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參數(shù)資料
| 型號： | MK2049-45ASILF |
| 元件分類： | 時鐘產生/分配 |
| 英文描述： | 125 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| 封裝： | 0.300 INCH, ROHS COMPLIANT, SOIC-20 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大小： | 181K |
| 代理商： | MK2049-45ASILF |
MK2049-45A
MDS 2049-45A A
1
Revision 110305
Integrated Circuit Systems, Inc.
● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
3.3 Volt Communications Clock PLL
Description
The MK2049-45A is a dual Phase-Locked Loop (PLL)
device which can provide frequency synthesis and jitter
attenuation. The first PLL is VCXO based and uses a
pullable crystal to track signal wander and attenuate
input jitter. The second PLL is a translator for frequency
multiplication. Basic configuration is determined by a
Mode/Frequency Selection Table. Loop bandwidth and
damping factor are programmable via external loop
filter component selection.
Buffer Mode accepts a 10 to 50 MHz input and will
provide a jitter attenuated output at 0.5 x ICLK, 1 x
ICLK or 2 x ICLK. In this mode the MK2049-45A is ideal
for filtering jitter from high frequency clocks.
In External Mode, ICLK accepts an 8 kHz clock and will
produce output frequencies from a table of common
communciations clock rates, CLK and CLK/2. This
allows for the generation of clocks frequency-locked to
an 8 kHz backplane clock, simplifying clock
synchronization in communications systems.
The MK2049-45A can be dynamically switched
between T1, E1, T3, E3 outputs with the same 24.576
MHz crystal.
ICS can customize these devices for many other
different frequencies. Contact your ICS representative
for more details.
Features
Packaged in 20-pin SOIC
3.3 V + 5% operation
Meets the TR62411, ETS300 011, and GR-1244
specification for MTIE, Pull-in/Hold-in Range, Phase
Transients, and Jitter Generation for Stratum 3, 4,
and 4E
Accepts multiple inputs: 8 kHz backplane clock, or 10
to 50 MHz
Locks to 8 kHz + 100 ppm (External mode)
Buffer Mode allows jitter attenuation of 10 - 50 MHz
input and x1 / x0.5 or x1 / x2 outputs
Exact internal ratios enable zero ppm error
Output rates include T1, E1, T3, E3, and OC3
submultiples
Available in Pb (lead) free package
See also the MK2049-34 and MK2049-36
Block Diagram
Charge
Pump
VCXO
X2
X1
ISET
CAP2
Feedback
Divider (N)
Reference
Divider
(used in buffer
mode only)
ICLK
Reference
Divider
Phase
Detector
VCXO
PLL
Feedback
Divider
VCO
Translator
PLL
CLK
CAP1
Output
Divider
Divide
by 2
CLK/2
8k
R
S
R
SET
C
P
C
S
Optional Crystal Load Caps
Divider Value
Look-up Table
FS3:0
4
C
L
C
L
External Pullable Crystal
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MK2049-45ASILFTR | 功能描述:時鐘發(fā)生器及支持產品 3.3 VOLT COMMUNICA. CLOCK VCXO PLL RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MK2049-45ASITR | 功能描述:IC CLK PLL COMM 3.3V 20-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:* |
| MK2049-45SI | 功能描述:IC CLK PLL COMM 3.3V 20-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:* |
| MK2049-45SILF | 功能描述:時鐘合成器/抖動清除器 3.3 VOLT COMMUNICA. CLOCK VCXO PLL 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 |
| MK2049-45SILFTR | 功能描述:時鐘合成器/抖動清除器 3.3 VOLT COMMUNICA. CLOCK VCXO PLL 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 |
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