Hello, I am using the 65MLVD201 MLVDS transceiver in two applications
Application 1)
I have 4 backplane connected cards in which one card has an always enabled 65MLVD201 driver driving a MLVDS pair and 3 cards have 65MLVD201 recievers connected to that same pair. The 3 backplane connected cards always have their receivers enabled and do not assert this line. What should be the total equivalent Rt on this line for the assuming the furthest receiver has the Rt ?
What signal levels should I see with this value of Rt (term resistor) using this 65MLVD201 arrangement (e.g. using the Receiver voltage diagram below from 65MLVD201 datasheet)
Application 2)
same 4 backplane connected cards in which one card has an always enabled 65MLVD201 receiver receiving a different MLVDS pair and 3 cards have 65MLVD201 drivers connected to that same pair. The 3 backplane connected cards have their drivers enabled such that their is no (never) contention on the MLVDS bus.
What should be the total equivalent Rt on this line for the assuming the furthest receiver has the Rt ?
What signal levels should I see with this value of Rt (term resistor) using this 65MLVD201 arrangement (e.g. using the Receiver voltage diagram below from 65MLVD201 datasheet)
I have made measurements with Rt=100 Ohms (application 1 and 2) and have found that the 65MLVD201 pins do not diverge (e.g. they track) when driving 100 ohms but when Rt=50 Ohm I see what appears to be correct MLVDS levels. Can TI explain this ?
Thanks, Tom