Summary

This ON Semiconductor white paper explains how to protect HDMI interfaces against ESD, surge and EMI while preserving high-speed signal integrity. Readers will learn practical protection topologies, component selection guidance (TVS, common-mode chokes, series components) and PCB layout recommendations tailored to TMDS, DDC and CEC lines.

Key Takeaways

• Identify the unique protection needs of HDMI sub-systems (TMDS high-speed pairs, DDC/CEC control lines, 5V HPD/VBUS)
• Select appropriate protection components (low-capacitance TVS diodes, common-mode chokes, series resistors) based on signal speed and clamping characteristics
• Apply PCB layout and routing practices that minimize added capacitance and maintain differential impedance for TMDS pairs
• Design power and hot-plug protection (HPD/5V sequencing) to avoid latch-up and meet HDMI spec requirements
• Validate protection with relevant EMC/ESD tests (e.g., IEC 61000-4-2, surge standards) and verify eye diagrams to ensure signal integrity

Who Should Read This

Hardware and firmware engineers or system integrators designing or validating HDMI interfaces who need practical guidance on EMC/ESD protection and maintaining high-speed signal integrity.

Still RelevantIntermediate

Topics