TLK2711-SP: TXCLK Jitter

Dean Michal

Part Number: TLK2711-SP

As I know TXCLK maximum jitter of TLK2711 is 40ps.

I use RTG4 PLL clock(from 50MHz to 80MHz) for TLK2711's TXCLK.

Would it be okay?

0 Drew Miller1 over 3 years ago

Hi,

I assume you would be using the RTG4 PLL clock at 80 MHz? What is the jitter and logic levels of this clock?

Thanks,
Drew

0 Dean Michal over 3 years ago in reply to Drew Miller1

The RTG4 receives 50 MHz of the oscillator. And RTG4 generates 80MHz using PLL and outputs it to TXCLK of TLK2711.

Logic level is LVCMOS 2.5V.

Please refer to the below data of RTG4 PLL jitter.

0 Drew Miller1 over 3 years ago in reply to Dean Michal

Hi Dean,

The first part of the jitter calculation means that the RTG4 clock would not be suitable since the maximum jitter for TLK2711 TXCLK is 40 ps.

"Max(80 ps, 2% * (1/fin) )"

Thanks,
Drew

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