7432 Quad 2-Input OR Gate IC | Pro Tronix

Product Description

The 7432 Quad 2-Input OR Gate IC is a fundamental high-speed TTL digital logic integrated circuit featuring four independent 2-input OR logic gates in a single compact chip. Operating on the principle of Boolean OR logic, the output of each gate goes HIGH whenever at least one of its input lines receives a HIGH signal, and goes LOW only when both inputs are grounded or LOW.

Engineered for fast logic propagation speeds and reliable performance on a standard 5V DC supply, the 7432 connects directly to standard 5V TTL and CMOS logic families. OR gates are essential building blocks across digital systems, widely used for combining control signals, enabling hardware interlocks, flag decoding, and routing digital data lines. Housed in a standard 14-pin DIP package, it interfaces effortlessly with microcontrollers like Arduino, STM32, and ESP32, or discrete digital circuits. It is an indispensable component for any electronics laboratory, prototyping setup, or digital logic training kit.

⚠️ Standard Pinout Layout: Unlike the 7402 NOR gate, the 7432 OR gate features the standard quad gate pin layout (inputs on Pins 1 & 2 leading to output on Pin 3). Always ensure unused input pins (Pins 1, 2, 4, 5, 9, 10, 12, or 13) are tied to GND or VCC (+5V) to prevent floating gate inputs and unwanted power consumption.

Technical & Logic Architecture

This quad 2-input OR gate IC provides essential signal combining capabilities:

• Four Independent Gates: Four fully isolated 2-input OR logic circuits (Gates 1 through 4) in one package.

• Fast Propagation Delay: Typical switching times under 15 nanoseconds for high-speed logic evaluation.

• Standard TTL Voltage Compatibility: Operates on a standard 5V DC supply with standard TTL input/output switching thresholds.

• Breadboard-Friendly Package: Standard 14-pin Dual In-Line Package (DIP-14) for easy insertion into breadboards and IC sockets.

7432 Truth Table (Function Table)

Key Terms for Truth Table:

• H: High Voltage Level (Logic 1 / VCC)

• L: Low Voltage Level (Logic 0 / GND)

7432 Pinout Description & Logic Functions

• Pin 1 – Input 1A: First input line for OR Gate 1.

• Pin 2 – Input 1B: Second input line for OR Gate 1.

• Pin 3 – Output 1Y: Digital output line for OR Gate 1.

• Pin 4 – Input 2A: First input line for OR Gate 2.

• Pin 5 – Input 2B: Second input line for OR Gate 2.

• Pin 6 – Output 2Y: Digital output line for OR Gate 2.

• Pin 7 – GND: Ground reference pin (0V).

• Pin 8 – Output 3Y: Digital output line for OR Gate 3.

• Pin 9 – Input 3A: First input line for OR Gate 3.

• Pin 10 – Input 3B: Second input line for OR Gate 3.

• Pin 11 – Output 4Y: Digital output line for OR Gate 4.

• Pin 12 – Input 4A: First input line for OR Gate 4.

• Pin 13 – Input 4B: Second input line for OR Gate 4.

• Pin 14 – VCC: Positive power supply input pin (+5V DC nominal).

Operating Modes Summary

1. Standard 2-Input OR Logic: Produces a HIGH output whenever either or both inputs are HIGH.

2. Signal Pass-Through / Enable: Hold one input LOW to allow a signal on the second input to pass through unchanged.

3. Signal Override / Force HIGH: Hold one input HIGH to force the output HIGH regardless of the second input state.

Applications

• Control Line Combining: Combining multiple trigger or interrupt sources into a single microcontroller pin.

• Alarm & Safety Systems: Triggering a central alarm if any individual sensor line goes HIGH.

• Address & Logic Decoding: Evaluating multi-source enable conditions in digital processing circuits.

Technical Specifications

What’s in the Box

• 1 x 7432 Quad 2-Input OR Gate IC (DIP-14).

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🛠️ Complete Your Breadboard Setup

To quickly wire and test the 7432 Quad 2-Input OR Gate IC without soldering, make sure to check out our collection of breadboards, prototype boards, and jumper wires:

• Breadboards & Prototype PCBs: Explore our full range of solderless breadboards and prototyping boards for easy circuit assembly: Pro Tronix Breadboards & PCBs

• Jumper Wires & Connecting Cables: Grab high-quality male-to-male and male-to-female jumper wires to connect your IC pins to power and signal lines: Pro Tronix Wires & Cables Collection