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XRT83SL314 Datasheet(PDF) 44 Page - Exar Corporation

Part # XRT83SL314
Description  14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
PDF  83 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT83SL314 Datasheet(HTML) 44 Page - Exar Corporation

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XRT83SL314
xr
REV. 1.0.1
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
41
the interrupt pin to go "Low". Once the status register is read, the interrupt pin will return "High" and the status
register will be reset (RUR).
4.8
Line Termination (TTIP/TRING)
The output stage of the transmit path generates standard return-to-zero (RZ) signals to the line interface for T1/
E1/J1 twisted pair or E1 coaxial cable.
The physical interface is optimized by placing the terminating
impedance inside the LIU. This allows one bill of materials for all modes of operation reducing the number of
external components necessary in system design.
The transmitter outputs only require one DC blocking
capacitor of 0.68µF. For redundancy applications (or simply to tri-state the transmitters), set TxTSEL to a "1" in
the appropriate channel register. A typical transmit interface is shown in Figure 37.
FIGURE 37. TYPICAL CONNECTION DIAGRAM USING INTERNAL TERMINATION
T
TIP
T
RING
XRT83SL314 LIU
1:2
Internal Impedance
Line Interface T1/E1/J1
C=0.68uF
One Bill of Materials
Transmitter
Output



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