Components

AEC-Q100-1 24V Protection Array for CAN Bus Nodes with ±30kV ESD

Semtech Corporation introduced a new AEC-Q100-1 qualified protection array for automotive CAN bus nodes. The company optimized the new low capacitance 24V (Vrwm) transient voltage protection µClamp® array to safeguard automotive CAN bus nodes from threats of electrostatic discharge (ESD) and over-voltage transients. Applications for the protection array include automotive, CAN Bus, FlexRay Bus, and industrial.

“CAN continues to be an important and prolific bus used in today’s automotive system designs,” said Tamir Reshef, Product Marketing Director for Semtech’s Protection Products Group. “The new µClamp2492SQ, with its superior ESD robustness and low clamping voltage performance, provides automotive engineers a much-needed solution to safeguard CAN nodes.”

The CAN networking bus has long served as the basis of vehicle networking and is widely used in today’s vehicles. To adequately provide ESD immunity, CAN nodes require ESD protection with 24V working voltage and a low ESD clamping voltage to safeguard bus nodes from the harsh electrical environment in the car. The two-line, 24V µClamp2492SQ provides a low ESD clamping voltage while minimizing loading capacitance, making it suitable for higher speed versions of CAN, such as CAN 2.0 and CAN FD.

The µClamp2492SQ comes in an industry standard SOT-23 3L package and provides two lines of robust transient protection. According to Semtech, the device far exceeds the IEC61000-4-2 ESD immunity standards, providing a protection level of ±30kV air and ±30kV contact.

Automotive CAN Bus Schematic (Click to enlarge image)

μClamp2492SQ integrates two bidirectional TVS diodes rated at 24V. ESD characteristics are highlighted by high ESD withstand voltage (±30kV contact/air discharge per IEC 61000-4-2) and low dynamic resistance. Each device is rated for a maximum EOS current of 5A (tp = 8/20µs). This device is qualified to AEC-Q100, Grade 1 (-40°C to +125°C) for automotive applications.

Key Features of µClamp2492SQ
  • Transient protection for high-speed data lines to: IEC 61000-4-2 (ESD) ±30kV (air), ±30kV (contact); IEC 61000-4-4
  • (EFT) 4kV (5/50ns); IEC 61000-4-5 (Lightning) 5A (8/20μs)
  • 24V working voltage protection
  • Protects two I/O lines
  • Low capacitance (<18pF line-to-line)
  • Industry standard SOT-23 package
  • AEC-Q100 qualified to Grade 1
  • Pb-Free and RoHS/WEEE compliant

The µClamp2492SQ (order code: µClamp2492SQTCT) is available immediately in production quantities. Semtech offers comprehensive design assistance, including field- and factory-based support.

Semtech Corp.
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