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TVS diodes are special semiconductor devices which are designed to provide protection by clamping transients to a safe voltage level. The SM6T68CA-E3/52 TVS diode is a low capacitance diode specifically designed for today\'s high-speed communication applications. This article will explain the application field and working principle of the SM6T68CA-E3/52 TVS diode.

Application Field of SM6T68CA-E3/52 TVS Diode

The SM6T68CA-E3/52 TVS diode is designed with high-speed performance in mind, and is suitable for transient voltage suppression in a wide range of high-speed interfaces, such as USB 2.0, SATA, eSATA, 1394b, 10/100/1000 Ethernet and Display Port. It is the perfect choice to protect highly sensitive components from electrostatic discharge (ESD) and electrical overstress (EOS).

The SM6T68CA-E3/52 is designed to safely handle 8kV contact and 15kV airESD pulses, as well as EOS currents up to 11A. It features lowcapacitance (C=3pF typical) andfast response time (tr=19ps typical). The ultra-lowcapacitance makes it ideal for data protection in high-speed serial links, and is ideal for board protectors, I/O protection and external ESD protection.

Working Principle of SM6T68CA-E3/52 TVS Diode

The SM6T68CA-E3/52 TVS diode uses a dynamic zener diode structure for its ESD and EOS protection. This makes it especially suitable for high-speed applications as the device has a much lower capacitance than other protection devices.

The operation of the device agrees with a Zener diode\'s typical voltage-dependent mode of operation. It goes into avalanche breakdown when the voltage across the diode exceeds its breakdown voltage, thus providing protection to the device. It is also able to provide protection from dangerous peak pulse currents, since its voltage remains constant regardless of the amount of current passing through it.

The dynamic Zener diode structure also has a much faster response time than other static-overvoltage failure devices. This fast response time allows it to protect against high frequency transients that other devices are unable to protect against.

The SM6T68CA-E3/52 has an integrated bidirectional ESD diode for additional protection. This provides an additional layer of protection from ESD both directly and indirectly. The bidirectional ESD diode provides protection on the positive and negative sides of any connection, reducing the chances of failure due to ESD.

Conclusion

The SM6T68CA-E3/52 TVS diode is an ideal choice for high-speed data protection applications. It features a low capacitance and fast response time, making it suitable for board protectors, I/O protection and external ESD protection. It also has an integrated bidirectional ESD diode for additional protection against ESD and EOS.

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