7402 Datasheet – Quad NOR Gate (TTL, DIP14)

This is one of the TTL types.

Part Number : 7402

Function : QUAD 2-INPUT NOR GATE

Package : DIP 14 Pin

Manufacturers : Fairchild,  ON Semiconductor

See the preview image and the PDF file for more information.

Image

7402 datasheet
Description :

These devices contain four independent 2-input NOR Gates.

1. Voltage – Supply 4.75V ~ 5.25V
2. Current – Output High, Low 400µA, 8mA
3. Logic Level – Low 0.8V
4. Logic Level – High 2V
5. Max Propagation Delay @ V, Max CL 15ns @ 5V, 15pF
6. Operating Temperature 0°C ~ 70°C

Function Table ( Truth Table )

A  B  Y

H  X  L

X  H  L

L   L  H

7402 pinout

7402 pinout

Other data sheets within the file : DM74LS02, SN74LS02D, SN74LS02DR2, 74LS02

7402 Datasheet

7402 pdf

7408 Datasheet – Quad 2-Input AND Gates – DM7408

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

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

7408 Datasheet

7408 Datasheet