XRT73L03A Datasheet, PDF (2/62 Pages) Exar Corporation – 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT

XRT73L03A
3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 2.0.4
TYPICAL APPLICATIONS
FIGURE 2. MULTICHANNEL ATM APPLICATION
ATM
Switch/
SAR
RPOS
RNEG
RxLineClk
RRPOS
RRNEG
RRClk
RPOS
RNEG
RxClk
RPOS
RNEG
RxClk
RTIP
RRing
XRT72L73
TPOS
TNEG
TxLineClk
3 Channel DS3 ATM UNI
XRT71D03
MClk
3 Channel E3/DS3 J/A
XRT73L03
TPOS
TNEG
TxClk
TTIP
TRing
3 Channel E3/DS3 LIU
FIGURE 3. MULTISERVICE - FRAME RELAY APPLICATION
Frame
Relay
RPOS
RNEG
RxLineClk
RRPOS
RRNEG
RRClk
RPOS
RNEG
RxClk
RPOS
RNEG
RxClk
RTIP
RRing
XRT72L56
TPOS
TNEG
TxLineClk
XRT71D03
MClk
XRT73L03
TPOS
TNEG
TxClk
TTIP
TRing
6 Channel E3/DS3 Framer 2 x 3 Channel E3/DS3 J/A 2 x 3 Channel E3/DS3 LIU
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 Cir-
cuit 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
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