SI5347 Datasheet, PDF (37/59 Pages) Silicon Laboratories – DUAL/QUAD DSPLL ANY-FREQUENCY, ANY-OUTPUT JITTER ATTENUATORS

Si5347/46
5.8. Outputs
The Si5347 supports up to eight differential output drivers and the Si5346 supports four. Each driver has a
configurable voltage amplitude and common mode voltage covering a wide variety of differential signal formats
including LVPECL, LVDS, HCSL, and CML. In addition to supporting differential signals, any of the outputs can be
configured as single-ended LVCMOS (3.3 V, 2.5 V, or 1.8 V) providing up to 16 single-ended outputs, or any
combination of differential and single-ended outputs.
5.8.1. Output Crosspoint
A crosspoint allows any of the output drivers to connect with any of the DSPLLs as shown in Figure 24. The
crosspoint configuration is programmable and can be stored in NVM so that the desired output configuration is
ready at power-up.
Si5347A/B
Output
Crosspoint
A
B
C
÷R₀
D
DSPLL
A
A
B
C
÷R₁
D
A
B
C
÷R₂
D
DSPLL
B
A
B
C
÷R₃
D
DSPLL
C
A
B
C
÷R₄
D
DSPLL
D
A
B
C
÷R₅
D
A
B
C
÷R₆
D
A
B
C
÷R₇
D
VDDO0
OUT0
OUT0
VDDO1
OUT1
OUT1
VDDO2
OUT2
OUT2
VDDO3
OUT3
OUT3
VDDO4
OUT4
OUT4
VDDO5
OUT5
OUT5
VDDO6
OUT6
OUT6
VDDO7
OUT7
OUT7
Figure 24. Si5347A/B DSPLL to Output Driver Crosspoint
Rev. 1.1
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