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XRT7298
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ORDERING INFORMATION
Part No.
Package
Operating
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BLOCK DIAGRAM
Figure 1. XRT7298 Block Diagram
XRT7298
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PIN CONFIGURATION
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PIN DESCRIPTION
Pin #
Symbol
T ype
Description
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Receive Clock Input.
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PIN DESCRIPTION (CONT'D)
Pin #
Symbol
T ype
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Note:
1
If a bipolarviolationoccurs,RPOS andRNEG cancorrespondto thedecodedversions of RNDAT A andRPDAT A respectively
. If
DECODIS is high,RPOS andRNEG alwaystrackRPDAT A andRNDAT A respectively
.
XRT7298
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ELECTRICAL
CHARACTERISTICS
(See Figure 8 )
T est Conditions: V
DD
= 5V
5%, T
A
= -40
GC to +85GC, unless otherwise specified. All timing characteristics
are measured with 10pF loading.
Symbol
Parameter
Min.
T yp.
Max.
Units
AC Electrical Characteristics
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Notes:
1
Whentheencoderis enabled,a handlingdelayof six TCLK clockcyclesfor B3ZS andseven clockcyclesfor HDB3
alwaysexists betweenTPDA T A/TNDAT A andTTIP/TRING. The handlingdelayis reducedtothreeanda halfcycleswhentheen
coderis disabled.
2
Whenthedecoderis enabled,a handlingdelayof six anda halfRCLK clockcycleswill alwaysexist betweenRPDAT A/RNDAT A
andRPOS/RNEG. The handlingdelayis reducedto oneandhalfRCLK clockcycleswhenthedecoderis disabled.
3
Supply currentis measuredwithtransmittersendingall ones AMI signal andwithT ransmit Level (TXLEV) set to high.
4
All inputs exceptpin 19, 20 andpin 26.
Specifications are subject to changewithout notice
XRT7298
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ABSOLUTE
MAXIMUM RATINGS
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Note:
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T ransformer= Pulse EngineeringPE 65966, PE 65967
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E3.
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Notes
:
1
The pulse templateproposedby G.703 standardsis shownin Figure 4 andspecifiedin T able4 The proposedG.703 standards
furtherstatethatthevoltagein atimeslot containinga0 must notexceed
p5% of thepeakpulse amplitude,exceptfortheresidue
of precedingpulses.
2
The powerlevels specifiedbytheproposedG.703 standardsareidenticalexceptthatthepoweris tobe measuredin 3kHz bands.
3
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