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SIT3921 Datasheet(PDF) 7 Page - SiTime Corp.

No. de pieza SIT3921
Descripción Electrónicos  Digitally Controlled Differential Oscillator (DCXO)
PDF  12 Pages
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Fabricante Electrónico  SITIME [SiTime Corp.]
Página de inicio  https://www.sitime.com
Logo SITIME - SiTime Corp.

SIT3921 Datasheet(HTML) 7 Page - SiTime Corp.

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The Smart Timing Choice
The Smart Timing Choice
SiT3921
Digitally Controlled Differential Oscillator (DCXO)
Rev. 1.1
Page 7 of 12
www.sitime.com
Termination Diagrams
LVPECL:
Z0 = 50
Z0 = 50
D+
D-
OU T+
OU T-
50
VTT = V D D – 2.0 V
Drive Device
Receiver Device
50
VDD
D+
D-
OUT+
OUT-
Drive Device
Receiver Device
Z0 = 50
Z0 = 50
R1
50
50
R1
VTT
100 nF
100 nF
R1 = 100 to 150
VDD
Z0 = 50
Z0 = 50
D+
D-
OUT+
OUT-
Drive Device
Receiver
Device
R1
R2
R3
R4
VDD
VDD = 3.3V => R1 = R3 = 133
 and
R2 = R4 = 82
VDD = 2.5V => R1 = R3 = 250
 and
R2 = R4 = 62.5
VDD
Figure 9. LVPECL Typical Termination
Figure 10. LVPECL AC Coupled Termination
Figure 11. LVPECL with Thevenin Typical Termination



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