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Features
? 8-bit Multiplexed Addresses/Outputs
? Fast Read Access Time – 70 ns
? Dual Voltage Range Operation
– Low-voltage Power Supply Range, 3.0V to 3.6V, or
– Standard 5V ± 10% Supply Range
?
?
Pin Compatible with Standard AT27C520
Low-power CMOS Operation
– 20 μA Max Standby for ALE = V IH and V CC = 3.6V
– 29 mW Max Active at 5 MHz for V CC = 3.6V
512K (64K x 8)
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JEDEC Standard Packages
– 20-lead TSSOP
– 20-lead SOIC
High-reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latch-up Immunity
Rapid Programming Algorithm – 50 μs/Byte (Typical)
CMOS- and TTL-compatible Inputs and Outputs
– JEDEC Standard for LVTTL
Integrated Product Identification Code
Industrial Temperature Range
Green (Pb/Halide-free) Packaging Option
Multiplexed
Addresses/
Outputs
Low-voltage
OTP EPROM
AT27LV520
1. Description
The AT27LV520 is a low-power, high-performance, 524,288-bit one-time programma-
ble read-only memory (OTP EPROM) organized 64K by eight bits. It incorporates
Not Recommended
for New Designs.
latches for the eight lower order address bits to multiplex with the eight data bits. This
minimizes system chip count, reduces cost, and simplifies the design of multiplexed
bus systems. It requires only one power supply in the range of 3.0V to 3.6V for normal
read mode operation, making it ideal for fast, portable systems using battery power.
Any byte can be accessed in less than 70 ns.
The AT27LV520 is available in 20-lead TSSOP and 20-lead SOIC, one-time program-
mable (OTP) plastic packages.
Atmel’s innovative design techniques provide fast speeds that rival 5V parts while
keeping the low power consumption of a 3.3V supply. At V CC = 3.0V, any byte can be
accessed in less than 70 ns. With a typical power dissipation of only 18 mW at 5 MHz
and V CC = 3.3V, the AT27LV520 consumes less than one fifth the power of a standard
5V EPROM. Standby mode is achieved by asserting ALE high. Standby mode supply
current is typically less than 1 μA at 3.3V.
The AT27LV520 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. 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.
0911G–EPROM–8/07
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相关代理商/技术参数
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AT-28.63636MAGK-T 功能描述:28.63636MHz ±30ppm 晶体 20pF 50 欧姆 -40°C ~ 85°C AEC-Q200 表面贴装 HC49/US 制造商:txc corporation 系列:AT 包装:带卷（TR） 零件状态:有效 类型:MHz 晶体 频率:28.63636MHz 频率稳定度:±50ppm 频率容差:±30ppm 负载电容:20pF ESR（等效串联电阻）:50 欧姆 工作模式:基谐 工作温度:-40°C ~ 85°C 等级:AEC-Q200 安装类型:表面贴装 封装/外壳:HC49/US 大小/尺寸:0.449" 长 x 0.189" 宽（11.40mm x 4.80mm） 高度:0.161"（4.10mm） 标准包装:1,000
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