Winbond Electronics Corporation W39V040FB
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.GENERAL DESCRIPTION
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. 2.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: 9 μS (typ.) (VPP = 12V) − Byte-by-Byte programming: 12 μS (typ.) (VPP = Vcc)
● Fast Erase operation: − Sector erase 0.6 Sec. (typ.)
● Fast Read access time: Tkq 11 nS
● Endurance: 10K cycles (typ.)
● Twenty-year data retention
● 8 Even sectors with 64K bytes
● Any indiv...