GENERAL DESCRIPTION

The Am27X256 is a factory programmed and tested OTP EPROM. It is programmed after packaging prior to final test. Every device is rigorously tested under AC and DC operating conditions to your stable code. It is organized as 32 Kwords by 8 bits per word and is available in plastic dual in-line packages (PDIP), as well as plastic leaded chip carrier (PLCC) packages. ExpressROM devices provide a board-ready memory solution for medium to high volume codes with short leadtimes. This offers manufacturers a cost-effective and flexible alternative to OTP EPROMs and mask programmed ROMs.

DISTINCTIVE CHARACTERISTICS

■ As an OTP EPROM alternative:

— Factory optimized programming

— Fully tested and guaranteed

■ As a Mask ROM alternative:

— Shorter leadtime

— Lower volume per code

■ Fast access time

— 55 ns

■ Single +5 V power supply

■ Compatible with JEDEC-approved EPROM

pinout

■ ±10 power supply tolerance

■ High noise immunity

■ Low power dissipation

— 20 µA maximum CMOS standby current

■ Available in Plastic Dual-In-line Package (PDIP)

and Plastic Leaded Chip Carrier (PLCC)

■ Latch-up protected to 100 mA from –1 V to

VCC + 1 V

■ Versatile features for simple interfacing

— Both CMOS and TTL input/output compatibility

— Two line control functions