The Integrated Circuit 74157 is a Quad Dual Input Multiplexer in a 16-Pin Package (DIL / SMD)
Similiar Devices / Second Source
74F157
74ALS157
74LS157
74HC157
74HCT157
74LVX157

Here you may find Schematic Diagram for DIY, Datasheet, Pinout as well as further Information on the Integrated Circuit 74157

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