w5300 impedance matching

Question

hi all. I’m designing a pcb board with spartan-6 and w5300 TCP/IP module. in datasheet of w5300 say’s for better impedance matching you have to place 50ohm res and 0.1uf cap like the picture image755×402 19.2 KB . I’m using HR911105A rj-45 connector with magnetic module. this connector uses 75ohm resistor and 1000pf cap datasheet of HR91115A my question is despite the 75 ohm resistor’s and 1000pf capacitors in this connector do i still need to place 50 ohm and 100nf cap?

Eugeny · Answer

Amin_Naderi: in datasheet of w5300 say’s for better impedance matching you have to place 50ohm res 50 Ohm? There’re no such resistors in the circuit. Amin_Naderi: my question is despite the 75 ohm resistor’s and 1000pf capacitors in this connector do i still need to place Yes, you still need to place these components because they are located in different part of the circuit.