Opal Kelly issues this PCN to existing customers of the listed product(s) to inform them of changes and/or updates that may affect current inventory or current and future applications of the product.

17 May 2023

The following items are affected by this PCN:

1. BRK7360

PCB revisions BXX and later are affected by this PCN. Revisions 20151022 and earlier are not affected by this change. The PCB revision is indicated in silkscreen in the location shown below.

Revisions 20151022 and earlier are not affected.

Revisions BXX and later are affected.

Many common Ethernet protocols that may be used with the SFP ports are incompatible with a 100Mhz RefClk. A more useful frequency for Ethernet protocols is 156.25Mhz.

Change the 100Mhz oscillator on the BRK7360 that is connected to GTX 115 RefClk 0 to a 156.25Mhz oscillator.

Any applications that require a 100Mhz refclk can instead use the 100Mhz clock provided onboard the XEM7360 for GTX 115 RefClk 1.