GENERAL DESCRIPTION

The W39V040A is a 4-megabit, 3.3-volt only CMOS flash memory organized as 512K ×8 bits. For flexible erase capability, the 4Mbitsof data are divided into 8 uniform sectors of 64 Kbytes, which are composed of 16 smaller even pages with 4 Kbytes. The device can be programmed and erased in-system with a standard 3.3V power supply.

FEATURES

• Single 3.3-volt Operations:

−3.3-volt Read

−3.3-volt Erase

−3.3-volt Program

• Fast Program Operation:

−Byte-by-Byte programming: 35 µS (typ.)

• Fast Erase Operation:

−Chip erase 100 mS (max.)

−Sector erase 25 mS (max.)

−Page erase 25 mS (max.)

• Fast Read access time: Tkq 11 nS

• Endurance: 10K cycles (typ.)

• Twenty-year data retention

• 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:

−Optional 16K byte or 64K byte Top Boot Block with lockout protection

−#TBL & #WP support the whole chip hardware protection

•Flexible 4K-page size can be used as Parameter Blocks

• Low power consumption

−Active current: 12.5 mA (typ. for LPC mode)

• Automatic program and erase timing with internal VPPgeneration

• End of program or erase detection

−Toggle bit

−Data polling

• Latched address and data

• TTL compatible I/O

• Available packages: 32L PLCC, 32L STSOP