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SN54ALS253FK Datasheet(PDF) 1 Page - Texas Instruments |
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SN54ALS253FK Datasheet(HTML) 1 Page - Texas Instruments |
1 / 7 page SN54ALS253, SN74ALS253, SN74AS253A DUAL 1-OF-4 DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS216A – APRIL 1982 – REVISED DECEMBER 1994 Copyright © 1994, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • 3-State Versions of the ′ALS153 and SN74AS153 • Permits Multiplexing From n Lines to One Line • Performs Parallel-to-Serial Conversion • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These data selectors/multiplexers contain inverters and drivers to supply full binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two 4-line sections. The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low logic level. Each output has its own output-enable (OE) input. The output is disabled when OE is high. The SN54ALS253 is characterized for operation over the full military temperature range of – 55 °C to 125 °C. The SN74ALS253 and SN74AS253A are characterized for operation from 0 °C to 70°C. FUNCTION TABLE INPUTS OUTPUT SELECT† DATA OE OUTPUT Y B A C0 C1 C2 C3 OE Y X X X X X X H Z L LL XX X L L L LH XX X L H L HX LX XL L L HX HX X L H H LX XL XL L H LX XHX L H H HX XX L L L H H X X X H L H † Select inputs A and B are common to both sections. SN54ALS253 ...J PACKAGE SN74ALS253, SN74AS253A ...D OR N PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 A 2C3 NC 2C2 2C1 1C3 1C2 NC 1C1 1C0 SN54ALS253 . . . FK PACKAGE (TOP VIEW) NC – No internal connection 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 1OE B 1C3 1C2 1C1 1C0 1Y GND VCC 2OE A 2C3 2C2 2C1 2C0 2Y 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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