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Features
? Fast read access time – 70ns
? Dual voltage range operation
– Unregulated battery power supply range, 2.7V to 3.6V, or
– Standard power supply range, 5V ? 10%
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?
Pin compatible with JEDEC standard Atmel ? AT27C256R
Low-power CMOS operation
– 20μA max standby (less than 1μA, typical) for V CC = 3.6V
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– 29mW max active at 5MHz for V CC = 3.6V
JEDEC standard surface mount package
– 32-lead PLCC
High-reliability CMOS technology
– 2,000V ESD protection
– 200mA latchup immunity
Rapid programming algorithm – 100μs/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, One-time
Programmable,
Read-only Memory
Atmel AT27BV256
1.
Description
The Atmel 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, mak-
ing it ideal for fast, portable systems using either regulated or unregulated battery power.
The Atmel innovative design techniques provide fast speeds that rival 5V parts, while keep-
ing the low power consumption of a 3V supply. At V CC = 2.7V, any word can be accessed in
less than 70ns. With a typical power dissipation of only 18mW 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 1μA 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 an industry-standard, JEDEC-approved ,one-time program-
mable (OTP) PLCC package. 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 compatible
with standard TTL logic devices operating at V CC = 5.0V. At V CC = 2.7V, the part is compati-
ble with JEDEC-approved, low-voltage battery operation (LVBO) interface specifications.
The device is also capable of standard, 5V operation, making it ideally suited for dual supply
range systems or card products that are pluggable in both 3V and 5V hosts.
The 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 guar-
antees reliable programming. Programming time is typically only 100μs/byte. The
integrated product identification code electronically identifies the device and manufacturer.
0601F–EPROM–4/11
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相关代理商/技术参数
AT27BV256-70JU SL383 制造商:Atmel Corporation 功能描述:EPROM OTP 256K-Bit 32K x 8 70ns 32-Pin PLCC
AT27BV256-70JU-T 功能描述:IC OTP 256KBIT 70NS 32PLCC 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:在售 存储器类型:非易失 存储器格式:EPROM 技术:EPROM - OTP 存储容量:256Kb （32K x 8） 写周期时间 - 字，页:- 访问时间:70ns 存储器接口:并联 电压 - 电源:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C（TC） 安装类型:表面贴装 封装/外壳:32-LCC（J 形引线） 供应商器件封装:32-PLCC（11.43x13.97） 标准包装:1
AT27BV256-70RC 功能描述:IC OTP 256KBIT 70NS 28SOIC RoHS:否 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:32 系列:- 格式 - 存储器:闪存 存储器类型:FLASH 存储容量:1M (128K x 8) 速度:120ns 接口:并联 电源电压:2.7 V ~ 3.6 V 工作温度:0°C ~ 70°C 封装/外壳:32-LCC（J 形引线） 供应商设备封装:32-PLCC 包装:管件 其它名称:AT49BV00112JC
AT27BV256-70RI 功能描述:可擦除可编程ROM 1Mb (64Kx16) OTP 2.7-3.6V 70ns RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92
AT27BV256-70RU 功能描述:可擦除可编程ROM 1Mb (64Kx16) OTP 2.7-3.6V 70ns RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92
AT27BV256-70TC 功能描述:IC OTP 256KBIT 70NS 28TSOP RoHS:否 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:32 系列:- 格式 - 存储器:闪存 存储器类型:FLASH 存储容量:1M (128K x 8) 速度:120ns 接口:并联 电源电压:2.7 V ~ 3.6 V 工作温度:0°C ~ 70°C 封装/外壳:32-LCC（J 形引线） 供应商设备封装:32-PLCC 包装:管件 其它名称:AT49BV00112JC
AT27BV256-70TI 功能描述:可擦除可编程ROM 1Mb (64Kx16) OTP 2.7-3.6V 70ns RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92
AT27BV256-70TU 功能描述:可擦除可编程ROM 1Mb (64Kx16) OTP 2.7-3.6V 70ns RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92