si5018 Silicon Laboratories, si5018 Datasheet - Page 14

• Manufacturer Part Number: si5018
• Description: Siphy? Oc-48/stm-16 Clock And Data Recovery Ic With Fec
• Manufacturer: Silicon Laboratories

Si5018
4.11. Differential Output Circuitry
The Si5018 utilizes a current mode logic (CML) architecture to output both the recovered clock (CLKOUT) and data
(DOUT). An example of output termination with ac coupling is shown in Figure 9. In applications in which direct dc
coupling is possible, the 0.1 μF capacitors may be omitted. The differential peak-to-peak voltage swing of the CML
architecture is listed in Table 2 on page 6.
14
Figure 9. Output Termination for DOUT and CLKOUT (AC Coupled)
100
100
Si5018
Ω
Ω
V DD
V DD
DOUT +,
CLKOUT +
DOUT –,
CLKOUT –
Rev. 1.3
0.1
0.1
μ
μ
F
F
Z o = 50
Z o = 50
Ω
Ω
50
50
Ω
Ω
V DD
V DD