W27E257 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 Writer's utilities as the W27E256.
W27E257 Key Features
- High speed access time: 100/120/150 nS (max.)
- Read operating current: 15 mA (typ.)
- Erase/Programming operating current
- Standby current: 5 µA (typ.)
- Single 5V power supply
- +14V erase/+12V programming voltage
- Fully static operation
- All inputs and outputs directly TTL/CMOS
- Three-state outputs
- Available packages: 28-pin 600 mil DIP and