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SN74AS20D 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74AS20D 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 6 page SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20 DUAL 4-INPUT POSITIVE-NAND GATES SDAS192B – APRIL 1982 – REVISED DECEMBER 1994 Copyright © 1994, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These devices contain two independent 4-input positive-NAND gates. They perform the Boolean functions Y = A • B • C • D or Y = A + B + C + D in positive logic. The SN54ALS20A and SN54AS20 are characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74ALS20A and SN74AS20 are characterized for operation from 0 °C to 70°C. FUNCTION TABLE (each gate) INPUTS OUTPUT A B C D Y H H H H L L XX X H X LX X H X XL X H X X X L H logic symbol† logic diagram (positive logic) & 1Y 6 2Y 8 1 1A 2 1B 4 1C 5 1D 9 2A 10 2B 12 2C 13 2D 1Y 1D 1A 1B 1C 2C 2B 2A 2D 2Y 1 2 4 5 9 10 12 13 6 8 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. SN54ALS20A, SN54AS20 ...J PACKAGE SN74ALS20A, SN74AS20 ...D OR N PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1A 1B NC 1C 1D 1Y GND VCC 2D 2C NC 2B 2A 2Y SN54ALS20A, SN54AS20 . . . FK PACKAGE (TOP VIEW) 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 2C NC NC NC 2B NC NC 1C NC 1D 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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