comparable 3.3-volt flash
memory products). The device can also be programmed and erased by using standard EPROM
programmers.
2. FEATURES
⢠Single 3.3-volt operations
â 3.3-volt Read
â 3.3-volt Erase
â 3.3-volt Program
⢠Fast Program operation:
â Byte-by-Byte programming: 50 µS (max.)
⢠Fast Erase operation:
â Chip Erase cycle time: 100 mS (max.)
â Sector Erase cycle time: 25 mS (max.)
â Page Erase cycle time: 25 mS (max.)
⢠Read access time: 70/90 nS
⢠8 Even sectors with 64K bytes each, which is
composed of 16 flexible pages with 4K bytes
⢠Any individual sector or page can be erased
⢠Hardware protection:
â Optional 16K byte or 64K byte Top/Bottom
Boot Block with lockout protection
⢠Flexible 4K-page size can be used as
Parameter Blocks
⢠Typical program/erase cycles: 1K/10K
⢠Twenty-year data retention
⢠Low power consumption
â Active current: 10 mA (typ.)
â Standby current: 2 µA (typ.)
⢠End of program detection
â Software method: Toggle bit/Data polling
⢠TTL compatible I/O
⢠JEDEC standard byte-wide pinouts
⢠Available packages: 32L PLCC, 32L TSOP (8 x
20 mm) and 32L STSOP (8 x 14 mm)
Publication Release Date: February 10, 2003
-1-
Revision A3
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