謾莽
SEPTEMBER 2001
XRT71D00
E3/DS3/STS-1 JITTER ATTENUATOR
REV. 1.2.0
GENERAL DESCRIPTION
The XRT71D00 is a single channel, single chip Jitter
Attenuator, that meets the Jitter transfer characteristic
requirements specified in the ETSI TBR-24, Bellcore
GR-499-CORE and GR-253-CORE standards.
In addition, the XRT71D00 also meets the Output Jit-
ter and Wander specifications described in the ANSI
T1.105.03b 1997, Bellcore GR-253-CORE and GR-
499-CORE standards.
FEATURES
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Meets E3/DS3/STS-1 jitter transfer requirements
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No external components required
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Compliant with the jitter transfer characteristic
requirements specified in ITU G.751, G.752, and
G.755 for E3 applications
F
IGURE
1. B
LOCK
D
IAGRAM OF THE
XRT71D00
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Meets jitter transfer characteristic requirement as
specified by ETSI TBR24 (for E3 applications).
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Meets the Output Jitter and Wander specifications
described in ANSI T1.105.03b, Bellcore GR-253-
CORE and Bellcore GR-499-CORE standards.
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Selectable buffer size of 16 and 32 bits
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Jitter attenuator can be disabled
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Available in a 32 pin TQFP package.
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Single 3.3V or 5.0V supply.
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Operates over - 40
0
C to 85
0
C temperature range.
APPLICATIONS
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E3/DS3 Access Equipment.
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DSLAMs
BWS
Timing Control Block /
Phase locked Loop
MClk
ICT
DJA
RClk
ClkES
RPOS
RNEG
Write Clock
Read Clock
RRClk
RRPOS
16/32 Bit FIFO
RRNEG
FL
HOST/HW
Reset
E3/DS3
Microprocessor Serial
Interface
CS
SDI
SDO SClk
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
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(510) 668-7000
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FAX (510) 668-7017
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