MXLSMLJ85A/TR Circuit Protection

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Transient Voltage Suppressor (TVS) diodes are safety devices used to protect sensitive electronic circuits from over-voltage transients and surges generated from lightning, switching inductive loads, and other sources. They are often used in automotive, industrial, and consumer electronics. The MXLSMLJ85A/TR is a low capacitance TVS diode which offers additional protection for high-speed communications interfaces. This article will discuss the application field and working principle of the MXLSMLJ85A/TR.

Applications

The MXLSMLJ85A/TR is designed for use in high-speed data communication interfaces such as USB, SATA, HDMI, and DVI where the data rate is 2.1 Gb/s or higher. The device is especially suitable for mobile applications owing to its small form-factor package and low leakage current. It is also well suited for consumer applications such as computers, laptops, game consoles, and set-top boxes where reliable transient suppression is needed.

Working Principle

TVS diodes are designed to clamp or limit the intensity and force of high voltage transients. When a surge of voltage is detected, the diode conducts forward current to divert it from the protected circuit and thus prevents damage due to over-voltage. The MXLSMLJ85A/TR is a low capacitance (2.4 pF) diode featuring fast response times. It is constructed with two Zener diodes connected in inverse parallel with a common terminal. When a transient voltage is detected, the diode diverts current from the protected circuit and conducts it to ground through the body diode.

The MXLSMLJ85A/TR also features a low maximum voltage clamp of 8.2 V and a surge current rating of 850 A. This ensures that the device can safely withstand and suppress surges up to 2.1 Gb/s. The device has a very fast response time (<10 ns). This ensures that the device can react quickly and protect the device from transients and surges which would otherwise damage the protected circuit.

Conclusion

The MXLSMLJ85A/TR is an ideal choice for high-speed data communication interfaces. Its low capacitance, low voltage clamp, and surge current rating make it a great choice for applications that require reliable and fast protection from voltage transients and surges. The low form factor and low leakage current make it suitable for mobile applications as well.

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