XRT91L30IQ-F View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT91L30IQ-F' PDF : 39 Pages View PDF
xr
REV. 1.0.1
XRT91L30
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
3.8 Transmit Serial Output Control
The 622.08 Mbps STS-12/STM-4 or 155.52 Mbps STS-3/STM-1 transmit serial output is avaliable on TXOP/N
pins. The transmit serial output can be AC or DC coupled to an optical module or electrical interface. A
simplified DC coupling block diagram is shown in Figure 17.
FIGURE 17. TRANSMIT SERIAL OUTPUT INTERFACE BLOCK
TXOP
TXON
XRT91L30
STS-12/STM-4
or
STS-3/STM-1
Transceiver
VDD
120
Optical Module
82
Install terminators as close to
optical module transmit pins
Optical Fiber
NOTE: Some optical modules integrate AC coupling capacitors within the module. AC or DC coupling is largely specific to
system design and optical module of choice.
27
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