W39L020Q-90B中文資料華邦電子數據手冊PDF規(guī)格書

GENERAL DESCRIPTION

The W29EE012 is a 1-megabit, 5-volt only CMOS flash memory organized as 128K x 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 W29EE012 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 program and erase operations

? Fast page-write operations

- 128 bytes per page

- Page program cycle: 10 mS (max.)

- Effective byte-program cycle time: 39 μS

- Optional software-protected data write

? Fast chip-erase operation: 50 mS

? Page program/erase cycles: 1,000

? Ten-year data retention

? Software and hardware data protection

? Low power consumption

- Active current: 25 mA (typ.)

- Standby current: 20 μA (typ.)

? Automatic program timing with internal VPP generation

? End of program detection

- Toggle bit

- Data polling

? Latched address and data

? TTL compatible I/O

? JEDEC standard byte-wide pinouts