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LMX2594: SYSREF voltage logic levels

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Part Number: LMX2594

Hello,

Regarding the LMX2594 device,

What are the voltage logic levels of the SYSREF output?

The datasheet mentions at section 7.3.14.2.2 (page 37):

"The SYSREF output comes in differential format through RFoutB. This will have a minimum voltage of about 2.3 V and a maximum of 3.3 V."

Does it mean that each pin of the differential signal (P,N) swings between 2.3V and 3.3V (2.8V+-0.5V)?

Are there specific values of  Vol_min , Voh_max , vod_min/max?

Thanks!