MAX397EWI+T

MAX397EWI+T is an integrated switch/mux chip from Maxim Integrated, a leading supplier of high-performance, linear and mixed-signal integrated circuits. The chip is part of Maxim\'s integrated analog switches, multiplexers, demultiplexers, which provides integrated solutions to managing multiple analog signals. In this article, we will explore the application field and working principle of the MAX397EWI+T chip.

Application Field

The MAX397EWI+T integrates two simultaneous, single-pole/double-throw (SPDT) switches and two 16-channel multiplexers/demultiplexers into one single, small-outline package. The integrated switches provide two independent channels of control. The multiplexers are configured into two-channel mode, with each providing eight channels. The chip is designed to operate on a single +5V supply and is able to handle signals up to 3V peak-to-peak (differential) and ±16V absolute input signals. This makes it suitable for use in a wide range of systems such as automotive, medical, communications, industrial, and embedded applications. Other features including on-chip glitch-free switching, low power consumption of 0.32mA (max.), and low signal leakage currents (0.1nA max.) also make the chip an ideal choice for signal multiplexing.

Working Principle

The MAX397EWI+T has an internal signal path structure, consisting of a pair of SPDT switches, a pair of 16-channel multiplexers/demultiplexers, latch circuitry, and control logic. All of these components are controlled by the logic input signals that are applied by the user through the chip\'s instruction set. When the logic signal is applied, the switches are turned on, enabling the signal to pass through. Similarly, the multiplexers are switched and the latch circuitry holds the logic signal, saving the setting and allowing it to be recalled when required.

The switches and multiplexers can be controlled in two different modes. In the first mode, each of the two SPDT switches and each of the two multiplexers are controlled independently by separate logic input signals. The second mode offers a simultaneous control of both switches and both multiplexers by one logic signal. This allows the chip to be used in more complex applications where multiplexers are used in tandem with switches. For example, the MAX397EWI+T is well suited for applications such as demultiplexing a signal (incoming data) while switching the output to the appropriate channel.

The MAX397EWI+T provides a very versatile and effective solution for managing and switching multiple analog signals. Its integrated structure makes for fast processing and allows for a wide range of applications. Furthermore, the low power consumption and low signal leakage currents of the chip make it an ideal choice for use in embedded applications.