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SY89229U Datasheet(PDF) 6 Page - Micrel Semiconductor |
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SY89229U Datasheet(HTML) 6 Page - Micrel Semiconductor |
6 / 16 page Micrel, Inc. SY89228U August 2007 M9999-080707-A hbwhelp@micrel.com or (408) 955-1690 6 AC Electrical Characteristics (8) VCC = 2.5V ±5% or 3.3V ±10%; RL = 50Ω to VCC-2V; TA = –40°C to + 85°C, unless otherwise stated. Symbol Parameter Condition Min Typ Max Units fMAX Maximum Input Operating Frequency VOUT ≥ 200mV 1.0 1.5 GHz tw Minimum Pulse Width IN, /IN 400 ps Differential Propagation Delay In-to-Q 100mV < VIN ≤ 200mV, Note 9 900 1150 1500 ps In-to-Q 200mV < VIN ≤ 800mV, Note 9 800 1050 1400 ps tpd /MR(H-L)-to-Q 350 570 850 ps tRR Reset Recovery Time /MR(L-H)-to-IN 300 ps tS EN Set-up Time EN-to-IN Note 10 300 ps tH EN Hold Time IN-to-EN Note 10 800 ps tskew Part-to-Part Skew Note 10 450 ps Clock Random Jitter Note 11 1 psRMS Cycle-to-Cycle Jitter Note 12 1 psRMS tJITTER Total Jitter Note 13 10 psPP tr, tf Output Rise/Fall Time (20% to 80%) At full output swing. 100 270 ps Output Duty Cycle(÷ 3) Duty Cycle(input): 50%; f ≤1GHz; Note 14 46 54 % Output Duty Cycle(÷ 5) Duty Cycle(input): 50%; f ≤1GHz; Note 14 47 53 % Notes: 8. High-frequency AC-parameters are guaranteed by design and characterization. 9. The propagation delay is function of the rise and fall times at IN. Input tr / tf ≤ 300ps (20% to 80%). See “Typical Operating Characteristics” for details. 10. Set-up and hold times apply to synchronous applications that intend to enable/disable before the next clock cycle. For asynchronous applications, set-up and hold do not apply. 11. Random Jitter is measured with a K28.7 character pattern, measured at <fMAX. 12. Cycle-to-Cycle Jitter definition: the variation of periods between adjacent cycles, Tn – Tn-1 where T is the time between rising edges of the output signal. 13. Total Jitter definition: with an ideal clock input of frequency <fMAX, no more than one output edge in 10 12 output edges will deviate by more than the specified peak-to-peak jitter value. 14. For Input Duty Cycle different from 50%, see “Output Duty Cycle Equation” in “Functional Description” subsection. |
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