Table 5.4. LVPECL Termination, Option 2
VDD Standard
Resistance
Resistance Value
2.5
R1
50
R2
50
R3
29.5
3.3
R1
50
R2
50
R3
54 or 0
HCSL
driver
1.71 V to 3.46 V
OUTx
OUTx
Zo = 42.5 Ω
or 50 Ω
HCSL
receiver
Zo = 42.5 Ω
or 50 Ω
Figure 5.7. HCSL Internal Termination Mode
HCSL
driver
1.71 V to 3.46 V
OUTx
OUTx
Zo = 42.5 Ω
or 50 Ω
HCSL
receiver
Zo = 42.5 Ω
or 50 Ω
R
T
= Zo
R
T
= Zo
Figure 5.8. HCSL External Termination Mode
Si5332-AM1/2/3 Automotive Grade Device Reference Manual
Output Clock Terminations
silabs.com
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