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SY89540UMITR Datasheet(PDF) 8 Page - Micrel Semiconductor |
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SY89540UMITR Datasheet(HTML) 8 Page - Micrel Semiconductor |
8 / 14 page Micrel, Inc. SY89540U December 2007 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 8 AC Electrical Characteristics (7) VCC = 2.5V ±5%, TA = –40°C to +85°C, RL = 100Ω across each output pair, unless otherwise noted. Symbol Parameter Condition Min Typ Max Units fMAX Maximum Operating Frequency NRZ Data 3.2 4 Gbps tPD Propagation Delay Clock, VOUT ≥200mV 4 GHz IN-to-Q 280 380 480 Ω CONFIG-to-Q 350 800 tPD Tempco 160 fs/°C tS Set-up Time SIN-to-LOAD SOUT-to-LOAD LOAD-to-CONFIG CONFIG-to-LOAD 800 800 800 950 ps th Hold Time LOAD-to-SIN, LOAD-to-SOUT 800 ps tPW Minimum LOAD and CONFIG Pulse Width 800 ps tSKEW Output-to-Output Skew Part-to-Part Skew Note 8 Note 9 30 150 ps ps tJITTER Data Random Jitter (RJ) Deterministic Jitter (DJ) Note 10 Note 11 1 10 psRMS psPP Clock Cycle-to-Cycle Jitter Total Jitter (TJ) Note 12 Note 13 1 psRMS psPP Crosstalk-Induced Jitter Note 14 0.7 psRMS tr, tr Rise/Fall Times At full output swing (20% to 80%) 40 80 120 ps Notes: 7. High frequency AC-parameters are guaranteed by design and characterization. 8. Output to output skew is measured between two different outputs under identical transitions. Input voltage swing is ≥100mV. 9. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the respective inputs. 10. RJ is measured with a K28.7 comma detect character pattern, measured at 2.5Gbps/3.2Gbps. 11. DJ is measured at 2.5Gbps/3.2Gpbs, with both K28.5 and 2 23–1 PRBS pattern 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. TJ 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. 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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