W5500 POE and/or 4 Wire
Ethernet Chips
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Ethernet Chips
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RE: W5500 POE and/or 4 Wire
by peter ·
It is not necessary. But, We recommend to use like our reference.
The unused pairs(4-5, 7-8) with 49.9ohms are connected to the chassis ground(CGND) with a high voltage capacitor(4.7nF/2kV). Any ESD high voltage entering on these pairs will pass to chassis ground(CGND) without damaging the circuit or the device.
Thanks