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TFP410: How to configure Vref pin

Part Number: TFP410
Other Parts Discussed in Thread: TIDEP0040


My customer has a question about Vref pin in TFP410.


They want to configure Vref pin as high-swing 3.3V input signal level. 

Which is your recommendation among this ?

(A) D/S P.5 Pin Functions : "For high-swing 3.3-V input signal levels, VREF should be tied to VDD."

(B) D/S P.27 Figure 33 : VREF pulls up with 33k ohm.

(C) TIDEP0038, TIDEP0040 (TI Reference Design) : VREF pulls up with 510 ohm.

Best Regards,

Hiroshi Katsunaga