器件名称: W29C020T-70A
功能描述: 256K X 8 CMOS FLASH MEMORY
文件大小: 267.62KB 共21页
简 介:W29C020 256K × 8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W29C020 is a 2-megabit, 5-volt only CMOS flash memory organized as 256K × 8 bits. The device can be written (erased and programmed) in-system with a standard 5V power supply. A 12-volt VPP is not required. The unique cell architecture of the W29C020 results in fast write (erase/program) operations with extremely low current consumption compared to other comparable 5-volt flash memory products. The device can also be written (erased and programmed) by using standard EPROM programmers.
FEATURES
Single 5-volt write (erase and program)
Software and hardware data protection Low power consumption Active current: 25 mA (typ.) Standby current: 20 A (typ.)
operations
Fast page-write operations
128 bytes per page Page write (erase/program) cycle: 10 mS (max.) Effective byte-write (erase/program) cycle time: 39 S Optional software-protected data write
Fast chip-erase operation: 50 mS Two 8 KB boot blocks with lockout Typical page write (erase/program) cycles:
Automatic write (erase/program) timing with
internal VPP generation
End of write (erase/program) detection
Toggle bit Data polling
Latched address and data All inputs and outputs directly TTL compatible JEDEC standard byte-wide pinouts Available packages: 32-pin 600 mil DIP, 450 mil
100/1K/10K
Read access time: 70/90/120 nS Ten-year data retention
SOP, TSOP, and 32-pin PLCC
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Publication Release Date: February 1998 Revision A3
W29C020
P……
