# 8.5: 74153 Circuit Diagram

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The diagram for the 74153 input mirroring circuit is shown in Figure $$\PageIndex{1}$$. In this circuit, the LED outputs will match the two input switches. Figure $$\PageIndex{1}$$: 74153 circuit diagram

In this circuit there are two 1 bit 4-to-1 MUXes used. Each MUX has 4 inputs which are addressed by the two select bits at the bottom of the diagram. The select bits retrieve one output bit from each MUX, which are sent to the LEDs. Note that the output from this circuit will exactly follow the input switches, to show which input switch is on. In a real sense, the hard wired input to the two MUXes represent a type of sequential logic which is applied to the input to produce the output. We will use this method of implementing logic using a MUX in Chapter 10.

This page titled 8.5: 74153 Circuit Diagram is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Charles W. Kann III via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.