CPDQC3V3T-HF

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Transient voltage suppressors (TVSs) are utilized in conjunction with the integrated circuits (ICs) to protect the delicate semiconductor circuitry from voltage transients such as electrostatic discharges, powering surges, and voltage spikes. Published by Littelfuse, the CPDQC3V3T-HF is a bidirectional unidirectional TVS Diode Array particularly designed for protecting non-critical data lines from overvoltage transients and providing level shifting applications. This article provides an in-depth discussion about its application fields and working principles.

Application fields of CPDQC3V3T-HF

The CPDQC3V3T-HF bidirectional clamp TVS Diode Array offers a wide and reliable protection against voltage transients and overvoltage peaks in high-frequency signals. Due to its low capacitance, CPDQC3V3T-HF is usually used on data lines with signal rates of 125 Mbps and beyond, which makes it an ideal choice for various signal transmission applications such as 10BASE‑T and 100BASE‑TX Ethernet. With the maximum peak pulse power rating of 600W, it is more than capable of protecting all ESD events, Human Body Model (HBM), IEC61000-4-2, IEC61000-4-4, IEC61000-4-5, and IEC61000-4-11.

CPDQC3V3T-HF is particularly suitable for non-critical differential data line along with ESD and overvoltage protection. Moreover, it can also be used for level shifting by utilizing its superior ESD protection capabilities. The device covers an excellent range of voltage ratings spanning between -50V and 24V, making it perfect for many low voltage and high voltage operations. Furthermore, the low profile package of CPDQC3V3T-HF makes it perfect for applications with tight space constrictions.

Working Principle of CPDQC3V3T-HF

CPDQC3V3T-HF is unidirectional TVS Diode Array, composed of 2 suppressed diode and 4 bilateral diodes for protection against positive or negative voltage transients. When the high-frequency signal on the data line rises above or goes below the normal working level, the corresponding diode(s) will begin to conduct current, clamping the signal and diverting it to the ground.

When there is a high-frequency signal on the data line, the four bilateral diodes effectively prevent this signal from being passed through the device. Thus, the CPDQC3V3T-HF acts as a bidirectional clamp on the data line, preventing any overvoltahe transients from damaging the sensitive electronics.

When the voltage level on the line increases, the two suppressor diodes become active and shift the voltage on the data line back to the working level. Then the device becomes passive, allowing the data signal to pass without any interference. This technique is known as the reverse-biased clamping, which is a popular method used to protect the sensitive semiconductor components from high frequency transients.

To ensure the optimal performance of CPDQC3V3T-HF, it is recommended to use Littelfuse Model CPDQC3V3T-HF Solder Assembly. It is an all-in-one device that provides protection for your delicate semiconductor circuitry against voltage transients and overvoltage peaks in high-frequency signals.

Conclusion

CPDQC3V3T-HF is a bidirectional unidirectional TVS Diode Array from Littelfuse. It is mainly used to protect non-critical data lines from transients and overvoltage peaks. It offers an excellent range of voltage ratings, making it an ideal choice for many low voltage and high voltage operations. With its reverse-biased clamping technique, it has the potential to provide superior protection for sensitive semiconductor components against voltage transients and overvoltage peaks. Moreover, it is compliant with ESD, HBM, IEC61000-4-2, IEC61000-4-4, IEC61000-4-5, and IEC61000-4-11 standards, making it an excellent choice for TVS diodes.

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