W49F020Q-70B中文资料华邦电子数据手册PDF规格书

GENERAL DESCRIPTION

The W49F020 is a 2-megabit, 5-volt only CMOS flash memory organized as 256K 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 W49F020 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 operations:

- 5-volt Read

- 5-volt Erase

- 5-volt Program

• Fast Program operation:

- Byte-by-Byte programming: 50 mS (max.)

• Fast Erase operation: 100 mS (typ.)

• Fast Read access time: 70/90 nS

• Endurance: 1K/10K cycles (typ.)

• Twenty-year data retention

• Hardware data protection

• One 8K byte Boot Block with Lockout protection

• Low power consumption

- Active current: 25 mA (typ.)

- Standby current: 20 mA (typ.)

• Automatic program and erase timing with internal VPP generation

• End of program or erase detection

- Toggle bit

- Data polling

• Latched address and data

• TTL compatible I/O

• JEDEC standard byte-wide pinouts

• Available packages: 32-pin DIP and 32-pin

TSOP and 32-pin-PLCC