HDMI ESD Protection

Two essential functions that customers look for in HD video systems are fast data processing and high-speed interface. Advances in data process technology are shrinking trace geometries and allowing for more performance and functionality to be included on ever-smaller integrated circuits (ICs). As for high-speed interface, High-Definition Multimedia Interface (HDMI) is the latest standard for devices that handle high-bandwidth, real time data, such as HDTV.

However, the higher the data speed and the more advanced the process technology are, the harder it is to protect the IC adequately from over-voltage stresses caused by ESD (electrostatic discharge) or CDE (cable discharge events). This is because the designated IC becomes more sensitive to the transient threats as the technology advances. As a result, HDMI designs often include additional transient protection to ensure the IC's reliability. Adding HDMI ESD protection is difficult, however, due to HDMI's sensitivity to signal integrity. Each additional device added to the signal line implies extra parasitic elements that can affect signal transmission.

Layout Guidelines for adding HDMI ESD Protection in Receiver Applications

High Definition Multimedia Interface (HDMI) video signals are transmitted on very high speed differential
pairs. These lines are susceptible to electrostatic discharge (ESD) either directly from a user or from
plugging a charged cable into the port. In order to ensure the functionality of this port, consumer
electronics manufacturers require that HDMI ports be ESD hardened, often to the IEC61000-4-2 ESD standard. A level 4 discharge would require withstanding a ±15kV air and ±8kV contact discharge. In order to meet this stringent standard, external protection devices at the port entrance are required.

Semtech ESD Protection Circuits for HDMI 1.3

Semtech circuit protection products provide robust ESD and CDE protection while preserving signal integrity in high-speed video and data interfaces such as Set Top Boxes (STB), DVD players, PCs, video cameras, gaming stations, and digital televisions.

View our product selector to compare and select parts for your HDMI ESD protection application.