MUX
Digital multiplexer
Selects one of several digital inputs for the documented output according to its selection controls.
Schematic
IEC · MUX
IEC multiplexer (MUX)
IEC MUX element whose select inputs, grouped with G dependency, pick which data input reaches the output.
In plain English
What does IEC multiplexer (MUX) mean?
The IEC multiplexer carries the MUX additional drawing mark. Select inputs are drawn with a binary grouping bracket producing G0 to Gn, and each data input is labelled with the matching number, so the data input whose number equals the select value is ANDed through to the output. An EN input, often active low, enables the whole element.
A simple example
Multiplexers on control drawings route one of several signals to a shared output, for example selecting a measurement channel or an operating mode source. The binary grouping makes the select range clear without drawing a decoder.
What the drawings help you do
The symbol does not state the switching time or whether outputs glitch during a select change. Those are device timing considerations.
This particular reference
IEC MUX element whose select inputs, grouped with G dependency, pick which data input reaches the output. The analogue multiplexer passes analogue levels through switches; the logic MUX passes logic states.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: Overview of IEEE Standard 91-1984: explanation of logic symbols (SDYZ001A) · SN74HC151 — digital multiplexing
IEC · Rectangular element with MUX qualifier and select inputs using G dependency
Qualifying-symbol and dependency conventions as explained in TI's public overview of IEEE Std 91-1984, which incorporates IEC 617-12 work. Independent educational drawing; not certified IEC geometry or an IEC database identifier. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · MUX
What it represents
The IEC multiplexer carries the MUX qualifier. Select inputs are drawn with a binary grouping bracket producing G0 to Gn, and each data input is labelled with the matching number, so the data input whose number equals the select value is ANDed through to the output. An EN input, often active low, enables the whole element.
Multiplexers on control drawings route one of several signals to a shared output, for example selecting a measurement channel or an operating mode source. The binary grouping makes the select range clear without drawing a decoder.
The symbol does not state the switching time or whether outputs glitch during a select change. Those are device timing considerations.
How to read it
- Read the binary grouping to find the select range.
- Each data input number matches a G value.
Information to show or reference
- Show select inputs with a binary grouping bracket.
- Number data inputs to match.
- Mark EN polarity.
A distinction that matters
The analogue multiplexer passes analogue levels through switches; the logic MUX passes logic states.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Overview of IEEE Standard 91-1984: explanation of logic symbols (SDYZ001A)
MUX qualifier, G dependency and binary grouping.
SN74HC151 — digital multiplexing
Digital multiplexer documentation.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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