# Multiplexers

**URL:** <https://boards.straightdope.com/t/multiplexers/215351>\
**Category:** Factual Questions\
**Created:** [November 26, 2003, 10:33am UTC](https://boards.straightdope.com/t/multiplexers/215351 "2003-11-26T10:33:18Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Algorithm](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/algorithm/32/12204_2.png) [@Algorithm](https://boards.straightdope.com/u/Algorithm)\
**Post date:** [November 26, 2003, 10:33am UTC](https://boards.straightdope.com/t/multiplexers/215351/1 "2003-11-26T10:33:18Z")

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I’m partial to the 74x153 myself.

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**Author:** ![Nanoda](https://avatars.discourse-cdn.com/v4/letter/n/ce73a5/32.png) [@Nanoda](https://boards.straightdope.com/u/Nanoda)\
**Post date:** [November 26, 2003, 10:36am UTC](https://boards.straightdope.com/t/multiplexers/215351/2 "2003-11-26T10:36:22Z")

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Indeedy. Aren’t they great?

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**Author:** ![LSLGuy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lslguy/32/5813_2.png) [@LSLGuy](https://boards.straightdope.com/u/LSLGuy)\
**Post date:** [November 26, 2003, 2:11pm UTC](https://boards.straightdope.com/t/multiplexers/215351/3 "2003-11-26T14:11:31Z")

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One is baffled.

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**Author:** ![FatBaldGuy](https://avatars.discourse-cdn.com/v4/letter/f/ecd19e/32.png) [@FatBaldGuy](https://boards.straightdope.com/u/FatBaldGuy)\
**Post date:** [November 26, 2003, 2:58pm UTC](https://boards.straightdope.com/t/multiplexers/215351/4 "2003-11-26T14:58:15Z")

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Two are baffled.

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**Author:** ![Q.E.D](https://avatars.discourse-cdn.com/v4/letter/q/51bf81/32.png) [@Q.E.D](https://boards.straightdope.com/u/Q.E.D)\
**Post date:** [November 26, 2003, 3:04pm UTC](https://boards.straightdope.com/t/multiplexers/215351/5 "2003-11-26T15:04:45Z")

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Was there a question here?

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**Author:** ![KP](https://avatars.discourse-cdn.com/v4/letter/k/a9adbd/32.png) [@KP](https://boards.straightdope.com/u/KP)\
**Post date:** [November 27, 2003, 12:21am UTC](https://boards.straightdope.com/t/multiplexers/215351/6 "2003-11-27T00:21:59Z")

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One Guy, Two Guy  
Nan- Guy, Q- Guy

What could be more _logical_?

If I understand correctly They’re talking about 74153 TTL chip (the x is for the specific logic family, like LS for Low Power Schottky, etc.) It’s a Dual 4-Line to 1-Line Data Selector/Multiplexer. Each multiplexer has 4 inputs. If you address one of the multiplexors with a binary number from 00 to 11, it will output the data from the corresponding input