This post explains for the TTL IC.
Part Number : 7408, DM7408
Function : Quad 2-Input AND Gates
Package : DIP, SOP 14 Pin Type
Manufactures : Fairchild
See the preview image and the 7408 Datasheet file for more information.
7408 Pinout
Description :
This device contains four independent gates each of which performs the logic AND function.
Fuction Table ( Y= AB )
A B Y
L L L
L H L
H L L
H H H
Recommended Operating Conditions
1. VCC : Supply Voltage = 4.75 5 5.25 V
2. VIH : HIGH Level Input Voltage = 2 V
3. VIL : LOW Level Input Voltage = 0.8 V
4. IOH : HIGH Level Output Current = −0.8 mA
5. IOL : LOW Level Output Current = 16 mA
6. TA : Free Air Operating Temperature = 0 70 °C
Absolute Maximum Ratings
