參數(shù)資料
型號: XRT71D04IV
廠商: Exar Corporation
文件頁數(shù): 1/22頁
文件大小: 0K
描述: IC JITTER ATTENUATOR 4CH 80TQFP
標準包裝: 94
類型: *
PLL:
輸入: 時鐘
輸出: 時鐘
電路數(shù): 1
比率 - 輸入:輸出: 4:3
差分 - 輸入:輸出: 無/無
頻率 - 最大: 44.736MHz
除法器/乘法器: 無/無
電源電壓: 3.135 V ~ 5.25 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 80-LQFP
供應商設備封裝: 80-TQFP(14x14)
包裝: 托盤
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
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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)
DS3/E3_n
Microprocessor Serial
Interface
HOST
Reset
XRT71D04
n = 0, 1, 2, 3
16/32 Bit FIFO
Timing Control Block /
Phase locked Loop
Write Clock
Read Clock
RRCLK_n
RRPOS_n
RRNEG_n
FL_n
DJA_n
RClk_n
RClkES
RPOS_n
RNEG_n
FSS
MCLK_n
STS1_n
Channel 0
Channel 1
Channel 2
Channel 3
ICT
CS
SDI
SDO SClk
MODE_CTRL
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