onsemi MC74VHC14DR2G Hex Inverting Schmitt Trigger: Datasheet, Pinout, and Application Circuits

The onsemi MC74VHC14DR2G is a high-performance, hex inverting Schmitt trigger belonging to the advanced VHC (Very High-Speed CMOS) logic family. This IC integrates six independent inverters with Schmitt-trigger inputs, making it highly effective in signal conditioning, noise elimination, and waveform shaping applications. Its design combines high-speed operation with low power consumption, making it suitable for a wide range of digital systems.

Datasheet Overview

Key parameters outlined in the datasheet include a wide operating voltage range from 2.0V to 5.5V, allowing compatibility with both 3.3V and 5V systems. It features a typical propagation delay of 5.5 ns at 5V and very low static power dissipation. The device also offers high noise immunity due to its Schmitt trigger input architecture, which includes distinct positive-going (VP) and negative-going (VN) threshold voltages. The hysteresis voltage (the difference between VP and VN) ensures reliable switching even with slow or noisy input signals.

Pinout Configuration

The MC74VHC14DR2G is available in a SOIC-14 package. The pinout is as follows:

- Pins 1A to 6A: Inputs for the six inverters.

- Pins 1Y to 6Y: Corresponding outputs.

- Pin 7: Ground (GND).

- Pin 14: Supply Voltage (VCC).

Each inverter operates independently, providing flexibility in circuit design.

Application Circuits

1. Signal Debouncing: The Schmitt trigger action is ideal for cleaning up mechanical switch inputs, eliminating contact bounce, and producing a clean digital output.

2. Waveform Shaping: It can convert slow or distorted input signals (e.g., sine waves or triangular waves) into crisp digital square waves.

3. Oscillator Circuits: By connecting a resistor and capacitor between the output and input of a single inverter, the MC74VHC14 can be used to build a simple RC oscillator. The hysteresis controls the charging and discharging of the capacitor, generating a continuous clock signal.

4. Voltage Level Translation: With its wide operating voltage range, it can interface between devices with different logic levels.

ICGOODFIND: The MC74VHC14DR2G is a versatile and robust solution for noise filtering, signal conditioning, and clock generation. Its high speed, low power, and built-in hysteresis make it indispensable in modern digital design, from consumer electronics to industrial systems.

Keywords:

Schmitt Trigger, Signal Conditioning, Waveform Shaping, VHC Logic, Noise Immunity