MC10H158M

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Logic - Signal Switches, Multiplexers, Decoders encompass a wide variety of devices and techniques related to multiplexing and decoding. This can range from devices used in switching digital signals to single-chip microcontrollers that perform multiplexing and decoding without the need for additional components. The MC10H158M is an example of such a device; a 3-state inverting multiplexer that is widely used across a variety of applications in the electronics industry, from consumer electronics and industrial automation, to military and aerospace engineering. In this article we discuss the MC10H158M’s application field and its underlying working principle.

What is the MC10H158M?

The MC10H158M is a 3-state Inverting Multiplexer (MUX) with two data inputs and two control inputs. It is a four-terminal device produced by the semiconductor company ON Semiconductor. It is a member of the 10H family of CMOS MUX devices, produced on their CMOS BiCMOS process.

The device is housed in a 16-pin dual in-line plastic package (DIP) and operates over an extended temperature range of -55°C to 125°C. It has two main data inputs, A and B, that each can accept an input logic signal. These signals can be either 0 or 1. The control inputs, X and Y, control direction of the multiplexer by selecting the output from either of the two inputs.

It also has dual output states, both with an active low and an active high state. The device outputs can be configured for either active low or active high output, meaning, the output logic signal is set to the state opposite of the supplied input. This makes it ideal for applications requiring multiplexed and decoded outputs.

MC10H158M Application Field

The applications of the MC10H158M are vast, as it is ideal for use in a variety of digital circuits, wiring harnesses, or automotive systems. It is used to multiplex two digital signals, select one over the other, or even to provide a combination of both.

Examples can include anything from changing input and output configurations, multiplexing devices, converting serial into parallel signals, or certain tasks in digital logic circuits. It is also used as a device in circuit design, such as providing a flexible data selector.

The MC10H158M is also commonly used in the automotive industry, commonly for tasks such as controlling suspension and braking systems, which require a combination of signals from both the left and right side brakes and suspension.

The device has also seen deployments in industrial automation and robotics. As automation has become more common and in-demand, so have devices like the MC10H158M. It plays a crucial role in interfacing between multiple sensors and to provide feedback to a controlling device.

The MC10H158M is also a go-to for military applications. Its ability to provide both an active low and active high output along with its large temperature range make it versatile and resilient in a range of conditions.

MC10H158M Working Principle

So how exactly does the MC10H158M work? In simple terms a Multiplexer can be thought of as a switch that can select one of two inputs and route it to the output. This device is a 3-state multiplexer, which means it can choose either of the two inputs OR setup the output to a high impedance state of float.

The output from the MC10H158M will depend on the state of control inputs X and Y. If X is set to logic high and Y logic low, the output is the inverse of A. If Y is set to logic high and X logic low, the output is the inverse of B. The third state is if Y and X are both logic low, the output is tristated, which means it is not selecting either inputs A or B.

Internally, the MC10H158M uses cross-coupled NMOS-type logic gates comprised of an inverter, dual input NAND and NOR gates. The premise is relatively simple; as the control inputs X and Y toggle, it couples and decouples the logic gates in such a way that the output is set according to the inputs. The active low and active high output functions are generated with the use of a P-Channel MOSFET.

Conclusion

The MC10H158M is an extremely versatile device that has found widespread use from military applications to consumer electronics. Its effective multiplexing and decoding on two signals along with the ability to float its output make it an ideal device for any application requiring sensing or switching of digital signals. The underlying principle of its operation is relatively easy to comprehend and its wide temperature range and robust structure make it perfect for use in different areas.

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