FSA321UMX

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The FSA321UMX is an analog switch that belongs to Special Purpose interfaces. It is a 4-channel multiplexer/demultiplexer switch with an on resistance of 6.5Ω and an off resistance of 80KΩ. This switch supports I2C, SPI, and TTL communication interfaces, and is suitable for applications in the industrial, gaming, automotive, communication, and medical industries. It has a maximum operating voltage of 5.5V and a wide operating temperature range of -40 to +105 °C.

The switching time of the FSA321UMX varies with the applied voltage, with a rise time of 33ns at 5V, 13ns at 3.3V, and 4ns at 1.8V. This guarantees low data distortion across all applications. The device is built with a push-pull type structure and works in a single-pole single-throw (SPST) configuration, making it ideal for digital signal switching. The FSA321UMX also features integrated overvoltage protection and enhanced ESD performance.

The FSA321UMX features a single-ended output and an active high enable. To operate the device, two supply voltages are required. The HV supply voltage controls the logic operations of the device, while the SV supply voltage is used to control the on/off states of the switch. When the logic voltage is applied to the enable pin, the unit changes to its turns-on state and transmits the signal; when the logic voltage is removed, the unit changes to its turns-off state and the signal is blocked.

Given its multiple features, the FSA321UMX provides an opportunity for superior speed in an economical way. This has boosted the switching capabilities of digital systems, resulting in better performance when transmitting digital signals. In summary, the FSA321UMX is the best choice in applications that require low resistance and fast switching times, such as digital signal switching, industrial control signals,and game console communications.

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