Features

–100 µA Max Standby

– 30 mA Max Active at 5 MHz

– 32-lead PDIP

– 32-lead PLCC

– 32-lead TSOP

± 10% Supply

– 2000V ESD Protection

– 200 mA Latchup Immunity

1.

Description

The AT27C040 chip is a low-power, high-performance, 4,194,304-bit one-time pro-

grammable read-only memory (OTP EPROM) organized as 512K by 8 bits. The

AT27C040 requires only one 5V power supply in normal read mode operation. Any

byte can be accessed in less than 70 ns, eliminating the need for speed reducing

WAIT states on high-performance microprocessor systems.

Atmel’s scaled CMOS technology provides low active power consumption, and fast

programming. Power consumption is typically 8 mA in active mode and less than

10

µA in standby mode.

The AT27C040 is available in a choice of industry-standard JEDEC-approved one-

time programmable (OTP) plastic PDIP, PLCC and TSOP packages. The device fea-

tures two-line control (CE, OE) to eliminate bus contention in high-speed systems.

Atmel’s AT27C040 has additional features to ensure high quality and efficient produc-

tion use. The Rapid Programming Algorithm reduces the time required to program the

part and guarantees reliable programming. Programming time is typically only

100

µs/byte. The Integrated Product Identification Code electronically identifies the

device and manufacturer. This feature is used by industry-standard programming

equipment to select the proper programming algorithms and voltages.

4-Megabit

(512K x 8)

OTP EPROM

AT27C040

0189G–EPROM–05/05