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W29C020CP90B ÃÖ¼ÒÁÖ¹®¼ö·® : 20°³ |
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256K ¢¥ 8 CMOS FLASH MEMORY
GENERAL DESCRIPTION The W29C020C 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 W29C020C 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 mS - Optional software-protected data write ¡¤ Fast chip-erase operation: 50 mS ¡¤ Two 8 KB boot blocks with lockout ¡¤ Whole chip cycling: 10K (typ.) ¡¤ Read access time: 70/90/120 nS ¡¤ Twenty-year data retention ¡¤ Software and hardware data protection ¡¤ Low power consumption - Active current: 25 mA (typ.) - Standby current: 20 mA (typ.) ¡¤ 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, 32-pin TSOP, and 32-pin PLCC
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