XRT75L04 Datasheet, PDF (22/57 Pages) Exar Corporation – FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER

XRT75L04
FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.4
3.0 LINE SIDE CHARACTERISTICS:
3.1 E3 line side parameters:
The XRT75L04 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
(Measured at secondary of the transformer)
0.90
1.00
Transmit Output Pulse Amplitude Ratio
0.95
1.00
Transmit Output Pulse Width
12.5
14.55
RECEIVER LINE SIDE INPUT CHARACTERISTICS
Receiver Sensitivity (length of cable)
1200
Interference Margin
-20
-16
Jitter Tolerance @ Jitter Frequency 800KHz
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
V_pk
ns
feet
dB
UI_PP
dB
dB
UI
UI
NOTE: The above values are at
TA = 25⁰C and V_DD = 3.3 V± 5%.
20