I would agree given I worked on an Ethernet chipset back in 1988/9 keeping the PLL synched was not a problem. I can't remember what the maximum packet size we s

I would agree given I worked on an Ethernet chipset back in 1988/9 keeping the PLL synched was not a problem. I can't remember what the maximum packet size we supported was (my guess is 2048) but that was more of a buffering to SRAM and needing more space for counters. The datasheet for the NS8391 has no such requirement for PLL sync. https://archive.org/details/bitsavers_nationaldaDataCommunicationsLANUARTsHandbook_53722793/page/n73/mode/2up https://archive.org/details/bitsavers_nationaldaDataCommunic...