74132 IC Quad 2-Input NAND Schmitt-Trigger
The 74132 is a Quad 2-Input NAND Schmitt-Trigger integrated circuit, designed to provide noise immunity and hysteresis for digital signal processing. This IC contains four independent 2-input NAND gates with Schmitt-trigger inputs, making it ideal for use in applications where noise and signal fluctuations need to be minimized, ensuring stable and reliable logic transitions.
74132 Pinout
Pin Description:
Pin #
Type
Description
1
Input
Input to the first NAND gate.
2
Input
Input to the first NAND gate.
3
Output
Output from the first NAND gate.
4
Input
Input to the second NAND gate.
5
Input
Input to the second NAND gate.
6
Output
Output from the second NAND gate.
7
Power
Connect to ground (GND).
8
Output
Output from the third NAND gate.
9
Input
Input to the third NAND gate.
10
Input
Input to the third NAND gate.
11
Output
Output from the fourth NAND gate.
12
Input
Input to the fourth NAND gate.
13
Input
Input to the fourth NAND gate.
14
Power
Positive power supply (VCC). Connect to +5V power.
What does the 74HC132 / 74LS132 do?
The 74132 gives you four NAND gates with Schmitt triggers. ANAND gateis alogic gatethat outputs 0 (LOW) only if all of its inputs are 1 (HIGH). In the truth table below, you can see what the output will be for any given input:
Truth table for the NAND gate
What is a Schmitt Trigger?
So, heres the thing. The gate inputs being Schmitt-triggered basically means that the threshold for a 0 becoming a 1 is not the same as for a 1 becoming a 0.
Think of it like this. Say, youre running this chip on three AA batteries, which gives you 4.5V. For the input to be read as a 1, or HIGH, the voltage has to climb over 2V. But, when youre already at HIGH, the voltage needs to dip under 0.9V for the input to be recognized as a 0, or LOW. You can get these numbers from thedatasheet, by the way.
How To Use This Chip
The 74HC132 comes in a 14-pin package, and you need to connect it to power before you can use it. Most 7400 ICs support a VCC voltage of 5V. One difference between the HC and LS version of the chip is that the 74HC132 supports 2V to 6V, while the 74LS132 only supports 5V.
Technical Specifications
Physical
Case/Package
DIP
Mount
Through Hole
Number of Pins
14
Technical
High Level Output Current
-5.2 mA
Logic Function
NAND
Low Level Output Current
5.2 mA
Max Operating Temperature
125 C
Max Supply Voltage
6 V
Min Operating Temperature
-40 C
Min Supply Voltage
2 V
Number of Circuits
4
Number of Elements
4
Number of Gates
4
Number of Inputs
2
Number of Outputs
1
Operating Supply Voltage
5 V
Output Current
5.2 mA
Propagation Delay
32 ns
Quiescent Current
2 A
74132 Datasheet
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