XRT83L314IB View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83L314IB' PDF : 84 Pages View PDF
XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
TABLE 5: TIMING SPECIFICATIONS FOR RCLK/RPOS/RNEG
PARAMETER
SYMBOL
MIN
TYP
MAX
RCLK Duty Cycle
RCDU
45
50
55
Receive Data Setup Time
RSU
150
-
-
Receive Data Hold Time
RHO
150
-
-
RCLK to Data Delay
RDY
-
-
40
RCLK Rise Time (10% to 90%)
RCLKR
-
with 25pF Loading
-
40
RCLK Fall Time (90% to 10%)
RCLKF
-
with 25pF Loading
-
40
UNITS
%
ns
ns
ns
ns
ns
NOTE: VDD=3.3V ±5%, TA=25°C, Unless Otherwise Specified
2.6.1 Receive Sensitivity
To meet Long Haul receive sensitivity requirements, the XRT83L314 can accept T1/E1/J1 signals that have
been attenuated by 43dB cable attenuation in E1 mode or 36dB cable attenuation in T1 mode without
experiencing bit errors, LOF, pattern synchronization, etc. Short haul specifications are for 12dB of flat loss in
E1 mode. T1 specifications are 655 feet of cable loss along with 6dB of flat loss in T1 mode. The XRT83L314
can tolerate cable loss and flat loss beyond the industry specifications. The receive sensitivity in the short haul
mode is approximately 4,000 feet without experiencing bit errors, LOF, pattern synchronization, etc. Although
data integrity is maintained, the RLOS function (if enabled) will report an RLOS condition according to the
receiver loss of signal section in this datasheet. The test configuration for measuring the receive sensitivity is
shown in Figure 11.
FIGURE 11. TEST CONFIGURATION FOR MEASURING RECEIVE SENSITIVITY
W&G ANT20
Network
Analyzer
Tx
Cable Loss
Rx
E1 = PRBS 215 - 1
T1 = PRBS 223 - 1
Rx
Flat Loss
XRT83L314
External Loopback
14-Channel
Tx
Long Haul LIU
20
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