GENERAL DESCRIPTION
The Am27C040 is a 4 Mbit ultraviolet erasable programmable read-only memory. It is organized as 512K bytes, operates from a single +5 V supply, has a static standby mode, and features fast single address loca tion programming. The device is available in windowed ceramic DIP packages and plastic one-time program mable (OTP) packages.

DISTINCTIVE CHARACTERISTICS
■ Fast access time
   — Available in speed options as fast as 90 ns
■ Low power consumption
   — <10 µA typical CMOS standby current
■ JEDEC-approved pinout
   — Plug-in upgrade for 1 Mbit and 2 Mbit EPROMs
   — Easy upgrade from 28-pin JEDEC EPROMs
■ Single +5 V power supply
■ ±10% power supply tolerance standard
■ 100% Flashrite™ programming
   — Typical programming time of 1 minute
■ Latch-up protected to 100 mA from –1 V to VCC + 1 V
■ High noise immunity
■ Compact 32-pin DIP, PDIP, PLCC packages