XRT75L02 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT75L02' PDF : 50 Pages View PDF
xr
REV. 1.0.3
XRT75L02
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
3.0 LINE SIDE CHARACTERISTICS:
3.1 E3 line side parameters:
The XRT75L02 line output at the transformer output meets the pulse shape specified in ITU-T G.703 for
34.368 Mbits/s operation. The pulse mask as specified in ITU-T G.703 for 34.368 Mbits/s is shown in Figure 7.
FIGURE 7. PULSE MASK FOR E3 (34.368 MBITS/S) INTERFACE AS PER ITU-T G.703
17 ns
(14.55 + 2.45)
V = 100%
8.65 ns
Nominal Pulse
50%
10%
0%
10%
14.55ns
12.1ns
(14.55 - 2.45)
20%
TABLE 3: E3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS
PARAMETER
MIN
TYP
TRANSMITTER LINE SIDE OUTPUT CHARACTERISTICS
Transmit Output Pulse Amplitude
0.90
(Measured at secondary of the transformer)
Transmit Output Pulse Amplitude Ratio
0.95
Transmit Output Pulse Width
12.5
RECEIVER LINE SIDE INPUT CHARACTERISTICS
1.00
1.00
14.55
Receiver Sensitivity (length of cable)
Interference Margin
Jitter Tolerance @ Jitter Frequency 800KHz
1200
-20
-16
0.15
0.30
Signal level to Declare Loss of Signal
Signal Level to Clear Loss of Signal
-15
Occurence of LOS to LOS Declaration Time
10
Termination of LOS to LOS Clearance Time
10
MAX
1.10
1.05
16.5
-35
255
255
UNITS
Vpk
ns
feet
dB
UIPP
dB
dB
UI
UI
NOTE: The above values are at
TA = 250C and VDD = 3.3 V± 5%.
18
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