74HC4051 8Channel Analog Multiplexer Selector Module Key benefits Enables you to route one of eight analog input signals to a single output, simplifying signal paths before an ADC Three simple address lines provide straightforward control from microcontrollers and digital systems Reduces the need for multiple ADCs or routing hardware, delivering an economical and reliable solution Suitable for a range of analog signal sources, including video and sensor data, with dependable performance What it does 8 input channels (IN1 to IN8) multiplexed to one common output (Z), selected by three address lines Designed to work as part of a signal path before analogtodigital conversion Built as a compact module for easy integration into projects and systems Key features 8channel analog multiplexing with a single output Simple control via three address/select inputs Compact module suitable for integration into projects, breadboard setups, or PCB designs Economical component choice for versatile applications Maintains a straightforward, reliable analog signal path Compatibility and performance Intended for routing standard analog signals to a single destination such as an ADC input Works with typical microcontroller, processor, or digital control environments that provide simple select line control Suitable for applications requiring flexible channel selection without adding complexity or cost 23 practical use scenarios Video signal selection: choose from multiple video sources to feed a single capture card or display system in a compact, centralized routing solution Sensor data collection: multiplex several sensors into one ADC input to streamline data logging or monitoring setups Lab and test setups: quickly switch calibration references or auxiliary signals in a research or development bench without swapping cables or boards Usage notes Ensure the input signals stay within the module's supported analog voltage range and that the common output is connected to the ADC input Connect the three address lines to your control logic or microcontroller and drive them to select the desired input channel Use a common ground for all sources and the rest of the system to maintain signal integrity