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首页＞ATMEL 爱特梅尔＞EPROM存储器＞AT27BV020

ATMEL EPROM 存储器AT27BV020

AT27BV020 概述 The AT27BV020 is a high-performance, low-power, low-voltage, 2,097,152-bit, onetime programmable, read-only memory (OTP EPROM) organized as 256K 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 VCC = 2.7V, any byte can be accessed in less than 90 ns. With a typical power dissipation of only 18 mW at 5 MHz and VCC = 3V, the AT27BV020 consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is typically less than 1 μA at 3V. TheAT27BV020 simplifies system design and stretches battery lifetime even further by eliminating the need for power supply regulationThe AT27BV020 is available in industry-standard JEDEC approved one-time programmable(OTP) plastic PLCC, TSOP and VSOP packages, as well as a 42-ball,1 mm pitch. All devices feature two-line control (CE, OE) to give designers the flexibilityto prevent bus contention. The AT27BV020 operating with VCC at 3.0V produces TTL level outputs that are compatiblewith standard TTL logic devices operating at VCC = 5.0V. At VCC = 2.7V, the part is compatible with JEDEC approved low voltage battery operation (LVBO) interface 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.
Atmel's AT27BV020 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 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. The AT27BV020 programs exactly the same way as a standard 5V AT27C020
and uses the same programming equipment.

AT27BV020 特性

• Fast Read Access Time – 90 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 AT27C020
  • Low-power CMOS Operation
  – 20 μA Max (Less than 1 μA Typical) Standby for VCC = 3.6V
  – 29 mW Max Active at 5 MHz for VCC = 3.6V
  • Wide Selection of JEDEC Standard Packages
  – 32-lead PLCC
  – 32-lead TSOP
  – 32-lead VSOP
  • High Reliability CMOS Technology
  – 2,000V ESD Protection
  – 200 mA Latch-up 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

AT27BV020 订购型号