Features
•
Fast Read Access Time – 70 ns
•
Low Power CMOS Operation
– 100 µA Max Standby
– 30 mA Max Active at 5 MHz
JEDEC Standard Packages
– 32-lead PDIP
– 32-lead PLCC
– 32-lead TSOP
5V
±
10% Supply
High Reliability CMOS Technology
– 2000V ESD Protection
– 200 mA Latchup Immunity
Rapid Programming Algorithm – 100 µs/Byte (Typical)
CMOS and TTL Compatible Inputs and Outputs
Industrial Temperature Range
Green (Pb/Halide-free) Packaging Option
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4-Megabit
(512K x 8)
OTP EPROM
AT27C040
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.
0189G–EPROM–05/05
ATMEL [ ATMEL CORPORATION ]
