MAX339ESE

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The MAX339ESE is a low on-resistance, high-voltage, low-voltage, low-capacitance, PD ENHANCED analog switch, which is an ideal choice for the data transmission lines circuit. It is extremely useful in switching, multiplexing and allocating applications, where a low R on and low C on are essential design considerations. Analog signal switching and multiplexing are essential basics of signal processing, signal routing and signal transmission.

Application field

The MAX339ESE is suitable for various signal routing as well as data transmission applications. Furthermore, it can be used as a signal or data router to separate signals originating from multiple sources to send them to separate inputs or channels. It is especially suited for application such as power line multimedia signal transmission, high definition audio/video equipment, audio/video signal multiplexing and networking. The high performance analog switch core enables low power consumption designs, increasing battery life in portable designs.

Working Principle

The MAX339ESE consists of an analog switch core boosted by high performance Digital Enhanced PowerMOS Technology (DEPMOS). This combination allows it to achieve low offsets, low noise, fast switch times and high bandwidth, while maintaining low on-resistance. The device operates with a control voltage range from -7V to +12V and is normally-open, for true 4-way switching with real analog signals. Additionally, it provides an integrated diode protection network that prevents voltage undershoot and allows higher voltages to be applied across the switch terminals.

The operating principle of the MAX339ESE is based on a MOSFET-like device with a PMOS on its drain and an NMOS on its source. When the gate voltage is higher then the electrical MOS drain-source voltage, the NMOS switch is turned on and the current flows. On the other hand, when the electrical MOS drain-source voltage is higher than the gate voltage, the PMOS switch is turned on and the current flows in reverse direction.

The input signal is first applied to the pairs of complementary switches. Alternately, the complementary switches are controlled by the external logic voltage. When the voltage at the logic input is high, the NMOS switch between the drain and source is turned on, allowing the input signal to pass through the drain to the destination output. Conversely, when the logic voltage is low, the PMOS switch between the drain and source is turned on, allowing the input signal to be diverted or multiplexed to a different output.

The MAX339ESE also features a wide variety of protection circuits, such as voltage limitation, ESD protection, thermal overload protection, and polarity protection. These protection circuits make the MAX339ESE suitable for a variety of applications, where it meets safety requirements, protects against accidental shorts, protects against damage from over voltage, and provides excellent protection from outside disturbances.

The MAX339ESE is ideal for use in analog switches, multiplexers, demultiplexers and other switching applications that require low on-resistance and low capacitance. The device offers low on-resistance for both the drain-source and drain-drain paths, minimizing insertion loss and conserving power. In addition, its low capacitance and bandwidth enable accurate routing of fast-switching digital signals at the highest possible frequencies.

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