SI5317C-C-GMR Silicon Laboratories Inc, SI5317C-C-GMR Datasheet - Page 27

• Manufacturer Part Number: SI5317C-C-GMR
• Manufacturer: Silicon Laboratories Inc

Specifications of SI5317C-C-GMR

• Lead Free Status / RoHS Status: Supplier Unconfirmed

4.2. Output Clock Driver
The Si5317 has a flexible output driver structure that can drive a variety of loads, including LVPECL, LVDS, CML,
and CMOS formats. The signal format is selected for CKOUT output using the SFOUT [1:0] pins. This modifies the
output common mode and differential signal swing. See Table 2, “DC Characteristics” for output driver
specifications. The SFOUT [1:0] pins are three-level input pins with the states designated as L (ground), M (V
and H (V
When SFOUT = LH for CMOS, bypass mode is not supported.
For the CMOS setting (SFOUT = LH), both output pins drive single-ended in-phase signals and should be
externally shorted together to obtain the drive strength specified in Table 2, “DC Characteristics”.
DD
Figure 12. Typical CMOS Output Circuit (Tie CKOUTn+ and CKOUTn– Together)
). Table 12 shows the signal formats based on the supply voltage and the type of load being driven.
CKOUTn
Si5317
Table 12. Output Signal Format Selection (SFOUT)
Figure 11. Typical Differential Output Circuit
Z0 = 50 
SFOUT[1:0]
Z0 = 50 
All Others
CKOUTn
HM
MH
LM
ML
HL
LH
Si5317
Outputs Together for Greater Strength
Rev. 1.0
Low-swing LVDS
Optionally Tie CKOUTn
Signal Format
Reserved
Disabled
LVPECL
CMOS
LVDS
CML
CMOS
Logic
100 
Rcvr
Si5317
DD
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