txn31011 ETC-unknow, txn31011 Datasheet - Page 9

• Manufacturer Part Number: txn31011
• Description: Txrx Opt Sff 2/1gbps 850nm Multi
• Manufacturer: ETC-unknow

3.0
3.1
Figure 2.
Datasheet
Termination
The TXN31011 Optical Transceiver has the following two types of I/O interfaces:
The high speed I/Os use the CML interface, while the control signals use the TTL interface. Proper
termination is critical to ensure good signal integrity. Without the proper termination (particularly
on the CML I/Os), jitter increases significantly due to reflection from the impedance mismatches.
CML Termination
AC-coupling capacitors are built into the TXN31011 Optical Transceiver.
Circuit Diagram for CML Termination on Receiver Output
Most of the SerDes comes with the internal termination resistor. Please check the SerDes
specification sheet for proper external termination.
•
•
CML Interface
TTL Interface
Intel
3.3V
®
50Ω
Module Rx output
TXN31011 Tri-rate LC SFF Optical Transceiver
Order Number: 280050, Revision: 003
Intel
®
TXN31011 Tri-rate LC SFF Optical Transceiver
AC-coupling
capacitor
100Ω
Serdes input
07 Feb 2005
9