W29C022中文資料華邦電子數(shù)據(jù)手冊(cè)PDF規(guī)格書

GENERAL DESCRIPTION

The W29C022 is a 2-megabit, 5-volt only CMOS flash memory organized as 256K x 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 W29C022 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: 39μS

- Optional software-protected data write

? Fast chip-erase operation: 50 mS

? Two 8 KB boot blocks with lockout

? Typical page write (erase/program) cycles: 1K

? Ten-year data retention

? Software and hardware data protection

? Low power consumption

- Active current: 25 mA (typ.)

- Standby current: 20 μA (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