W27E257
32K × 8 ELECTRICALLY ERASABLE EPROM
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 Writer's 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 µA (typ.
) • Single 5V power supply
• +14V erase/+12V programming
voltage • Fully static operation • All inputs and outputs directly TTL/
CMOS
compatible
• Three-state outputs •...