Low-Capacitance Automotive Transient Voltage Suppressor from STMicroelectronics Delivers Protection for High-Speed Interfaces

STMicroelectronics’ ESDCAN03-2BM3Y dual automotive-qualified low-capacitance transient voltage suppressor (TVS) protects CAN and CAN-FD interfaces by delivering market-leading all-around performance in a tiny package.

At 1.1mm x 1.0mm, the new TVS meets the automotive industry’s need for highly miniaturized and high-performing protection devices for the increasing numbers of high-density ECUs (electronic Control Units) such as ADAS (Advanced Driver Assistance Systems), autonomous driving controllers, and automotive gateways. Using this device, designers can save 75% or more of the PCB space needed by conventional TVS in SOT23-3L and SOT323-3L packages.

The ESDCAN03-2BM3Y ensures outstanding transient protection with clamping voltage as low as 33V (8/20µs at 1A) and 37V (transmission-line pulse (TLP) at 16A). Passing ISO 16750-2 jump-start and reversed-battery tests, the device is also extremely robust, withstanding 15kV ESD contact discharge (ISO 10605) and, with a 3.3A peak pulse rating, able to handle strong current surges. On top of CAN and CAN-FD, the line capacitance of just 3.3pF allows the TVS to protect high-speed and high-data-rate buses such as FlexRay™ and USB. In addition, such minimal capacitance eases PCB design by allowing extra margin when laying out signal paths.

The maximum junction temperature rating of 175°C allows deployment in locations throughout the vehicle, from the cabin to the engine compartment with severe mission profiles. With an extremely low leakage current of 50nA at 24V, the ESDCAN03-2BM3Y minimizes battery drain when the vehicle is turned off, helping to preserve the state of charge and maximize the driving range in electric-vehicle (EV) applications.

The ESDCAN03-2BM3Y TVS is in production now in the leadless DFN1110 package, which has wettable flanks that facilitate high-speed automatic optical inspection after soldering to fulfil high-quality assurance targets. Prices start at $0.044 for orders of 1000 pieces.

For more information, visit www.st.com