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參數(shù)資料
| 型號： | MK2049-01SI |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 44.736 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| 封裝： | 0.300 INCH, SOIC-20 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 125K |
| 代理商： | MK2049-01SI |
MK2049-01
Communications Clock PLL
MDS 2049-01 K
6
Revision 091801
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800tel www.icst.com
Loop Filter Components
CAP2
CAP1
1.5 nF
7.5 M
0.030
F
Crystal Operation
Figure 2. Loop Filter component values for most configurations
Typical component values are shown. Contact the ICS applications department at
(408)297-1201 for the recommended values for your application.
The MK2049 operates by phase locking the input signal to a VCXO which consists of the special recommended
crystal and the integrated VCXO oscillator circuit on the MK2049. To achieve the best performance and reliability, the
layout guidelines shown on the previous page must be closely followed.
The frequency of oscillation of a quartz crystal is determined by its cut and by the load capacitors connected to it. The
MK2049 has variable load capacitors on-chip which “pull”, or change the frequency of the crystal. External stray
capacitance must be kept to a minimum to ensure maximum pullability of the crystal. To achieve this, the layout should
use short traces between the MK2049 and the crystal.
For the VCXO to operate correctly, a crystal properly specified and matched to the MK2049-01 must be used. For
more information, including a list of recommended crystals, refer to application note MAN05.
The external loop filter should be connected between CAP1 and CAP2 as shown in Figure 2 below, and as close to
the chip as possible. Be sure to follow the recommendations on capacitor types described on page 6.
LAYOUT AND EXTERNAL COMPONENTS (continued)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MK2049-01SILF | 44.736 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-01SILF | 44.736 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-36SILF | 155.52 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-44SILFTR | 51.84 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-44SILF | 51.84 MHz, OTHER CLOCK GENERATOR, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MK2049-01SITR | 制造商:ICS 制造商全稱:ICS 功能描述:Communications Clock PLL |
| MK2049-01STR | 制造商:Integrated Device Technology Inc 功能描述:PLL CLOCK SYNTHESIZER SGL 20SOIC - Tape and Reel |
| MK2049-02 | 制造商:ICS 制造商全稱:ICS 功能描述:Communications Clock PLLs |
| MK2049-02S | 制造商:ICS 制造商全稱:ICS 功能描述:Communications Clock PLLs |
| MK2049-02SI | 制造商:ICS 制造商全稱:ICS 功能描述:Communications Clock PLLs |
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