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XRT73LC04AIV Datasheet(PDF) 2 Page - Exar Corporation

Part # XRT73LC04AIV
Description  4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT73LC04AIV Datasheet(HTML) 2 Page - Exar Corporation

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XRT73LC04A
2
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.2
TYPICAL APPLICATIONS
TRANSMIT INTERFACE CHARACTERISTICS:
• Accepts either Single-Rail or Dual-Rail data from
Terminal Equipment and generates a bipolar signal
from the line
• Integrated Pulse Shaping Circuit
• Built-in B3ZS/HDB3 Encoder (which can be dis-
abled)
• Contains Transmit Clock Duty Cycle Correction
Circuit on-chip
• Generates pulses that comply with the ITU-T G.703
pulse template (E3 applications)
• Generates pulses that comply with the DSX-3 pulse
template as specified in Bellcore GR-499-CORE
and ANSI T1.102_1993
• Generates pulses that comply with the STSX-1
pulse template as specified in Bellcore GR-253-
CORE
• Transmitter can be turned off in order to support
redundancy designs
RECEIVE INTERFACE CHARACTERISTICS:
• Integrated Adaptive Receive Equalization (optional)
and Timing Recovery
• Declares and Clears the LOS defect per ITU-T
G.775 requirements (E3 and DS3 applications)
• Meets Jitter Tolerance Requirements as specified
in ITU-T G.823_1993 (E3 Applications)
• Meets Jitter Tolerance Requirements as specified
in Bellcore GR-499-CORE (DS3 Applications)
• Declares Loss of Signal (LOS) and Loss of Lock
(LOL) Alarms
• Built-in B3ZS/HDB3 Decoder (which can be dis-
abled)
• Recovered Data can be muted while the LOS Con-
dition is declared
• Outputs either Single-Rail or Dual-Rail data to the
Terminal Equipment
• Receiver can be powered down in order to con-
serve power in redundancy designs
FIGURE 2. MULTICHANNEL ATM APPLICATION
ATM
Switch/
SAR
XRT74L74
RPOS
RNEG
RxLineClk
XRT71D04
XRT73LC04
RRPOS
RRNEG
RRClk
RPOS
RNEG
RxClk
RPOS
RNEG
RxClk
RTIP
RRing
TTIP
TRing
TPOS
TNEG
TxLineClk
MClk
TPOS
TNEG
TxClk
4 Channel E3/DS3 ATM
UNI
4 Channel E3/DS3 J/A
4 Channel E3/DS3 LIU
FIGURE 3. MULTISERVICE - FRAME RELAY APPLICATION
Frame
Relay
XRT72L58
RPOS
RNEG
RxLineClk
XRT71D04
XRT73LC04
RRPOS
RRNEG
RRClk
RPOS
RNEG
RxClk
RPOS
RNEG
RxClk
RTIP
RRing
TTIP
TRing
TPOS
TNEG
TxLineClk
MClk
TPOS
TNEG
TxClk
8 Channel E3/DS3 Framer
2 x 4 Channel E3/DS3 J/A
2 x 4 Channel E3/DS3 LIU


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