Am27LS02/Am27LS03 64-Bit Low- Power Inverting- Output Bipolar RAM
■The Am27LS02 and Am27LS03 are 64-bit RAMs built using Schottky diode clamped transistors in conjunction with internal ECL circuitry and are ideal for use in scratch pad I high-speed buffer memory applications. Each memory is organized as a fully decoded 16-word memory of 4 bits word. Easy memory expansion is provided by an active LOW chip select (CS) input and open-collector OR tieable puts (Am27LS02) or three-state outputs (Am27LS03).
■An active LOW Write line (WE) controls the writing/reading operation of the memory. When the chip select and write lines are LOW the information on the four data inputs D-0 to D₃ fs written into the addressed memory word and preconditions the output circuitry so that correct data is present at the outputs when the write cycle is complete. This preconditioning operation insures minimum write recovery times by eliminating the "write recovery glitch."
■Reading is performed with the chip select line LOW and the write line HIGH. The information stored in the addressed word is read out on the four inverting outputs O-0 to O₃.
■During the writing operation or when the chip select line is HIGH the four outputs of the memory go to an inactive high-impedance state.
●DISTINCTIVE CHARACTERISTICS:
■Fully decoded 16 word x 4-bit low-power Schottky RAMs;
■Low Power;
■Internal ECL circuitry for optimum speed/power performance over voltage and ■temperature;
■Output preconditioned during write to eliminate write recovery glitch;
■Available .with open-collector outputs (Am27LS02) or with three-state outputs (Am27LS03);
■Pin-compatible replacements for 74LS289, (use Am27LS02); for 74LS189, (use Am27LS03).
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Am27LS02 、 Am27LS03 、 Am27LS02-25 、 Am27LS03-25 、 Am27LS03-30 、 Am27LS03-55 、 Am27LS03-65 、 Am27LS02-30 、 Am27LS02-55 、 Am27LS02-65 、 Am27LS02-25PCB 、 Am27LS03-30/BEA |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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January 1987 |
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Rev. B |
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08062 |
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545 KB |
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