onsemi MC14053BDR: Triple 2-Channel Analog Multiplexer/Demultiplexer Datasheet and Application Overview

The onsemi MC14053BDR is a member of the 4000 series CMOS logic family, renowned for its robust performance and versatility in managing analog and digital signals. This integrated circuit (IC) is a triple 2-channel analog multiplexer/demultiplexer, meaning it contains three independent single-pole, double-throw (SPDT) switches in a single 16-pin package. Its primary function is to route one of two input signals to a common output, or conversely, to direct a single input to one of two possible outputs, operating effectively as both a multiplexer and a demultiplexer.

A key strength of the MC14053BDR lies in its ability to handle both analog and digital signals. The device features a wide analog signal range, typically from the negative supply voltage (VEE) to the positive supply voltage (VCC). With a recommended supply voltage range of 3V to 18V, it offers significant design flexibility, compatible with both TTL and higher voltage CMOS logic levels. This makes it suitable for a vast array of applications, from battery-operated devices to industrial control systems.

The internal architecture consists of three digitally controlled switches. Each switch is controlled by its own select input (e.g., Control A for Switch A). A common INHIBIT pin is provided; a high logic level on this pin disables all switches simultaneously, setting all outputs to a high-impedance state, which is crucial for power management and bus-oriented systems.

Critical electrical characteristics detailed in the datasheet include low "ON" resistance (typically 270Ω at VDD = 15V), very low quiescent power consumption (in the nanowatt range), and high "OFF" channel isolation. These parameters are vital for preserving signal integrity, especially when switching low-level analog signals.

Typical Applications for the MC14053BDR are diverse:

Analog and Digital Signal Multiplexing/Demultiplexing: Used in data acquisition systems to sequentially connect multiple sensors to a single analog-to-digital converter (ADC).

Signal Gating and Routing: Employed in audio and video equipment to switch between different source signals.

Programmable Gain Amplifiers: The switches can be used to select different feedback resistors in an op-amp circuit, altering the gain dynamically.

Communication Systems: Functioning as a demultiplexer to route data to different channels.

When designing with this IC, careful consideration of unused inputs is necessary; they must be tied to VSS or another logical level. Furthermore, to prevent damage from electrostatic discharge (ESD), standard CMOS handling procedures should be followed. For optimal analog performance, board layout should minimize parasitic capacitance, and supply lines must be adequately decoupled.

ICGOODFIND: The onsemi MC14053BDR is a highly versatile and reliable solution for signal routing tasks. Its wide voltage range, low power consumption, and ability to handle analog and digital signals make it a fundamental component for engineers designing data acquisition, audio-video switching, and communication systems. Its robustness and simplicity ensure its continued relevance in both modern and legacy designs.

Keywords: Analog Multiplexer, CMOS Logic, Signal Routing, Low Power Consumption, Wide Voltage Range