SN54ALS258A

SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With System Bus D Provide Bus Interface From Multiple Sources in High-Performance Systems D 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 are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level. SN54ALS257A, SN54ALS258A . . . J PACKAGE SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 . . . D OR N PACKAGE (TOP VIEW) A/B 1 1A 2 1B 3 1Y 4 2A 5 2B 6 2Y 7 GND 8 16 VCC 15 OE 14 4A 13 4B 12 4Y 11 3A 10 3B 9 3Y SN54ALS257A, SN54ALS258A . . . FK PACKAGE (TOP VIEW) 1A A/B NC VCC OE The SN54ALS257A and SN54ALS258A are characterized for operation over the full military temperature range of −55°C to 125°C. The SN74ALS257A, SN74ALS258A, SN74AS257, and SN74AS258 are characterized for operation from 0°C to 70°C. 1B 3 2 1 20 19 4 18 4A 1Y 5 17 4B NC 6 16 NC 2A 7 15 4Y 2B 8 14 3A 9 10 11 12 13 2Y GND NC 3Y 3B NC − No internal connection FUNCTION TABLE INPUTS OUTPUT Y OE A /B DATA AB SN54ALS257A SN74ALS257A SN74AS257 SN54ALS258A SN74ALS258A SN74AS2...