XRT71D04 Datasheet, PDF (1/22 Pages) Exar Corporation – 4 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER

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XRT71D04
4 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER
APRIL 2001
REV. 1.1.1
GENERAL DESCRIPTION
The XRT71D04 is a four channel, single chip Jitter At-
tenuator, that meets the Jitter transfer characteristic
requirements specified in the ETSI TBR-24, Bellcore
GR-499 and GR-253 standards.
In addition, the XRT71D04 also meets the Jitter and
Wander specifications described in the ANSI
T1.105.03b 1997, Bellcore GR-253 and GR-499 stan-
dards for Desynchronizing and Pointer adjustments in
the DS3 to STS-SPE mapping applications.
FEATURES
• Meets the E3/DS3/STS-1 jitter requirements
• No external components required
• Compliant with jitter transfer template outlined in
ITU G.751, G.752, G.755, GR-499-CORE,1995
GR-253-CORE standards
• Meets output jitter requirement as specified by
ETSI TBR24
• Meets the Jitter and Wander specifications
described in T1.105.03b,GR-253 and GR-499 stan-
dards
• Selectable buffer size of 16 and 32 bits
• Jitter attenuator can be disabled
• Available in a 80 pin TQFP package
• Single 3.3V or 5.0V supply.
• Operates over - 40⁰ C to 85⁰ C temperature range.
APPLICATIONS
• E3/DS3 Access Equipment
• STS-SPE to DS3 Mapper
• DSLAMs
FIGURE 1. BLOCK DIAGRAM (ONE CHANNEL)
ICT
DJA_n
RClk_n
RClkES
RPOS_n
RNEG_n
FSS
MODE_CTRL
HOST
Reset
Timing Control Block /
Phase locked Loop
Write Clock
Read Clock
16/32 Bit FIFO
n = 0, 1, 2, 3
Channel 0
Channel 1
Channel 2
Channel 3
Microprocessor Serial
Interface
XRT71D04
CS SDI SDO SClk
MCLK_n
STS1_n
DS3/E3_n
RRCLK_n
RRPOS_n
RRNEG_n
FL_n
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com