Atmel AT27C040
4Mb (512K x 8) OTP, EPROM
DATASHEET
Features
Fast read access time – 70ns
Low-power CMOS operation
100μA max standby
30mA max active at 5MHz
JEDEC standard packages
32-lead PDIP
32-lead PLCC
5V 10% supply
High-reliability CMOS technology
2000V ESD protection
200mA latchup immunity
Rapid programming algorithm – 100μs/byte (typical)
CMOS- and TTL-compatible inputs and outputs
Industrial temperature range
Green (Pb/halide-free) packaging option
1.
Description
The Atmel® AT27C040 is a low-power, high-performance, 4,194,304-bit, One-Time
Programmable, 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 70ns, eliminating the need for speed reducing wait
states on high-performance microprocessor systems.
The Atmel scaled CMOS technology provides low active power consumption and fast
programming. Power consumption is typically 8mA in active mode and less than 10μA
in standby mode.
The AT27C040 is available in a choice of industry standard, JEDEC-approved, PDIP
and PLCC packages. The device features two-line control (CE, OE) to eliminate bus
contention in high-speed systems.
The AT27C040 has additional features to ensure high quality and efficient production
use. The rapid programming algorithm reduces the time required to program the part
and guarantees reliable programming. Programming time is typically only 100μs/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.
0189J–EPROM–10/2012
