2-to-1 Multiplexer Circuit

2-to-1 Multiplexer

A 2-to-1 multiplexer routes one of two inputs to a single output. The select signal determines whether Y follows I0 or I1. This small circuit is a useful starting point for understanding bus selection, signal routing and Boolean logic implementation. The drawing labels each signal separately so the many-to-one relationship is apparent without showing a gate-level implementation. Larger multiplexers use the same idea with more inputs and additional select bits. Include an enable pin when the selected output must also be controlled by a separate signal.

類型 電路圖標準 IEEE Std 315 / ANSI Y32.2引擎 schematex-circuit更新時間 2026/9/24

需求

“Draw a 5 V 2-to-1 multiplexer with I0 and I1 data inputs, a select input S, and output Y with a 10 kΩ load to ground.”

接著試試Change I0 to a 5 V input.Add an enable input.

這張圖裡有什麼

看懂背後的決策。

01Two data inputs

I0 and I1 are the sources to select.

02Select line

S determines which input reaches Y.

03Single output

Y carries the selected logic value.

Use this for a basic data-routing or logic-selection circuit.

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常見問題

What does a 2-to-1 multiplexer do?

It selects either I0 or I1 and routes the selected input to Y.

How many select lines does it need?

One select line is enough to choose between two inputs.

Is a multiplexer a logic gate?

It is a combinational logic device that can also be used to implement Boolean functions.