HEF4050BT Hex Non-Inverting Buffer: Datasheet, Pinout, and Application Circuit Guide

The HEF4050BT is a widely used hex non-inverting buffer belonging to the 4000 series CMOS logic family. It is designed to provide high noise immunity and low power consumption, making it a versatile component in various digital and industrial applications. This IC contains six independent non-inverting buffer gates, each capable of transforming a high-impedance input signal into a stronger, low-impedance output, effectively amplifying current without altering the logic state.

Datasheet Overview

Key electrical characteristics from the datasheet include a wide supply voltage range from 3V to 15V, allowing compatibility with TTL levels and higher voltage systems. It features a typical high noise immunity of 1.5V at VDD = 5V. Each buffer can sink or source significant current, with a typical output drive capability of several milliamps, enabling it to directly drive LEDs, relays, or other high-current loads. The device operates over a broad temperature range, typically from -40°C to +125°C, suiting it for industrial environments.

Pinout Configuration

The HEF4050BT is packaged in a standard 16-pin DIP or SOIC package. The pinout is arranged as follows:

Pins 1, 3, 5, 9, 11, 13: Inputs for the six buffers (1A to 6A).

Pins 2, 4, 6, 8, 10, 12: Corresponding outputs (1Y to 6Y).

Pin 7: VSS (Ground).

Pin 14: VDD (Positive Supply Voltage).

Pins 15 and 16: Not connected (NC).

Application Circuit Guide

A primary application of the HEF4050BT is level shifting and signal conditioning. For instance, it can interface a 3.3V microcontroller with a 5V peripheral device. The input pin accepts the 3.3V logic signal, and the output reproduces it at the full 5V rail voltage (VDD), provided the IC's supply is 5V.

Another common use is as a driver for LEDs and displays. A simple LED driver circuit involves connecting an input pin to a logic source (e.g., a microcontroller GPIO pin), the output pin to a current-limiting resistor and an LED, with the cathode grounded. The buffer's robust output can easily sink the required current to illuminate the LED brightly.

Furthermore, it is excellent for buffering clock signals or other critical digital lines to prevent loading from affecting the source. This ensures signal integrity across a circuit board or between different modules.

ICGOODFIND Summary

The HEF4050BT is a robust and versatile component, prized for its simple functionality, high noise immunity, and strong output drive capability. It serves as a fundamental building block for tasks like level translation, signal isolation, and driving various loads, making it an indispensable part of a digital designer's toolkit.

Keywords: Hex Non-Inverting Buffer, Level Shifting, CMOS Logic, Signal Conditioning, HEF4050BT Datasheet