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XRK69772CR Datasheet(PDF) 5 Page - Exar Corporation |
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XRK69772CR Datasheet(HTML) 5 Page - Exar Corporation |
5 / 12 page PRELIMINARY XRK69772 5 REV. P1.0.0 1:12 LVCMOS PLL CLOCK GENERATOR TABLE 4: AC CHARACTERISTICS (VDD = 3.3V +/- 5%) SYMBOL CHARACTERISTICS CONDITION MIN TYP MAX UNIT fREF Input reference frequencya ÷4 feedback ÷6 feedback ÷8 feedback ÷10 feedback ÷12 feedback ÷16 feedback ÷20 feedback ÷24 feedback ÷32 feedback ÷40 feedback PLL bypass mode 50.0 33.3 25.0 20.0 16.6 12.5 10.0 8.33 6.25 5.00 120 80.0 60.0 48.0 40.0 30.0 24.0 20.0 15.0 12.0 250 MHz MHz MHz MHz MHz MHz MHz MHz MHz MHz MHz fVCO VCO frequency range 200 480 MHz fXTAL Crystal input frequency range 10 25 MHz fMAX Output frequencya ÷2 output ÷4 output ÷6 output ÷8 output ÷10 output ÷12 output ÷16 output ÷20 output ÷24 output 100.0 50.0 33.3 25.0 20.0 16.6 12.5 10.0 8.33 240.0 120.0 80.0 60.0 48.0 40.0 30.0 24.0 20.0 MHz MHz MHz MHz MHz MHz MHz MHz MHz fSTOP_CLK Serial interface max. frequency 20.0 MHz tPW CLKx pulse min. width 2.0 ns ItR, ItF Input CLKx Rise/Fall time 0.8V to 2.0V 1.0 ns t(∅) Propagation Delay (static phase offset) CLKx to FB_INb 6.25MHz < fREF < 65.0MHz 65.0MHz < fREF < 125MHz fREF = 50MHz & FB = ÷8 -3 -4 -166 +3 +4 +166 ° ° ps tSK(O) Output to output skewc Bank A (QAx to QAy) Bank B (QBx to QBy) Bank C (QCx to QCy) all outputs (QXy to QWz) 100 100 100 250 ps ps ps ps DC Output duty cycled (T÷2)-200 T÷2 (T÷2)+200 ps OtR, OtF Output Rise/Fall time 0.55V to 2.4V 0.1 1.0 ns |
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