SJM188BXA

Series:	*
Part Status:	Obsolete

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The SJM188BXA is an integrated circuit (IC) intended for analogue signal switching, multiplexing, and demultiplexing. It is a 4-channel switch IC typically used in low-power and low-frequency applications. The SJM188BXA comes with various features such as a wide supply voltage range of ±15 V to ±27 V, high isolation voltage of >=50 V, low distortion, low power consumption of <=150mW, and reduced crosstalk. It also has built-in protection circuits such as input and output overvoltage protection and input and output overcurrent protection. In short, this switch IC helps in the switching of analogue signals from one point to another either through connecting or disconnecting circuits.

Application Field

The SJM188BXA is a very versatile IC as its low distortion, low crosstalk, and low power consumption properties make it suitable for multiplexing, switching, and demultiplexing of analogue signals in a broad range of applications.The most common applications of this IC include operating the switching circuits in amplifiers, audio equipment, sound processors, PA systems, video equipment, industrial automation equipment such as programmable logic controllers (PLCs), light controllers, and sensing systems. It is also used in the home appliances field such as digital televisions, air conditioners, and refrigerators as well as in automobile navigation systems.

Working Principle

The SJM188BXA consists of 4 channels that control the switching of analogue signals. Each one of these channels has an input connection, a control signal connection, and an output connection. The input signals are routed towards the output based on the control signals received by the chip. The control signal is a logic-level input, which can be either HIGH or LOW. When the control signal is LOW, the signals on the input are connected to the output, and when the control signal is HIGH, the input and output connections are disconnected.In a multiplexer configuration, the SJM188BXA can be used to switch analogue signals from up to 4 inputs to a single output. Conversely, the IC can also be used in a demultiplexer configuration, in which the analogue signals are switched from one input to up to 4 different outputs.

Conclusion

The SJM188BXA IC is a very versatile switch IC due to its wide supply voltage range, high isolation voltage, low distortion, low crosstalk, and low power consumption. This makes it suitable for a wide range of applications such as amplifiers and video equipment, as well as in home and automobile appliances. The IC works by routing the input signals to the output based on the control signals received, with each channel consisting of an input connection, a control signal connection, and an output connection. This IC can be operated in both multiplexer and demultiplexer configurations, making it a useful tool for analogue signal switching, multiplexing, and demultiplexing.

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