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Does the DS125DF410 support Sonet?

Travis Lantz
Prodigy 40 points
Other Parts Discussed in Thread: DS125DF410

In Table 1 of the data sheet, there is no register setting for Sonet (9.953) operation?  Does the DS125DF410 support additional data rates besides those shown in Table 1?

  • 0
    TI__Expert 3050 points

    Hi Travis,

    The data rates shown in table 1 are only the pre-programmed data rates. If you continue reading that same page, the datasheet explains how to program for other data rates that are not listed in standards based rate/sub-rate table. The DS125DF410 will support any data rate with its VCO range plus the divide by 2, 4, and 8 data rate ranges of the VCO range. The VCO range for this part is 9.8 Gbps to 12.5 Gbps.

    This does not mean that the device will support every protocol that uses a supported data rate. Some protocols require that the links cycle through legacy data rates as part of an auto negotiation process. Other protocols require very specific performance parameters, such as eye masks, jitter, lock time, etc. These parameters can vary by standard and the version of that standard.

    We do not currently test or recommend the DS125DF410 for SONET applications, but you can use the datasheet specs to compare against your application requirements.

    Mike Wolfe

    DPS APPS / SVA