Onsemi MC14081BDR2G Quad 2-Input AND Gate: Datasheet, Pinout, and Application Circuit Guide
The MC14081BDR2G from Onsemi is a cornerstone integrated circuit in the world of digital logic design. As a member of the venerable 4000 series CMOS family, this IC houses four independent 2-input AND gates in a single 14-pin package. Its robustness, wide operating voltage range, and low power consumption make it a versatile choice for a vast array of digital applications, from simple glue logic to complex control systems.
This guide provides a detailed overview of the MC14081BDR2G, covering its key specifications, pinout configuration, and a practical application circuit to help you integrate it into your next project.
Datasheet Overview and Key Specifications
The datasheet for the MC14081BDR2G outlines its electrical characteristics and absolute maximum ratings. Key specifications include:
Logic Family: CMOS
Number of Gates: 4
Inputs per Gate: 2
Supply Voltage Range (VDD): 3.0 V to 18 V. This wide range allows for compatibility with TTL levels (5V) and higher voltage systems.
Low Power Consumption: Typically 10 nW per gate at 5V, making it ideal for battery-powered devices.
High Noise Immunity: A characteristic strength of the 4000 series CMOS family.
Operating Temperature Range: -55°C to +125°C, suitable for industrial and automotive environments.
Package: SOIC-14, a surface-mount package ideal for compact PCB designs.
The "DR2G" suffix indicates it is supplied in a tape and reel format for high-volume, automated assembly.
Pinout Configuration
Understanding the pinout is crucial for correct circuit design. The MC14081BDR2G in a 14-pin SOIC package has the following pin configuration:
Pin 1: Input A for Gate 1
Pin 2: Input B for Gate 1
Pin 3: Output Y for Gate 1
Pin 4: Output Y for Gate 2
Pin 5: Input A for Gate 2
Pin 6: Input B for Gate 2
Pin 7: Ground (VSS)
Pin 8: Input A for Gate 3
Pin 9: Input B for Gate 3
Pin 10: Output Y for Gate 3
Pin 11: Output Y for Gate 4
Pin 12: Input A for Gate 4
Pin 13: Input B for Gate 4
Pin 14: Positive Supply (VDD)
Pins 7 (VSS) and 14 (VDD) must be connected to the power supply for the IC to function. Unused inputs should never be left floating; they must be tied to either VDD or VSS to prevent erratic behavior due to their high impedance.
Application Circuit Guide: Simple Enable/Control Gate
A fundamental application of an AND gate is to act as a control or enable gate. One input serves as a data line, while the other acts as an enable signal. The output will only follow the data input when the enable signal is HIGH (logic 1).
Circuit Example:
To create a simple gated clock or data signal:
1. Connect the data signal (e.g., a clock pulse from a microcontroller) to Input A (e.g., Pin 1) of one AND gate.
2. Connect the enable/control signal (e.g., a switch or another digital output) to Input B (e.g., Pin 2).
3. The output (Pin 3) will only be HIGH when both the data signal and the enable signal are HIGH.
4. Power the circuit by connecting VDD (Pin 14) to a positive supply voltage (e.g., +5V) and VSS (Pin 7) to ground (0V).
5. Place a 0.1 µF decoupling capacitor between VDD and GND, close to the IC, to filter power supply noise.
This simple circuit can be used to enable data transmission, turn on a specific function only when required, or create a basic addressing system by using multiple AND gates with different enable lines.
ICGOODFIND: The Onsemi MC14081BDR2G remains a highly reliable and fundamental component for digital logic operations. Its wide voltage range, excellent noise immunity, and low power consumption solidify its position as a go-to solution for both modern and legacy designs where simple, robust logic gating is required.
Keywords: CMOS Logic IC, AND Gate, Wide Voltage Range, SOIC-14, Enable Circuit
