chips:74157
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— | chips:74157 [2019/08/27 20:45] (current) – external edit 127.0.0.1 | ||
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+ | ===== 74157 IC ===== | ||
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+ | 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 each. 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. | ||
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+ | {{chips: | ||
+ | ^ IC 1 ^^^^ | ||
+ | ^ Pin ^ Function ^ Function ^ Pin ^ | ||
+ | | 1 | Select | ||
+ | | 2 | 1A | CE | 15 | | ||
+ | | 3 | 1B | 4A | 14 | | ||
+ | | 4 | 1Y | 4B | 13 | | ||
+ | | 5 | 2A | 4Y | 12 | | ||
+ | | 6 | 2B | 3A | 11 | | ||
+ | | 7 | 2Y | 3B | 10 | | ||
+ | | 8 | Gnd | 3Y | 9 | | ||
+ | |||
+ | ==== Uses ==== | ||
+ | * [[controls: | ||
+ | * [[controls: | ||
+ | * [[http:// | ||
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