Hi all,I'm looking for diodes to protect some CAN lines from ESD, and stumbled across a device produced by NXP, specifically for protecting CAN bus lines from ESD - and is advertised specifically as having ultra low capacitance.Here's the device http://www.nxp.com/documents/data_sheet/PESD2CAN.pdfSo, max 30pF at 1MHz, VR = 0V.Take a bog standard 1N4148http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdfMax 4pF at 1MHz, VR = 0V.So, am I missing a trick? What's so special about these ESD 'low capacitance' protection diodes? They have higher capacitance than everyday use diodes?
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