AT27BV040
Description
The AT27BV040 chip is a high performance, low power, low voltage, 4,194,304 bit
one-time programmable read only memory (EPROM) organized as 512K by 8 bits. It
requires only one supply in the range of 2.7 to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using either regulated or unregulated battery
power.
Atmel’s innovative design techniques provide fast speeds that rival 5V parts while
keeping the low power consumption of a 3V supply. At V
CC
= 2.7V, any byte can be
accessed in less than 100 ns. With a typical power dissipation of only 18 mW at 5
MHz and V
CC
= 3V, the AT27BV040 consumes less than one fifth the power of a
standard 5V EPROM. Standby mode supply current is typically less than 1 µA at 3V.
The AT27BV040 simplifies system design and stretches battery lifetime even further
by eliminating the need for power supply regulation.
(continued)
Pin Configurations
Pin Name Function
A0 - A18 Addresses
O0 - O7 Outputs
CE Chip Enable
OE Output Enable
4 Megabit
(512K x 8)
Unregulated
Battery-Voltage

High Speed
OTP
CMOS EPROM
PLCC Top View
Features
•
Fast Read Access Time - 120 ns
•
Dual Voltage Range Operation
Unregulated Battery Power Supply Range, 2.7V to 3.6V
or Standard 5V ± 10% Supply Range
•
Compatible with JEDEC Standard AT27C040
•
Low Power CMOS Operation
20 µA max. (less than 1 µA typical) Standby for V
CC
= 3.6V
29 mW max. Active at 5 MHz for V
CC
= 3.6V
•
JEDEC Standard Packages
32-Lead PLCC
32-Lead TSOP
•
High Reliability CMOS Technology
2,000V ESD Protection
200 mA Latchup Immunity
•
Rapid

Programming Algorithm - 100 µs/byte (typical)
•
CMOS and TTL Compatible Inputs and Outputs
JEDEC Standard for LVTTL and LVBO
•
Integrated Product Identification Code
•
Commercial and Industrial Temperature Ranges
TSOP Top View
Type 1
0346C
AT27BV040
3-53