SM802112 Datasheet, PDF (7/12 Pages) Micrel Semiconductor – ClockWorks™ 3-Output, 480MHz/80MHz, Ultra-Low Jitter LVDS/CMOS Frequency Synthesizer

Micrel, Inc.
Application Information
REF_IN Input
For a 1V_P−P sine wave signal applied to REF_IN with the
part operating at 3.3V, AC couple REF_IN with a 50Ω
termination of 206Ω to V_DD and 66Ω to ground, close to
the input. This provides 50Ω Thevenin termination and a
DC voltage of 0.8V.
LVDS Outputs
LVDS outputs are to be terminated with 100Ω across Q
and /Q. For best performance load all outputs. You can
DC or AC-couple the outputs.
SM802112
LVCMOS Outputs
LVCMOS output Q2 and /Q2 are 80MHz complimentary
outputs to reduce switching noise. Terminate both
outputs with identical loads to minimize noise.
September 2011
7
M9999-091411-A
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