SN74AS158 - Texas Instruments

SN74AS158 Quadruple 1-of-2 Data Selectors/Multiplexers

These data selectors/multiplexers contain inverters and drivers to supply full data selection to the four output gates. A separate strobe (G) input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The ′ALS157A and SN74AS157 present true data. The ′ALS158 and SN74AS158 present inverted data to minimize propagati.

Features

57A, SN74ALS158, SN74AS157, SN74AS158 . . . 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 G 14 4A 13 4B 12 4Y 11 3A 10 3B 9 3Y SN54ALS157A, SN54ALS158 . . . FK PACKAGE (TOP VIEW) VCC G NC A/B 1A 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 3B 3Y NC GND 2Y NC − No internal connection FUNCTION TABLE INPUTS OUTPUT Y G A /B DATA AB ′ALS157A ′ALS158 SN74AS157 SN74AS158 HXXX L H LLLX L H L LHX H L L HX L L H LHXH H L PRODUCTION DATA information is current as of publication date. Pr.