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
– 36 mW Max Active at 5 MHz for V
CC
= 3.6V
• JEDEC Standard Packages
– 32-lead PLCC
– 32-lead TSOP
– 32-lead VSOP
• 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
• Industrial Temperature Range
• Green (Pb/Halide-free/RoHS Compliant) Packaging
1. 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.
The AT27BV040 is available in industry-standard JEDEC-approved one-time pro-
grammable (OTP) plastic PLCC, TSOP, and VSOP packages. All devices feature two-
line control (CE
, OE) to give designers the flexibility to prevent bus contention.
The AT27BV040 operating with V
CC
at 3.0V produces TTL level outputs that are com-
patible with standard TTL logic devices operating at V
CC
= 5.0V. At V
CC
= 2.7V, the
part is compatible with JEDEC approved low voltage battery operation (LVBO) inter-
face specifications. The device is also capable of standard 5-volt operation making it
ideally suited for dual supply range systems or card products that are pluggable in
both 3-volt and 5-volt hosts.
4-Megabit
(512K x 8)
Unregulated
Battery-Voltage
High-Speed
OTP EPROM
AT27BV040
0346G–EPROM–12/07
