onsemi MC14011BDTR2G Quad 2-Input NAND Gate: Datasheet, Pinout, and Application Circuit Guide
The MC14011BDTR2G from onsemi is a fundamental integrated circuit belonging to the 4000-series CMOS logic family. This device contains four independent, low-power 2-input NAND gates in a single package, making it an exceptionally versatile component for a vast array of digital logic applications. Its robustness, wide supply voltage range, and simplicity have cemented its status as a staple in both prototyping and production environments.
This guide provides a detailed overview of its datasheet specifications, pinout configuration, and a practical application circuit to demonstrate its utility.
Datasheet Overview and Key Specifications
The MC14011BDTR2G is designed to operate over a broad voltage range, typically from 3V to 18V, which provides significant flexibility in interfacing with various power supply levels. Key absolute maximum ratings and electrical characteristics from the datasheet include:
Supply Voltage Range (VDD): -0.5V to +18V
Input Voltage Range (Vin): -0.5V to VDD + 0.5V
Operating Temperature Range: -55°C to +125°C
Low Power Consumption: Typically in the nano-watt range under static conditions, making it ideal for battery-powered devices.
High Noise Immunity: A characteristic feature of CMOS technology, providing reliable operation in electrically noisy environments.
The "DTR2G" suffix denotes the surface-mount TSSOP-14 package, which is suitable for automated PCB assembly. The device is also available in other packages like PDIP-14 for through-hole prototyping.
Pinout Configuration
Understanding the pinout is crucial for correct circuit design. The MC14011BDTR2G in a 14-pin package has the following pin configuration:
Pins 1, 2, 5, 6, 8, 9, 12, 13: These are the input pins for the four NAND gates. Each gate uses two of these pins.
Pins 3, 4, 10, 11: These are the output pins for the four NAND gates. The output of a gate is only LOW (logic 0) when both of its inputs are HIGH (logic 1).
Pin 7 (VSS): This is the ground pin (0V reference).
Pin 14 (VDD): This is the positive power supply pin.
A simple truth table for a single NAND gate within the IC is:
| Input A | Input B | Output Y |
| :-----: | :-----: | :------: |
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
Application Circuit Guide: Simple Oscillator (Astable Multivibrator)
One of the most common applications of the MC14011BDTR2G is creating a clock pulse or oscillator circuit. This circuit uses three of the four available NAND gates.
Circuit Components:
IC1: MC14011BDTR2G
R1: 1MΩ Resistor
R2: 1MΩ Resistor
C1: 100nF Capacitor
Power Supply (e.g., 5V to 12V)
Circuit Operation:
1. Configuration: Gates U1A and U1B are wired as inverters by connecting their two inputs together. These are used to provide the inverting function and gain necessary for oscillation.
2. Timing Network: The feedback and timing of the oscillation are controlled by the RC network (R1, R2, and C1). The capacitor C1 charges and discharges through the resistors, creating a slowly changing voltage at the input of gate U1A.
3. Oscillation: When the voltage across capacitor C1 reaches the switching threshold of the CMOS gate, it causes the output of U1A to change state. This change is fed through the second inverter (U1B) and back to the capacitor via the resistors, forcing it to charge in the opposite direction. This process repeats indefinitely.
4. Output: The output is taken from the output pin of U1B (pin 4). This generates a continuous square wave. The frequency of this wave is determined by the values of R1, R2, and C1. The formula for approximate frequency is f ≈ 1 / (2.2 R C), where R is the combined resistance.
This simple oscillator is perfect for generating clock signals for other digital circuits, blinking LEDs, or creating tone generators for buzzers.
ICGOODFIND: The onsemi MC14011BDTR2G exemplifies the enduring value of basic logic gates. Its wide voltage operation, low power consumption, and ability to function beyond pure logic (e.g., in oscillator circuits) make it an indispensable tool for electronics engineers and hobbyists. Whether you are building a basic educational project or a complex digital system requiring a simple glue logic solution, this quad NAND gate offers reliable and cost-effective performance.
Keywords: MC14011BDTR2G, CMOS Logic, NAND Gate, Datasheet, Oscillator Circuit
