XRT73L04A Datasheet, PDF (2/65 Pages) Exar Corporation – 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT

XRT73L04A
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 2.0.3
TYPICAL APPLICATIONS
FIGURE 2. MULTICHANNEL ATM APPLICATION
ATM
S w itc h /
SAR
RPOS
RNEG
R xLin eC lk
RRPOS
RRNEG
RRClk
RPOS
RNEG
R xC lk
RPOS
RNEG
RxClk
RTIP
R R in g
XRT72L74
TPOS
TNEG
T xLin eC lk
4 Channel DS3 ATM UNI
XRT71D04
MClk
4 Channel E3/DS3 J/A
XRT73L04A
TPOS
TNEG
TxClk
TTIP
TRing
4 Channel E3/DS3 LIU
FIGURE 3. MULTISERVICE - FRAME RELAY APPLICATION
F ram e
Relay
RPOS
RNEG
RxLineClk
RRPOS
RRNEG
RRClk
RPOS
RNEG
RxClk
RPOS
RNEG
RxClk
RTIP
RRing
XRT72L58
TPOS
TNEG
TxLineClk
XRT71D04
MClk
XRT73L04A
TPOS
TNEG
TxClk
TTIP
TRing
8 Channel E3/DS3 Framer 2 x 4 Channel E3/DS3 J/A 2 x 4 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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