SI5110 Silicon Storage Technology Inc, SI5110 Datasheet - Page 15

• Manufacturer Part Number: SI5110
• Description: SiPHY OC-48/STM-16 SONET/SDH TRANSCEIVER
• Manufacturer: Silicon Storage Technology Inc

Transmit Differential Output Circuitry
The Si5110 utilizes a current-mode logic (CML) architecture to drive the high speed serial output clock and data on
TXCLKOUT and TXDOUT. An example of output termination with ac coupling is shown in Figure 4. In applications
where direct dc coupling is possible, the 0.1 F capacitors may be omitted. The differential peak-to-peak voltage
swing of the CML architecture is listed in Table 2 on page 5.
Figure 4. CML Output Driver Termination (TXCLKOUT, TXDOUT)
50
1.5 V
24 mA
50
Preliminary Rev. 0.41
0.1 F
0.1 F
Zo = 50
Zo = 50
VDD
VDD
50
50
Si5110
15