Circuit protection of SCART interface
The 12 signal and control lines in the SCART interface need to be protected from ESD. The signals used by this interface include video signals (up to 5 MHz and 2.0Vp-p), audio signals (up to 30 kHz and 12Vp-p), and control signals (up to 3 MHz and 12V). For video and control lines, consider the capacitance of the suppressor.
As shown in the figure on the left, a discrete multi-layer varistor can be used to make the circuit board layout more flexible. These devices will meet the requirements for the capacitance of video and control lines and the off-state voltage of audio lines.
In addition to the recommendations above, the Ruilon portfolio offers other solutions. For example, if you want to use an array layout to reduce the number of parts, consider using a product like RLST236A054LV.
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: Not applicable.