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SY89852U 데이터시트(PDF) 6 Page - Micrel Semiconductor |
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SY89852U 데이터시트(HTML) 6 Page - Micrel Semiconductor |
6 / 13 page Micrel, Inc. SY89852U February 2007 M9999-021307-B hbwhelp@micrel.com or (408) 955-1690 6 AC Electrical Characteristics (8) VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to + 85°C, RL = 50Ω to VCC –2V, unless otherwise stated. Symbol Parameter Condition Min Typ Max Units fMAX Maximum Operating Frequency NRZ Data 2.5 3.2 Gbps Clock, VOUT ≥ 400mV 2.5 3.5 GHz tPD Propagation Delay IN-to-Q, /IN-to-Q SEL-to-Q VIN ≥ 100mV 140 100 230 250 340 400 ps ps tPD Tempco Differential Propagation Delay Temperature Coefficient 100 fs/ oC Data Random Jitter (RJ) Note 9 1 psRMS Deterministic Jitter (DJ) Note 10 10 psRMS Clock Cycle-to-Cycle Jitter Note 11 1 psPP Total Jitter Note 12 10 psRMS tJitter Crosstalk-induced Jitter Note 13 0.7 psRMS tr, tf Output Rise/Fall Time (20% to 80%) At full output swing. 50 100 180 ps Notes: 8. High-frequency AC-parameters are guaranteed by design and characterization. 9. Random jitter is measured with a K28.7 character pattern, measured at 2.5Gbps. 10. DJ is measured at 2.5Gbps, with both K28.5 and 2 23 – 1 PRBS pattern. 11. 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. 12. 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. 13. Crosstalk induced jitter is defined as the added jitter that results from signals applied to two adjacent channels. It is measured at the output while applying two similar, differential clock frequencies that are asynchronous with respect to each other at the inputs. |
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