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SN74ALS22B 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74ALS22B 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 3 page SN54ALS22B, SN74ALS22B DUAL 4-INPUT POSITIVE-NAND GATES WITH OPEN-COLLECTOR OUTPUTS SDAS005A – MARCH 1984 – 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 two independent 4-input NAND gates. They perform the Boolean functions Y = A •B•C•D or Y = A+B+C+D in positive logic. The open-collector outputs require pullup resistors to perform correctly. They may be connected to other open-collector outputs to implement active-low wired-OR or active-high wired-AND functions. Open-collector devices are often used to generate higher VOH levels. The SN54ALS22B is characterized for operation over the full military temperature range of 55 °C to 125 °C. The SN74ALS22B is 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 XXX H X LX X H X XLX H X X X L H logic symbol† 2D 13 12 2C & 8 2Y 6 1Y 2B 10 2A 9 1D 5 1C 4 2 1B 1A 1 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for D, J, and N packages. 1Y 1D 1A 1B 1C 2C 2B 2A 2D 2Y logic diagram (positive logic) 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 SN54ALS22B ...J PACKAGE SN74ALS22B ...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 2C NC NC NC 2B NC NC 1C NC 1D SN54ALS22B . . . 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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