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AT27C520-90XI Datasheet(PDF) 1 Page - ATMEL Corporation |
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AT27C520-90XI Datasheet(HTML) 1 Page - ATMEL Corporation |
1 / 10 page 1 512K (64K x 8) Multiplexed Addresses/ Outputs OTP EPROM AT27C520 Features • 8-Bit Multiplexed Addresses/Outputs • Fast Read Access Time - 70 ns • Low Power CMOS Operation – 20 mA 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 mA Latchup Immunity • Rapid™ Programming Algorithm - 50 µµµµs/byte (typical) • CMOS and TTL Compatible Inputs and Outputs • Integrated Product Identification Code • Commercial 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 consump- tion, and significantly faster programming. Power consumption is typically only 8 mA in Active Mode. The AT27C520 is available in 173 mil, 20-pin TSSOP; 300 mil, 20-pin SOIC; and 28- pin TSOP, one-time programmable (OTP) plastic packages. Rev. 0752C-C–01/98 Pin Configurations Pin Name Function A8 - A15 Addresses AD0 - AD7 Addresses/Outputs OE /V PP Output Enable/V PP ALE Address Latch Enable SOIC Top View 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 OE/VPP A15 A13 A11 A9 AD0 AD2 AD4 AD6 GND VCC ALE A14 A12 A10 A8 AD1 AD3 AD5 AD7 (continued) TSOP Top View 22 23 24 25 26 27 2 3 4 5 6 7 21 20 19 18 17 16 15 14 13 12 11 10 9 8 A10 NC NC A12 A14 ALE VCC OE/VPP A15 A13 A11 NC NC A9 A8 NC NC AD1 AD3 AD5 AD7 GND AD6 AD4 AD2 NC NC AD0 28 1 TSSOP Top View 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 A10 A12 A14 ALE VCC OE/VPP A15 A13 A11 A9 A8 AD1 AD3 AD5 AD7 GND AD6 AD4 AD2 AD0 |
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