參數(shù)資料
型號： XRT8000ID
廠商： EXAR CORP
元件分類： XO, clock
英文描述： Clock Synchronizer/Adapter for Communications
中文描述： 2.048 MHz, OTHER CLOCK GENERATOR, PDSO18
封裝： 0.300 INCH, SOIC-18
文件頁數(shù)： 1/24頁
文件大?。?/td> 513K
代理商： XRT8000ID
September 2006
XRT8000
Clock Synchronizer/Adapter for
Communications
Rev.1.11
E
1999--2006
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017 z www.exar.com
FEATURES
D
Clock Adaptation for Most Popular
Telecommunication Frequencies
D
Wide Input Frequency Range
D
Programmable Output Frequencies
D
Less than 0.05UI Wide Band Output Jitter
D
Low Power Operation (5V and 3.3V)
D
Maximum Lock Time of 45mS
D
Cascadable
D
No External Components Needed
D
Lock Detect Indication Pin
APPLICATIONS
D
DSU’s, CSU’s and Access Equipment
D
ISDN Terminals
D
Concentrators and Multiplexers
GENERAL DESCRIPTION
The XRT8000 is a dual phase-locked loop chip that
generatestwo simultaneous, very low jitter, output clocks
for synchronization applications in wide area networking
systems. The outputs are phase locked to the input
signal. The chip has four basic modes of operation;
referredto as master (FORWARD, REVERSE)andslave
(FORWARD, REVERSE) modes (See Figure 1). In the
FORWARD modeitaccepts upto 16th harmonicofeither
1.544MHzor2.048MHzasinputreferenceandgenerates
1.2kHz and multiples of 2.4kHz, 56kHz or 64kHz. In the
REVERSEmodeaninputclockof56kHzor64kHzisused
to generate 1.544MHz or 2.048MHz output clocks. The
SLAVE (FORWARD, REVERSE) modes generate the
same output frequencies as the MASTER (FORWARD/
REVERSEMODES)exceptthattheinputfrequency(F
IN
)
is 8kHz. An optional divide by eight can be enabled at
each of the outputs.
The input and output frequency selection can be done
through a serial microprocessor interface. The XRT8000
isavailableineither18pinSOICpackageor18pinplastic
DIP.
ORDERING INFORMATION
Part No.
XRT8000IP
XRT8000ID
Package
Operating Temperature
Range
18 Lead 300 Mil PDIP
18 Lead 300 Mil JEDEC SOIC
-40
°
C to +85
°
C
-40
°
C to +85
°
C
n x 1.544{T1}
n x 2.048{E1}
1 <= n <= 16
K x 56kHz
K x 64kHz
1.2kHz
2.4 x K
to
43.2kHz
1 <= K <= 32
MASTER FORWARD
T1 (1.544)
or
E1 (2.048)
56kHz
64kHz
MASTER REVERSE
8kHz
B
A/ B
A
Figure 1. System Diagram
1 <= K <= 18
XRT8000
XRT8000
XRT8000
F
IN
F
IN
F
IN
CLK2
CLK2
CLK2
CLK1
CLK1
CLK1
SYNC 8kHz
SLAVE
FORWARD/REVERSE
SYNC
SYNC
相關(guān)PDF資料
PDF描述
XRT8000 Clock Synchronizer/Adapter for Communications(用于通訊的時鐘同步設(shè)備/調(diào)整器)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR-T8000ID 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Miscellaneous Clock Generator
XRT8000ID-F 功能描述:時鐘合成器/抖動清除器 3.3V-5V 0.05UI temp -45 to 85C RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT8000IDTR-F 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
XRT8000IP 制造商:EXAR 制造商全稱:EXAR 功能描述:Clock Synchronizer/Adapter for Communications
XRT8000IP-F 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
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