SI5345-44-42 Datasheet, PDF (39/62 Pages) Silicon Laboratories – 10-CHANNEL

Si5345/44/42
5.8.3. Differential Output Terminations
Note: In this document, the terms, LVDS and LVPECL, refer to driver formats that are compatible with these signaling
standards.
The differential output drivers support both ac coupled and dc coupled terminations as shown in Figure 23.
DC Coupled LVDS/LVPECL
VDDO = 3.3V, 2.5V, 1.8V
Si5345/44/42
OUTx
OUTx
50
100
50
AC Coupled LVDS/LVPECL
VDDO = 3.3V, 2.5V, 1.8V
50
OUTx
OUTx
100
50
Si5345/44/42
Internally
self-biased
AC Coupled LVPECL
VDD – 1.3V
VDDO = 3.3V, 2.5V
50
50
OUTx
50
OUTx
50
Si5345/44/42
Figure 23. Supported Differential Output Terminations
5.8.4. LVCMOS Output Terminations
LVCMOS outputs are dc-coupled as shown in Figure 24.
VDDO = 3.3V, 2.5V, 1.8V
OUTx
Rs
OUTx
3.3V, 2.5V, 1.8V
LVCMOS
50
Si5345/44/42
50
Rs
Figure 24. LVCMOS Output Terminations
Rev. 1.0
39