AT27BV256_07 Datasheet, PDF (1/15 Pages) ATMEL Corporation – 256K (32K x 8) Unregulated Battery-Voltage High-Speed OTP EPROM

Features
• Fast Read Access Time – 70 ns
• Dual Voltage Range Operation
– Unregulated Battery Power Supply Range, 2.7V to 3.6V
or Standard 5V ± 10% Supply Range
• Pin Compatible with JEDEC Standard AT27C256R
• 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 Surface Mount Packages
– 32-lead PLCC
– 28-lead SOIC
– 28-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
• Industrial Temperature Range
• Green (Pb/Halide-free) Packaging Option
256K (32K x 8)
Unregulated
Battery-Voltage
High-Speed
OTP EPROM
AT27BV256
1. Description
The AT27BV256 is a high-performance, low-power, low-voltage 262,144-bit one-time
programmable read-only memory (OTP EPROM) organized as 32K by 8 bits. It
requires only one supply in the range of 2.7V 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 word can be
accessed in less than 70 ns. With a typical power dissipation of only 18 mW at 5 MHz
and V_CC = 3V, the AT27BV256 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 AT27BV256 simpli-
fies system design and stretches battery lifetime even further by eliminating the need
for power supply regulation.
The AT27BV256 is available in industry-standard JEDEC-approved one-time
programmable (OTP) plastic PLCC, SOIC and TSOP packages. All devices feature
two-line control (CE, OE) to give designers the flexibility to prevent bus contention.
The AT27BV256 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.
0601E–EPROM–12/07