Automotive-qualified Transient Voltage Suppression for data buses

November 24, 2015 // By Graham Prophet
Semtech has added to its protection devices with an AEC-Q100 qualified device designed to safeguard the high-speed data lines found in today's vehicles. The RClamp0524PQ TVS protects automotive data ports from ESD and overvoltage transients

Rclamp0524PQ is a 4-line integrated Transient Voltage Suppression (TVS) array targeted at protecting automotive data lines against electrical transient threats. By offering a 20% reduction in clamping voltage and an enhanced ESD immunity level (±25 kV air discharge and a ±15 kV contact discharge) along with an ultra-low capacitance rating, the device addresses the protection needs of the high-speed data lines found in today's cars, including LVDS and HDMI.

The requirement that protection components minimally affect the signal integrity of high-speed signal lines is critical to ensuring data integrity. The design of the RClamp0524PQ allows the device to achieve excellent results on established compliance tests that measure signal integrity in HDMI and LVDS lines. The stable and very low capacitance enables the device to reside on high-speed data lines without compromising key signal performance metrics. The flow-through structure of the package facilitates optimal trace routings for system designs and provides an additional safety margin for meeting signal integrity requirements.

Features of the Rclamp0524PQ include;

- Transient protection for high-speed data lines to: IEC 61000-4-2 (ESD) ±25 kV (air), ±15 kV (contact); IEC 61000-4-4 (EFT) 40A (5/50 nsec); IEC 61000-4-5 (Lightning) 4A (8/20 µsec)

- 5V working voltage protection

- Protects 4 I/O lines

- Low capacitance (<0.4 pF line-to-line)

- 2.5 x 1.0 mm package

The RClamp0524PQ is priced at $0.33 (10,000).