Dual Or (4 input)CD4072

The Dual Or (4 input)CD4072 is a CMOS logic IC from the 4000 series that contains two independent 4-input OR gates. Each output goes high when any one of its four inputs is high, and stays low only when all four inputs are low. It runs on a wide supply range, which makes it easy to combine several alarm, sensor or switch signals into one line.

Dual Or (4 input)CD4072 Specifications

• Function: dual 4-input OR gate (Y = A + B + C + D)
• Logic family: CMOS 4000 series
• Supply voltage: 3 V to 15 V
• Gate 1: inputs on pins 2–5, output on pin 1
• Gate 2: inputs on pins 9–12, output on pin 13
• Power pins: VDD pin 14, VSS (GND) pin 7; pins 6 and 8 not connected
• Pin count: 14

Dual Or (4 input)CD4072 Applications

• Combining several sensor or alarm signals into one output
• Wide OR functions in control and interlock logic
• Wake-up or interrupt signal from several buttons for a microcontroller
• Replacing several 2-input OR gates with one chip
• Digital electronics classes and logic labs

What's in the Box

• 1 × CD4072 dual 4-input OR gate IC

Tip: Tie any unused inputs of a gate to VSS (GND), because a floating CMOS input picks up noise and can make the output switch randomly. Handle the IC with care, as CMOS parts are sensitive to static electricity.

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