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chips:74157 [2005/12/15 00:58]
nfg Added useful table.
chips:74157 [2008/07/04 16:14] (current)
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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. 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.
  
-{{chips:​74157.png?nocache }}+{{chips:​74157.gif?nocache }}
 ^ IC 1 ^^^^ ^ IC 1 ^^^^
 ^ Pin ^ Function ^ Function ^ Pin ^ ^ Pin ^ Function ^ Function ^ Pin ^
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 |  7 | 2Y  |  3B | 10 |  |  7 | 2Y  |  3B | 10 | 
 |  8 | Gnd  |  3Y | 9  |  |  8 | Gnd  |  3Y | 9  | 
 +
 +==== Uses ====
 +  * [[controls:​megadrive_genesis_controller_3|Genesis/​MD 3-button controller]]
 +  * [[controls:​pc_engine_controller|PC Engine/​TurboGrafx 16 controller]]
 +  * [[http://​www.gamesx.com/​importmod/​sat_switchless.htm|Saturn switchless import mod]]
  
  
-** UNFINISHED! ** 
 
 chips/74157.txt ยท Last modified: 2008/07/04 16:14 (external edit)
 
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