SI53315 Datasheet, PDF (11/30 Pages) Silicon Laboratories – 1:10 LOW JITTER UNIVERSAL BUFFER/LEVEL

Si53315
V_DDO
DC Coupled LVPECL Termination Scheme 1
V_{DDO = 3.3V or 2.5V}
R₁
R₁
“Standard”
50
LVPECL
Driver
50
CLKx
/CLKx
V_DD
Si533xx
3.3V LVPECL: R₁ = 127 Ohm, R₂ = 82.5 Ohm
2.5V LVPECL: R₁ = 250 Ohm, R₂ = 62.5 Ohm
R₂
R₂
V_TERM = V_DDO – 2V
R₁ // R₂ = 50 Ohm
DC Coupled LVPECL Termination Scheme 2
V_{DDO = 3.3V or 2.5V}
“Standard”
50
LVPECL
Driver
50
50
50
CLKx
/CLKx
V_DD
Si533xx
V_TERM = V_DDO – 2V
DC Coupled LVDS Termination
V_{DDO = 3.3V or 2.5V}
Standard
50
LVDS
Driver
50
CLKx
/CLKx
100
V_DD
Si533xx
DC Coupled HCSL Termination Scheme
V_{DDO = 3.3V}
33
50
Standard
HCSL Driver
33
50
50
50
V_DD
CLKx
/CLKx
Si533xx
Note: 33 Ohm series termination is optional depending on the location of the receiver.
Figure 3. Differential DC-Coupled Input Terminations
Preliminary Rev. 0.4
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