Part Number: 7403, DM7403, SN7403N
Function : Quad 2-Input NAND Gates
Package: DIP 14 type
Manufacturer: National Semiconductor, Fairchild, TI
Image
Decription
This device contains four independent gates each of which performs the logic NAND function. The open-collector outputs require external pull-up resistors for proper logical operation.
Outputs of one gate can be connected to inputs of another within the same chip or to another chip as long as they share the same ground. The figure to the left illustrates a basic circuit showing how to wire inputs and using LEDs to display outputs.
Pinout
Pin Number Description
1 A Input Gate 1
2 B Input Gate 1
3 Y Output Gate 1
4 A Input Gate 2
5 B Input Gate 2
6 Y Output Gate 2
7 Ground
8 Y Output Gate 3
9 B Input Gate 3
10 A Input Gate 3
11 Y Output Gate 4
12 B Input Gate 4
13 A Input Gate 4
14 Positive Supply
Features
1. Outputs Directly Interface to CMOS, NMOS and TTL
2. Large Operating Voltage Range
3. Wide Operating Conditions
Truth Table
7403 Datasheet
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