Tool/software:
Background: We are using about (6) of these devices on one of our product's. Running SATA at 6Gbps. At room temp. file transfers work fine using FileZilla.
When we operate at -30C, once in a while we loss link (while transferring files, could be the 3rd or 20th file, its random), and resetting the SATA link interface corrects this. Our customer cannot accept this.
All our traces are very nicely routed, before and after the re-driver the trace lengths are < 4". Max of (2) via's per trace length from source to destination.
We use 10nF (TDK Corporation CGA2B3X7R1H103K050BB) SATA AC cap's.
Questions:
1. Considering we are running at 6Gbps, should we consider using specialized RF cap's like V30BZ102M6SX (which have very low insertion losses at freq. >> 6Gbps).
Would operating at -30C make it critical to use RF AC cap's?
When we run at -30C, 3Gbps, we do not have this issue. Nowhere in TI data sheet's, even for 8Gbps re-driver chips, does TI recommend to use RF AC capacitors.
2. We have resistor options to pull-up the EQ and DE pins. We have left them floating. Is there a danger that leaving them floating, at -30C, the internal EQ or DE changes states, because this pin is left floating? It would be very painful for us to pull-down these pins on (6) devices. We need a definite clear answer on this question, based upon how the internal pull-down operates over temp within the re-driver chip.
Thanks
