TDK introduces ultra-compact TVS diodes that provide complete ESD protection for USB-C

     TDK Corporation has introduced an ultra-compact TVS diode for ESD protection applications with USB-C ports and other high-speed interfaces. For high-speed interfaces (Tx/Rx) such as USBC-C that comply with the USB4 (Version 1) specification and transmit at speeds up to 40 Gbit/s, ESD protection applications particularly require TVS diodes with ultra-low parasitic capacitance and low clamp voltage.

     The new B74111U0033M060 and B74121U0033M060 components have parasitic capacitance of 0.48 pF and 0.65 pF respectively at 1 MHz, clamp voltage of only 3.8V or 3.9V, and ITLP of 8 A, which do not interfere with signal integrity, making them ideal for such applications. These TVS diode protection elements are designed with ESD discharge voltages up to 15 kV and come in ultra-compact WLCSP 01005 and WLCSP 0201 flat structure packages with heights of 100µm and 150µm, respectively, for easy integration into USB-C SIP modules.

     The new B74111U0055M060 and B74121U0055M060 components have a maximum DC voltage of 5.5V and are suitable for conventional USB2.0 data buses of USB-C (D+ / D-). They have clamp voltages of 3.9V and 4.0V respectively (at 8 A ITLP), designed ESD discharge voltages up to 15 kV, and housing design and height to match the applicable interface type.

     Power cable VBUS (CC/SBU) provides A maximum transmission power of 100 W when the voltage is less than 20 V and the current is less than 5 A. Therefore, safe ESD protection is essential. In view of this, TDK has specially introduced two new components, B74121G0160M060 and B74121G0200M060. The components have maximum operating voltages of 16 V and 20 V, clamp voltages of 23 V and 27 V (at 8 A ITLP), capacitance values of 6 pF and 5 pF, and have high linearity and nominal ESD contact discharge voltages of up to 15 kV. In addition, they are available in the compact WLCSP 0201 form design with a height of 150µm.

     Due to different requirements, complete ESD protection for USB-C requires a total of three different types of TVS diodes. In addition to USB-C, the new components are also widely used in ESD protection applications for other high-speed interfaces such as Thunderbolt, HDMI, DisplayPort, FireWire, DVI, S-ATA, or SWP/NFC. And typical end devices such as smartphones, tablets, laptops, wearables or network components.