W29C020

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) 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 µS − Optional software-protected data write Fast chip-erase operation: 50 mS Two 8 KB boot blocks with lockout Typical page write (erase/program) cycles: 100/1K/10K Read access time: 70/90/120 nS Ten-...