XRT73R12_07 Datasheet, PDF (38/89 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

XRT73R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.2
TABLE 8: DS3 PULSE MASK EQUATIONS
TIME IN UNIT INTERVALS
NORMALIZED AMPLITUDE
LOWER CURVE
-0.85 < T < -0.36
- 0.03
-0.36 < T < 0.36
·
0.5
1
+
sin



π_{2-- }
1
+
0----.-^{T-1---8--}



– 0.03
0.36 < T < 1.4
-0.85 < T < -0.68
-0.68 < T < 0.36
- 0.03
UPPER CURVE
0.03
·
0.5
1
+
sin



π_--
2


1
+
0----.-^{T-3---4--}



+ 0.03
0.36 < T < 1.4
0.08 + 0.407 x e^{-1.84[T-0.36]}
TABLE 9: DS3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-499)
PARAMETER
MIN
TRANSMITTER LINE SIDE OUTPUT CHARACTERISTICS
Transmit Output Pulse Amplitude
0.65
(measured with TxLEV = 0)
TYP
0.75
MAX
0.85
Transmit Output Pulse Amplitude
(measured with TxLEV = 1)
Transmit Output Pulse Width
0.90
1.00
1.10
10.10
11.18
12.28
Transmit Output Pulse Amplitude Ratio
0.90
1.00
1.10
Transmit Intrinsic Jitter
0.02
0.05
RECEIVER LINE SIDE INPUT CHARACTERISTICS
Receiver Sensitivity (length of cable)
900
1100
Jitter Tolerance @ 400 KHz (Cat II)
0.15
Signal Level to Declare Loss of Signal
Refer to Table 3
Signal Level to Clear Loss of Signal
Refer to Table 3
UNITS
V_pk
V_pk
ns
UI_pp
feet
UI_pp
NOTE: The above values are at TA = 25⁰C and V_DD = 3.3V ± 5%.
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