S-Video composite video circuit protection
Video input / output circuit protection
Video signals used in super video and composite video formats typically vary between 0.5 and 2.0 Vp-p, with frequencies up to 5 MHz. At this frequency, the capacitance of the suppressor needs to be considered. Signal lines that need to be protected against ESD include single-core wires that transmit luminance and chrominance data for super video and composite video.
As shown in the figure on the left, it is recommended to use discrete multi-layer varistors for protection. Due to the analog nature of the video signal, it is not recommended to use a unipolar transient suppression diode array, as this may cut off the negative polarity part of the video signal.
In addition to the recommendations above, Ruilon's MLV portfolio offers other solutions. For example, if the manufacturing process cannot handle 0402 size components, a 0603 size device with equivalent properties can be selected.
Regulatory issues: IEC 61000-4-2 is the standard specification best suited for this interface. This test proves that the end product is not vulnerable to ESD.
Characteristics: Not applicable.
Application Warning: The F-type connector shown on the left is designed for display set-top box video circuits. If this type F connector is used for cable or satellite TV input, then you should pay attention to lightning surges, and you cannot use multi-layer varistors (MLVs). In this case, a gas discharge tube is required. For more information, check out the cable and satellite TV input pages.