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chips:74157 [2005/12/14 23:58] – Added useful table. nfgchips:74157 [2019/08/27 20:45] (current) – external edit 127.0.0.1
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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 · Last modified: 2019/08/27 20:45 by 127.0.0.1