The 7412 is a triple 3-input NAND gate IC used to combine digital logic signals in control circuits, logic systems, and electronic projects requiring open-collector outputs.
The 7412 Triple 3-Input NAND Gate is a digital logic integrated circuit containing three independent NAND gates, each with three input terminals. Each gate produces a LOW output when all three inputs are HIGH. Otherwise, its output remains in the non-conducting state, allowing the output to be pulled HIGH using an appropriate external pull-up resistor.
The IC features open-collector outputs, making it useful for wired logic connections and interfacing with compatible digital circuits. Its DIP-14 through-hole package is suitable for PCB assembly, breadboard prototyping, and educational electronics applications. Because the outputs are open-collector, a suitable external pull-up resistor is required when a defined HIGH logic level is needed.
Features:
Three independent NAND gates.
Three inputs per gate
Open-collector outputs
Supports wired logic configurations
Suitable for digital signal control
Through-hole DIP package
TTL logic compatibility
Pinout:
Pin Name
Pin #
Type
Description
VCC
14
Power
Supply Voltage
GND
7
Power
Ground
A1 to A3
1, 2, 13
Input
Inputs A of the three NAND gates
B1 to B3
3, 4, 5
Input
Inputs B of the three NAND gates
C1 to C3
9, 10, 11
Input
Inputs C of the three NAND gates
Q1 to Q3
12, 6, 8
Output
Outputs from the three NAND gates
Input A
Input B
Input C
Output Q
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
0
Truth Table for the 3-input NAND gate
Specifications:
Product Attribute
Attribute Value
Product Category:
Logic Gates
Product:
7412 Single-Function Gates
Logic Function:
NAND
Logic Family:
74LS
Number of Gates:
3 Gate
Number of Input Lines:
3 Input
Number of Output Lines:
1 Output
High Level Output Current:
– 100 uA
Low Level Output Current:
8 mA
Propagation Delay Time:
32 ns
Supply Voltage – Max:
5.25 V
Supply Voltage – Min:
4.75 V
Minimum Operating Temperature:
0 C
Maximum Operating Temperature:
+ 70 C
Mounting Style:
Through Hole
Package/Case:
PDIP-14
Function:
Gate
Logic Type:
3-INPUT NAND
Operating Supply Voltage:
5 V
Operating Temperature Range:
0 C to + 70 C
Applications:
Digital logic circuits
Control and switching systems
Wired logic configurations
Digital signal combination
Interface circuits with external pull-up resistors
