XRT71D00_01 Datasheet, PDF (1/26 Pages) Exar Corporation – E3/DS3/STS-1 JITTER ATTENUATOR

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XRT71D00
SEPTEMBER 2001
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
• Meets E3/DS3/STS-1 jitter transfer requirements
• No external components required
• Compliant with the jitter transfer characteristic
requirements specified in ITU G.751, G.752, and
G.755 for E3 applications
FIGURE 1. BLOCK DIAGRAM OF THE XRT71D00
E3/DS3/STS-1 JITTER ATTENUATOR
REV. 1.2.0
• Meets jitter transfer characteristic requirement as
specified by ETSI TBR24 (for E3 applications).
• Meets the Output Jitter and Wander specifications
described in ANSI T1.105.03b, Bellcore GR-253-
CORE and Bellcore GR-499-CORE standards.
• Selectable buffer size of 16 and 32 bits
• Jitter attenuator can be disabled
• Available in a 32 pin TQFP package.
• Single 3.3V or 5.0V supply.
• Operates over - 40⁰ C to 85⁰ C temperature range.
APPLICATIONS
• E3/DS3 Access Equipment.
• DSLAMs
BWS
ICT
DJA
RClk
ClkES
RPOS
RNEG
Timing Control Block /
Phase locked Loop
Write Clock
Read Clock
16/32 Bit FIFO
MClk
RRClk
RRPOS
RRNEG
FL
HOST/HW
Reset
E3/DS3
Microprocessor Serial
Interface
CS SDI SDO SClk
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com