器件名称: W49F002U-90B
功能描述: 256K X 8 CMOS FLASH MEMORY
文件大小: 303.88KB 共23页
简 介:W49F002U 256K × 8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W49F002U is a 2-megabit, 5-volt only CMOS flash memory organized as 256K × 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 W49F002U 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: 5-volt Read 5-volt Erase 5-volt Program Fast Program operation: Byte-by-Byte programming: 35 S (typ.) Fast Erase operation: 100 mS (typ.) Fast Read access time: 70/90/120 nS Endurance: 10K cycles (typ.) Ten-year data retention Hardware data protection One 16K byte Boot Block with Lockout protection Two 8K byte Parameter Blocks
Two Main Memory Blocks (96K, 128K) Bytes
Low power consumption Active current: 25 mA (typ.) Standby current: 20 A (typ.)
Automatic program and erase timing with internal VPP generation End of program or erase detection Toggle bit 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
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Publication Release Date: April 2000 Revision A2
W49F002U
PIN CONFIGURATIONS BLOCK DIAGRAM
RESET A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ……
