SI53313 Datasheet, PDF (12/33 Pages) Silicon Laboratories – DUAL 1:5 LOW-JITTER, ANY-FORMAT BUFFER/LEVEL TRANSLATOR

Si53313
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
Si53313
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
Si53313
V_TERM = V_DDO – 2V
DC Coupled LVDS Termination
V_{DDO = 3.3V or 2.5V}
Standard
LVDS
Driver
50
100
50
CLKx
CLKx
V_DD
Si53313
DC Coupled HCSL Termination Scheme
V_{DDO = 3.3V}
33
50
Standard
HCSL Driver
33
50
50
50
V_DD
CLKx
CLKx
Si53313
Note: 33 Ohm series termination is optional depending on the location of the receiver.
Figure 5. Differential DC-Coupled Input Terminations
12
Rev. 1.0