4072 Dual 4-Input OR Gate IC | Pro Tronix

Product Description

The 4072 CMOS Dual 4-Input OR Gate IC is a high-performance CMOS digital logic integrated circuit featuring two independent 4-input OR logic gates in a single package. Operating on the principle of Boolean OR logic, the output of each gate goes HIGH whenever one or more of its four input lines receive a HIGH logic signal, remaining LOW only when all four inputs are grounded or LOW.

Designed with wide supply voltage flexibility (3V to 18V DC) and extremely low static power consumption, the 4072 is ideal for battery-powered circuits and noise-tolerant industrial controls. Featuring fully buffered inputs and outputs, it delivers high noise immunity and strong signal fan-out capabilities. Housed in a standard 14-pin DIP package, it connects easily with microcontrollers like Arduino, STM32, and ESP32 or operates standalone in discrete CMOS and TTL logic systems. It is an essential component for complex signal decoding, multi-sensor alarm triggers, priority encoding, and digital logic training kits.

⚠️ Unused Inputs & Static Handling Tip: CMOS inputs have extremely high impedance. Never leave unused gate inputs floating; connect all unused inputs to either VDD (Logic HIGH) or VSS/GND (Logic LOW) to prevent severe power dissipation and floating logic states. Always observe standard anti-static precautions when handling DIP IC packages.

Technical & Logic Architecture

This dual 4-input OR gate provides flexible logic expansion:

• Dual Independent Gates: Two fully isolated 4-input OR logic circuits (Gate A and Gate B) in one chip.

• Wide Supply Voltage Range: Flexible operating supply voltage from 3V to 18V DC, enabling direct logic interfacing across 3.3V, 5V, 12V, and 15V systems.

• High Noise Immunity: Standard CMOS noise immunity rated at approximately 45% of VDD.

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

4072 Truth Table (Function Table)

Key Terms for Truth Table:

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

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

4072 Pinout Description & Logic Functions

• Pin 1 – Y A (Output Gate A): Digital output line for 4-input OR Gate A.

• Pin 2 – A A (Input 1 Gate A): First input line for Gate A.

• Pin 3 – B A (Input 2 Gate A): Second input line for Gate A.

• Pin 4 – C A (Input 3 Gate A): Third input line for Gate A.

• Pin 5 – D A (Input 4 Gate A): Fourth input line for Gate A.

• Pin 6 – NC: No Internal Connection.

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

• Pin 8 – NC: No Internal Connection.

• Pin 9 – D B (Input 4 Gate B): Fourth input line for Gate B.

• Pin 10 – C B (Input 3 Gate B): Third input line for Gate B.

• Pin 11 – B B (Input 2 Gate B): Second input line for Gate B.

• Pin 12 – A B (Input 1 Gate B): First input line for Gate B.

• Pin 13 – Y B (Output Gate B): Digital output line for 4-input OR Gate B.

• Pin 14 – VDD: Positive power supply input pin (+3V to +18V DC).

Operating Modes Summary

1. Standard 4-Input OR Logic: Any HIGH signal applied to any of the 4 inputs on a gate instantly drives the corresponding output HIGH.

2. Input Expansion / Cascading: Multiple gates can be chained together to create 7-input, 10-input, or wider OR logic functions.

3. Power Down / Standby: Consumes virtually zero quiescent power (nA level) when static, ideal for battery-operated devices.

Applications

• Multi-Sensor Alarm Triggers: Combining 4 independent security sensor triggers into a single interrupt line.

• Digital Signal Decoding: Evaluating multi-bit address lines and status flags in computing hardware.

• Industrial Noise-Tolerant Logic: Building robust 12V and 15V control systems without requiring external microcontrollers.

Technical Specifications

What’s in the Box

• 1 x 4072 CMOS Dual 4-Input OR Gate IC (DIP-14).

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🛠️ Complete Your Breadboard Setup

To quickly wire and test the 4072 Dual 4-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