74157: Difference between revisions
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(Created page with "The '''74157''' (variants 74LS32, 74HC157) is a 74-series logic IC with four independent 2-input multiplexers. == 7432 Pinout == <pre> .--\/--. S - |01 16| - +5V 1I0 ...") |
(they're not so "independent" if they share one select line) |
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The '''74157''' (variants | The '''74157''' (variants 74LS157, 74HC157) is a 74-series logic IC with four 2-input multiplexers sharing a single select line. | ||
== | == 74157 Pinout == | ||
<pre> | <pre> | ||
.--\/--. | .--\/--. | ||
Revision as of 22:32, 13 July 2012
The 74157 (variants 74LS157, 74HC157) is a 74-series logic IC with four 2-input multiplexers sharing a single select line.
74157 Pinout
.--\/--.
S - |01 16| - +5V
1I0 - |02 15| - /E
1I1 - |03 14| - 4I0
1Y - |04 13| - 4I1
2I0 - |05 12| - 4Y
2I1 - |06 11| - 3I0
2Y - |07 10| - 3I1
Gnd - |08 09| - 3Y
`------'
Signal descriptions
If /E is high, then all 4 Y output pins output as low, otherwise, if S is low, for each set of pins starting with the same number, Y is equal to I0, otherwise, if S is high, then Y is equal to I1.
