LMH1251MT

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LMH1251MT is a high-performance interface for the Analog switch category within the Special Purpose product. It was used to offer multiple low-power and low-glitch design features, making it a viable solution for applications with very restrictive I/O requirements. It is a dual 4:1 differential-channel multiplexer designed in a low-voltage CMOS process and intended for use in PC/server, peripherals and general-purpose I/O applications.

The Analog switch category within the Special Purpose product contains switching devices such as multiplexers and analog switches, providing high-impedance input and output levels. This class of products is usually operated in the high-impedance switch state and is mainly used for the switching of analog signals at high frequencies and/or low voltages. The LMH1251MT application field and working principle is no different compared to typical analog switch products.

The main application of the LMH1251MT is to provide differential or single-ended multiplexing with low on-resistance and very low off-capacitance for improved signal integrity. It can also be used for fan-out, signal switching, and level shifting applications. Its single-ended input configurations offer superior signal frequency response and signal-to-noise ratio performance, making it ideal for most general-purpose I/O applications, such as automotive, medical, security, and communication systems. Additionally, its low-voltage CMOS process enables compatibility with a wide range of system-level supply voltages, making it suitable for direct interfacing to 3.3V–5.5V logic, TTL, and LVDS systems.

The working principle behind the LMH1251MT is that of a differential multiplexer, which acts as a switch between two input signals. When an input is selected, the signal is routed to the output while the other input is disabled. The device is designed to provide superior signal integrity and performance in applications requiring a low on-resistance and very low off-capacitance. The differential multiplexer consists of two 4:1 multiplexers, each consisting of four single-ended or two differential input pins and one differential output pin.

The signal-to-noise ratio performance of the LMH1251MT is superior than most of the competitive switched devices as it offers low signal distortion, low cross-talk, and low linearity errors due to its low on-resistance and extremely low input capacitance of <20pF. The 4:1 multiplexer design provides for flexible signal, power, and clock routing flexibility, which is vital for high-speed communication links and other applications requiring multiple switch configurations with very high signal frequency responses.

In summary, the LMH1251MT is an ideal solution for applications requiring low power consumption and excellent signal integrity. The device offers multiple low power, low glitch designs making it suitable for applications with very tight I/O requirements. Its superior signal frequency response and signal-to-noise ratio performance makes it suitable for high-speed communication links and other applications requiring multiple switch configurations. Additionally, its low-voltage CMOS process makes it compatible with a wide range of system-level supply voltages. All these features make the LMH1251MT an excellent choice for any application requiring signal switching or level shifting capabilities.

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