Original question:
Hi team,
My customer has some concern about HD3SS3202,
In datasheet, there is no ac coupling capacitor in red circle.
but Microchip's hub need to add the capacitor in the TX, my customer wants to know, do he need to add the ac coupling capacitor in pin 4 and pin 5?
HI Brian,
I am confused about the datasheet. in datasheet only B0+, B0-,C0+,C0- added the AC cap.
A0+,A0-.A1+,A0-,B1+,B1-,C1+,C1- not add the AC cap. Should I follow the datasheet?
You just said I need to add AC cap on pin 4/5 or pin 11/12 and pin 7/8.
Only TX need to add AC cap? or both need to add AC cap.
Do you think the schematic of my customer is correct?
Jason
HI Brian,
Thanks.
I have one thing that confused me.
1.) Only Tx need to add AC cap or TX, RX both could add the cap. because in the red circle, TX and RX both do not add the ac cap.
Jason
between each TX/RX pair, only one AC cap 75nf to 220nf needed.
normally place AC cap on TX for each USB host or device.
Mux is path between TX/RX, you can place cap either side of mux.
