If, like I did, you swiped a bunch of 7400 chips from your first lab course in
digital logic (for the countless hours spent hunched over those damned circuits, you deserve more than just a lousy grade, dammit), they're probably sitting around somewhere, not being used. Why? Because you don't remember all the pin-outs for those worthless things any more than you remember what the four types of
flip-flops are. Of course, if you had some kind of
handy reference, you could use these chips to build all kinds of useful logic circuits; like one that could turn on the hard drive
LED on your tower when the last digit of your digital clock is a
7.
So without further ado, here are the pin-outs for various 7400 TTL chips:
Legend:
-,| = single wire
= = two or more wires
G = logic gate
7400 - quad 2-input NAND
7402 - quad 2-input NOR
7408 - quad 2-input AND
7432 - quad 2-input OR
7486 - quad 2-input XOR
gnd
14 12 10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
| | | | | | | |
| --=G- --=G- |
| --=G- --=G- |
| | | | | | | |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V
7404 - Hex Inverter
gnd
14 12 10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
| | | | | | | |
| -G- -G- -G- |
| -G- -G- -G- |
| | | | | | | |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V
7410 - Triple 3-input NAND
7411 - Triple 3-input AND
gnd
14 12 10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
| | | | | | | |
| --=G- --===G- |
| | | --===G- |
| | | | | | | |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V
gnd
14 12 10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
| |
| |
| | | | |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V
Under Construction... fuckin <pre> tag is a pain in the ass