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XRT83L34 Datasheet(PDF) 8 Page - Exar Corporation

Part # XRT83L34
Description  QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT83L34 Datasheet(HTML) 8 Page - Exar Corporation

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XRT83L34
xr
REV. 1.0.1
QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
5
PIN DESCRIPTION BY FUNCTION
RECEIVE SECTIONS
SIGNAL NAME
PIN #
TYPE
DESCRIPTION
RLOS_0
RLOS_1
RLOS_2
RLOS_3
4
28
75
99
O
Receiver LOS (Loss of Signal) Defect Indicator Output for Channel _n
This output pin indicates whether or not the Receive Section associated with
Channel n (within the LIU device) is declaring the LOS defect condition, as
depicted below.
LOGIC LOW - Indicates that this particular channel is currently not declaring
the LOS defect condition.
LOGIC HIGH - Indicates that this particular channel is currently declaring the
LOS defect condition.
See “Receiver Loss of Signal (RLOS)” on page 28.
RCLK_0
RCLK_1
RCLK_2
RCLK_3
5
27
76
98
O
Receiver Clock Output for Channel _n
The Receive Section (of a given channel within the XRT83L34 device) will
update the RPOS_n and RNEG_n/LCV_n output pins upon either the rising
or falling edge of this output clock signal (depending upon user configura-
tion).
RNEG_0/
LCV_0
RNEG_1/
LCV_1
RNEG_2/
LCV_2
RNEG_3/
LCV_3
6
26
77
97
O
Receiver Negative-Polarity Data Output/Line Code Violation Indicator
Output - Channel n:
The exact function of this output pin depends upon whether the XRT83L34
device has been configured to operate in the Single-Rail or Dual-Rail Mode,
as described below.
Dual-Rail Mode Operation - Receive Negative-Polarity Data Output -
RNEG_n:
The Receive Section of Channel n will output the negative-polarity portion of
the recovered incoming DS1/E1 data (from the remote terminal equipment)
via this output pin. Each channel (within the XRT83L34 device) will update
this incoming DS1/E1 data upon the "user-selected" edge of the RCLK_n
output signal.
The "Positive-Polarity Portion" of the recovered incoming DS1/E1 data will
be output via the RPOS_n output pin.
Single-Rail Mode Operation - Line Code Violation Indicator Output -
LCV_n:
The Receive Section of Channel n will pulse this output pin "high" (for one
RCLK_n period) each time it detects a Line Code Violation within the incom-
ing DS1/E1 line signal. Each channel (within the XRT83L34 device) will
update this output pin upon the "user-selected" edge of the RCLK_n output
signal.


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