AT27BV256 256Kbit, OTP EPROM存储器

256K bit, 2.7-Volt to 3.6-Volt EPROM

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 VCC = 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 VCC = 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 simplifies 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 VCC at 3.0V produces TTL level outputs that are compatible with 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 AT27BV256 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 AT27BV256 programs exactly the same way as a standard 5V AT27C256R and uses the same programming equipment.

AT27BV256 特性

• 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 VCC = 3.6V
  – 29 mW Max Active at 5 MHz for VCC = 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

AT27BV256 订购型号

AT27BV256 技术支持：

1. ATMEL 爱特梅尔EPROM 存储器AT27BV256 数据手册DataSheet 下载. PDF（PDF 文件格式完整版）
2. EPROM 产品选型指南（ Excel 文档格式）
3. ATMEL 爱特梅尔公司全线产品目录. pdf
4. AT27BV256 Reliability Qualification Report (Qualification, 7 pages, updated 10/03). pdf