MOD5234-200IR connector

[cegelec]

Hello,
does anybody know, how to connect the J3 connector (10pin) to the ethernet jack? Im not sure with those LED outputs. Can I power them (20mA each one LED) directly by the 2.5V voltage output form the MOD5234 (pin 3 and 6)?
How should I connect the LEDs?
1) pin 3 -> resistor -> LED anode -> LED cathode -> pin 9 (resp. pin 10)
2) pin 9 (resp. pin 10) -> resistor -> LED anode -> LED cathode -> ground
3) PWR (e.g. 3.3V) -> resistor -> LED anode -> LED cathode -> pin 9 (resp. pin 10)

Or any total different solution? I wasn't able to decode it from the datasheet...

Thank you very much!
Jan Mrazek

[lgitlitz]

There is no need to put in a resistor, there is already 220 ohm resistors between pins 9, 10 and the Ethernet PHY. You should connect pin3 to the anode and then Pin9(resp. pin 10) to the cathode.

[cegelec]

Thank You very much!

Jan Mrazek

[cegelec]

Hello,
as I think about that - is there any need to place some filter resistors and capacitors into the circuit, or is it prepared on the MOD5234. I mean e.g. 24R4 resistors in RX paths or 49R9 from TX to 2.5V and 10nF + 24R9 from RX to the 2.5V voltage... Or the only thing to do is to place the Ethernet jack with magnetics?

Jan Mrazek