chips:74157
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chips:74157 [2005/11/15 21:26] – created nfg | chips:74157 [2019/08/27 20:45] (current) – external edit 127.0.0.1 | ||
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===== 74157 IC ===== | ===== 74157 IC ===== | ||
- | The 74157 is a quad 2-line to 1-line multiplexer. Basically how this works is there are two inputs ( A and B ) for every output ( Y ). There are four groups like this, with two inputs and one output. There is one select signal for the whole chip. When the select signal is low, the output ( Y ) is the same as input A. When the select signal is high, the output Y is the same as input B. | + | The 74157 is a quad 2-line to 1-line multiplexer. Basically how this works is there are two inputs ( A and B ) for every output ( Y ). There are four groups like this, with two inputs and one output |
- | {{ chips:ic-74157.png}} | + | {{chips: |
+ | ^ IC 1 ^^^^ | ||
^ Pin ^ Function ^ Function ^ Pin ^ | ^ Pin ^ Function ^ Function ^ Pin ^ | ||
- | | | + | | 1 | Select |
- | | | + | | 2 | 1A | |
- | | | + | | 3 | 1B | 4A | 14 | |
- | | | + | | 4 | 1Y | 4B | 13 | |
- | | | + | | 5 | 2A | 4Y | 12 | |
- | | | + | | 6 | 2B | 3A | 11 | |
- | | | + | | 7 | 2Y | 3B | 10 | |
- | | | + | | 8 | Gnd |
+ | |||
+ | ==== Uses ==== | ||
+ | * [[controls: | ||
+ | * [[controls: | ||
+ | * [[http:// | ||
+ |
chips/74157.1132054019.txt.gz · Last modified: 2019/08/27 20:44 (external edit)