W27E257-12中文资料华邦电子数据手册PDF规格书

GENERAL DESCRIPTION

The W27E257 is a high-speed, low-power Electrically Erasable and Programmable Read Only Memory organized as 32768 ´ 8 bits that operates on a single 5 volt power supply. The W27E257 provides an electrical chip erase function. This part was the same EPROM Writers utilities as the W27E256.

FEATURES

· High speed access time: 100/120/150 nS (max.)

· Read operating current: 15 mA (typ.)

· Erase/Programming operating current 1 mA (typ.)

· Standby current: 5 mA (typ.)

· Single 5V power supply

· +14V erase/+12V programming voltage

· Fully static operation

· All inputs and outputs directly TTL/CMOS compatible

· Three-state outputs

· Available packages: 28-pin 600 mil DIP and 32-pin PLCC