AT27C520 Datasheet | Atmel

Features - 8-Bit Multiplexed Addresses/Outputs - Fast Read Access Time - 70 ns - Low Power CMOS Operation - - - - - - - - - - 20 m A max. Active at 5 MHz 20-Lead TSSOP Package 20-Lead SOIC Package 28-Lead TSOP Package 5V ± 10% Supply High Reliability CMOS Technology - 2,000V ESD Protection - 200 m A Latchup Immunity Rapid™ Programming Algorithm - 50 µs/byte (typical) CMOS and TTL patible Inputs and Outputs Integrated Product Identification Code mercial and Industrial Temperature Range Description The AT27C520 is a low-power, high performance 524,288 bit one-time programmable read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches for the 8 lower order address bits to multiplex with the 8 data bits. This minimizes system chip count, reduces cost, and simplifies the design of multiplexed bus systems. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 70 ns, eliminating the need for speed reducing WAIT states on high performance microprocessor systems. Atmel’s scaled CMOS technology provides high speed, lower active power consumption, and significantly faster programming. Power consumption is typically only 8 m A in Active Mode. The AT27C520 is available in 173 mil, 20-pin TSSOP; 300 mil, 20-pin SOIC; and 28pin TSOP, one-time programmable (OTP) plastic packages. (continued) 512K (64K x 8) Multiplexed Addresses/ Outputs OTP EPROM AT27C520 Pin Configurations Pin Name A8 - A15 AD0 - AD7 OE /VPP ALE Function Addresses Addresses/Outputs Output Enable/VPP Address Latch Enable TSOP Top View A10 NC NC A12 A14 ALE VCC OE/VPP A15 A13 A11 NC NC A9 22 23 24 25 26 27 28 1 2 3 4 5 6 7 21 20 19 18 17 16 15 14 13 12 11 10 9 8 A8 NC NC AD1 AD3 AD5 AD7 GND AD6 AD4 AD2 NC NC AD0 TSSOP Top View A10 A12 A14 ALE VCC OE/VPP A15 A13 A11 A9 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 A8 AD1 AD3 AD5 AD7 GND AD6 AD4 AD2 AD0 SOIC Top View OE/VPP A15 A13 A11 A9 AD0 AD2 AD4 AD6 GND 1 2 3 4 5 6 7 8 9 10 20 19 18...