U3 can be damaged by plugging in breakout board when power is on

[jonnew]

The PCIe controller with onix-fmc-host attached is inside a computer and powered on when the breakout board is plugged via the shrunk-delta ribbon cable, U3 can become degraded and eventually fail catastrophically. This never occurs if the breakout board is plugged when power is off.

• Is there some way to keep this chip disabled until the breakout is detected?
• Would this even help? Given that this is a reciever, we need top probe the input lines during a hot plug in event to see what they are doing.

[jonnew]

@filcarv Potential drop in replacements to try:

• https://www.ti.com/lit/ds/slls490b/slls490b.pdf
• https://www.ti.com/lit/ds/symlink/sn65lvds9637.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1725031194981&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Fsn65lvds9637
• https://rocelec.widen.net/view/pdf/jfm1yhcaj1/ds90lv032a.pdf?t.download=true&u=5oefqw

[filcarv]

Could you check if these PN and cases are the right ones?

SN65LVDS33PWR 400 MBps SN65LVDS32PWR 100 Mbps DS90LV032ATMTCX/NOPB 400 Mbps

[jonnew]

Yes, here is my verification:

Original part: FIN1032MTCX

• TSSOP-16 4.4x5mm with 0.65mm pitch

Replacements:

1. SN65LVDS33PWR

   • TSSOP-16 4.4x5mm with 0.65mm pitch

2. SN65LVDS32PWR (datasheet says 150 Mbps, not 100)

   • TSSOP-16 4.4x5mm with 0.65mm pitch

3. DS90LV032ATMTCX/NOPB

   • TSSOP-16 4.4x5mm with 0.65mm pitch