XRT7302IQ80 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7302IQ80' PDF : 77 Pages View PDF
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2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7302
REV. 1.1.0
ELECTRICAL CHARACTERISTICS (CONTINUED) (TA = 250C, VDD = 5V + 5%, UNLESS OTHERWISE SPECIFIED)
AC ELECTRICAL CHARACTERISTICS (SEE FIGURE 1)
TERMINAL SIDE TIMING PARAMETERS (SEE FIGURES 2 AND 3)
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNITS
tTDY TTIP1, 2/TRing1, 2 to TxClk1, 2 Rising Propagation Delay time
0.6
RxClk1, RxClk2 Clock Duty Cycle
45
14.0
ns
50
55
%
RxClk1, RxClk2 Frequency (SONET STS-1)
51.84
MHz
RxClk1, RxClk2 Frequency (DS3)
44.736
MHz
RxClk1, RxClk2 Frequency (E3)
34.368
MHz
tCO RxClk1, 2 to RPOS1, 2/RNEG1, 2 Delay Time
4.0
ns
tRRX RxClk1, RxClk2 Clock Rise Time (10% to 90%)
2.0
4.0
ns
tFRX RxClk1, RxClk2 Clock Fall Time (10% to 90%)
CI
Input Capacitance
CL Load Capacitance
1.5
3.0
ns
10
pF
10
pF
ELECTRICAL CHARACTERISTICS (CONTINUED), (TA = 250C, VDD = 5V + 5%, UNLESS OTHERWISE SPECIFIED)
LINE SIDE PARAMETERS E3 APPLICATION
TRANSMIT CHARACTERISTICS (SEE FIGURE 2)
SYMBOL
PARAMETER
Transmit Output Pulse Amplitude
(Measured at Secondary Output of Transformer, see Figure 1)
Transmit Output Pulse Amplitude Ratio
Transmit Output Pulse Width
Transmit Output Pulse Width Ratio
Transmit Output Jitter with jitter-free input @ TxClk(n)
MIN.
0.9
0.95
12.5
0.95
TYP.
1.0
1.00
14.55
1.00
0.02
MAX
1.1
1.05
16.5
1.05
0.05
UNITS
Vpk
ns
UIpp
Receive Line Characteristics (See Figure 3)
Receive Sensitivity (Length of cable)
1100
feet
Interference Margin
-20
-17
dB
Signal Level to Declare Loss of Signal
-35
dB
Signal Level to Clear Loss of Signal
-15
dB
Occurrence of LOS to LOS Declaration Time
10
100
255
UI
Termination of LOS to LOS Clearance Time
10
100
255
UI
Intrinsic Jitter (all “Ones” Pattern)(1)
0.01
UI
Intrinsic Jitter (all “100” Pattern)
0.03
UI
19
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