View source for 7400 (Integrated circuit)

{{DISPLAYTITLE:7400}}
{{Infobox electronic component
| name = 7400
| image = 7400-Circuit-Diagram.svg
| caption = 7400 Integrated circuit diagram
| pins = 14 Standard, 8 and 20-pin variants
|type=Logic gate}}
{| class="wikitable" style="text-align:center; clear: right; float: right"
|-
! colspan="3" | NAND gate [[truth table]]
|- bgcolor="#ddeeff"
|colspan=2|'''Input''' || '''Output'''
|- bgcolor="#ddeeff"
| A || B || A NAND B
|-
|{{no2|0}} || {{no2|0}} || {{yes2|1}}
|-
|{{no2|0}} || {{yes2|1}} || {{yes2|1}}
|-
|{{yes2|1}} || {{no2|0}} || {{yes2|1}}
|-
|{{yes2|1}} || {{yes2|1}} || {{no2|0}}
|}
The '''7400''' [[Integrated circuit]] is a TTL '''Quad 2-Input''' [[NAND gate]], complementing the [[CMOS]] equivalent, the [[4011 (Integrated circuit)|4011]]. The 7400 is a commonly used chip in the world of discreet integrated circuits, as it can be used to build any alternative of the logic gates.

These devices contain four (except in the case of the SO package, where two are only present) independent 2-input NAND gates. They perform the Boolean function <math>Y = \overline{A \cdot B}</math> in positive logic.

[[File:7400-DIL-Chip-Diagram.svg|thumb|An diagram of the 7400 DIL chip with pin numbers and labels.|none]]
{{Clear}}

== Pin functions ==
{| class="wikitable"
! colspan="5" |Pin
! rowspan="3" |I/O
! rowspan="3" |Description
|-
! rowspan="2" |Name
! colspan="4" |Package
|-
!CDIP, PDIP, SOIC, SO, SSOP, CFP
!SO (SN74xx00)
!CFP (SN5400)
!LCCC
|-
|1A
|1
|1
|1
|2
|I
|Gate 1 input
|-
|1B
|2
|2
|2
|3
|I
|Gate 1 input
|-
|1Y
|3
|3
|3
|4
|O
|Gate 1 output
|-
|2A
|4
|6
|6
|6
|I
|Gate 2 input
|-
|2B
|5
|7
|7
|8
|I
|Gate 2 input
|-
|2Y
|6
|5
|5
|9
|O
|Gate 2 output
|-
|3A
|10
|—
|9
|13
|I
|Gate 3 input
|-
|3B
|9
|—
|10
|14
|I
|Gate 3 input
|-
|3Y
|8
|—
|8
|12
|O
|Gate 3 output
|-
|4A
|13
|—
|12
|18
|I
|Gate 4 input
|-
|4B
|12
|—
|13
|19
|I
|Gate 4 input
|-
|4Y
|11
|—
|14
|16
|O
|Gate 4 output
|-
|GND
|7
|4
|11
|10
|—
|Ground
|-
|NC
|—
|—
|—
|1, 5, 7, 11, 15, 17
|—
|No connect
|-
|V<sub>CC</sub>
|14
|8
|4
|20
|—
|Power supply
|}
{{Digital electronics}}
[[Category:7400-Series integrated circuits]]