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SN54ALS28A Datasheet(PDF) 1 Page - Texas Instruments |
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SN54ALS28A Datasheet(HTML) 1 Page - Texas Instruments |
1 / 3 page SN54ALS28A, SN74ALS28A QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS SDAS193 – D2661, APRIL 1982 – REVISED MAY 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Copyright © 1986, Texas Instruments Incorporated 5BASIC 1 • Package Options Include Plastic Small Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs • Dependable Texas Instruments Quality and Reliability description These devices contain four independent 2-input NOR buffer gates. They perform the Boolean functions Y = A+B or Y = A •B in positive logic. The SN54ALS28A is characterized for operation over the full military temperature range of – 55 °C to 125 °C. The SN74ALS28A is characterized for operation from 0 °C to 70°C. FUNCTION TABLE (each gate) INPUTS OUTPUT A B Y H X L X HL L L H logic symbol† ≥1 13 4Y 10 3Y 4 2Y 1Y 1 4B 12 4A 11 3B 9 3A 8 2B 6 2A 5 3 1B 1A 2 † This symbol is in accordance with ANSI/IEEE Std –1984 and IEC Publication 617-12. Pin numbers shown are for D, J, and N packages. 4A 4B 4Y 3A 3B 3Y 2A 2B 2Y 1Y 1B 1A logic diagram (positive logic) 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1Y 1A 1B 2Y 2A 2B GND VCC 4Y 4B 4A 3Y 3B 3A SN54ALS28A ...J PACKAGE SN74ALS28A ...D OR N PACKAGE (TOP VIEW) 3 2 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 4B NC 4A NC 3Y 1B NC 2Y NC 2A SN54ALS28A . . . FK PACKAGE (TOP VIEW) NC – No internal connection PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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