Description
The W39V040FB is a 4-megabit, 3.3-volt only CMOS flash memory organized as 512K ? 8 bits. For flexible erase capability, the 4Mbits of data are divided into 8 uniform sectors of 64 Kbytes. The device can be programmed and erased in-system with a standard 3.3V power supply. A 12-volt VPP is required for accelerated program. The unique cell architecture of the W39V040FB results in fast program/erase operations with extremely low current consumption. This device can operate at two modes, Programmer bus interface mode, Firmware Hub (FWH) bus interface mode. As in the Programmer interface mode, it acts like the traditional flash but with a multiplexed address inputs. But in the FWH interface mode, this device complies with the Intel FWH specification. The device can also be programmed and erased using standard EPROM programmers
Features
Single 3.3-volt Read/Erase/ Program operations
Read access time:70ns
Endurance: 10K cycles (typ)?
8 Even sectors with 64K bytes each,
Hardware protection: 64K byte Top Boot Block with lockout protection/ #TBL & #WP support the whole chip hardware protection
Automatic program and erase timing with internal VPP operation
twenty-year data retentions
TTL compatible I/O
JEDEC standard byte-wide pinouts