onsemi SESDONCAN1LT3G: Bidirectional CAN Bus ESD Protection Diode

In the demanding environment of automotive and industrial networks, the Controller Area Network (CAN bus) serves as the critical backbone for data communication between electronic control units. However, these systems are perpetually vulnerable to destructive electrostatic discharge (ESD) and other transient voltage events, which can cause immediate failure or latent damage leading to system malfunctions. To safeguard these essential communication lines, robust protection components are not just an addition but a necessity. The onsemi SESDONCAN1LT3G is a state-of-the-art solution designed specifically for this purpose.

This device is a single-channel, bidirectional TVS diode array engineered to protect one CAN bus line. Its primary function is to clamp hazardous voltage transients to a safe level before they can reach the sensitive transceiver IC. What sets the SESDONCAN1LT3G apart is its remarkably low clamping voltage and ultra-low dynamic resistance. This ensures that during an ESD strike, the voltage seen by the protected IC is minimized, dramatically increasing its survivability. It is rigorously tested to withstand the most severe ESD events, offering best-in-class protection exceeding ±30 kV (IEC 61000-4-2, contact discharge).

A key advantage of this diode is its bidirectional functionality, which provides protection against voltage surges of both polarities without requiring specific orientation relative to the signal. Furthermore, it features an extremely low leakage current and low capacitance, typically less than 50 pF. This is crucial for high-speed data lines like CAN FD (Flexible Data-Rate), as it prevents signal distortion and ensures integrity of data transmission without compromising the network's performance.

Housed in a compact SOT-23-3 package, the SESDONCAN1LT3G offers a highly effective and space-efficient protection scheme, making it an ideal choice for space-constrained automotive modules, industrial automation systems, and any application requiring reliable CAN interface protection.

ICGOODFIND: The onsemi SESDONCAN1LT3G is an indispensable guardian for CAN bus interfaces, providing superior bidirectional ESD protection with minimal impact on signal integrity. Its high robustness, low capacitance, and compact form factor make it a premier choice for designers aiming to enhance system reliability and meet stringent automotive immunity standards.

Keywords: ESD Protection, CAN Bus, Bidirectional Diode, Transient Voltage Suppression, Automotive Electronics