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參數(shù)資料
| 型號： | MK2049-02 |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 51.84 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| 封裝： | 0.300 INCH, SOIC-20 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 87K |
| 代理商： | MK2049-02 |
MK2049-02
Communications Clock PLL
MDS2049-02
5
Revision 7309
Printed 7/30/99
MicroClock Division of ICS 525 Race Street San Jose CA 95126 (408)295-9800tel(408)295-9818fax
ICRO
CLOCK
ADVANCE
ADVANCE INFORMATION
INFORMATION
External Components/Crystal Selection
The MK2049-02 requires a minimum number of external components for proper operation. A decoupling
capacitor of 0.01F must be connected between VDD and GND pins close to the chip (especially pins 4
and 7, 15 and 17), and 33
terminating resistors can be used on clock outputs with traces longer than 1
inch (assuming 50
traces). The external loop filter should be connected between CAP1 and CAP2 as
shown below, and as close to the chip as possible. High quality ceramic capacitors are recommended, but
leave provisions for sizes up to 10F. See also the section titled “Loop Bandwidth and Loop Filter
Component Selection” on page 9 for more details on these components.
Parameter
Minimum
Typical
Maximum
Units
Operating Temperature Range
0
25
70
C
Nominal Frequency
As stated in the tables on Page 3
MHz
Initial Accuracy at 25 C
-20
20
ppm
Temperature stability
-30
30
ppm
Aging, first year
-5
5
ppm
Aging, 10 years
-20
20
ppm
Load Capacitance
14
pF
Shunt Capacitance, C0
7
pF
Motional Capacitance, C1
none
pF
C0/C1 ratio for 12.288 MHz - 12.96 MHz*
250
none
Crystal Specifications
*This ratio decreases for lower crystal frequencies.
External crystal capacitors may be needed to tune the crystal frequency; leave pads for these capacitors on
the layout. The crystal should be a fundamental, parallel mode, AT cut pullable crystal with 14 pF load
capacitance. Refer to the table below for additional specifications on the crystal.
CAP2
CAP1
Crystal Part Numbers from Ecliptek (http://www.ecliptek.com)
Frequency
Ecliptek P/N
8.192
ECX-5225-8.192M
10.24
ECX-5226-10.24M
11.184
ECX-4901-11.184M
11.456
ECX-4902-11.456M
12.288
ECX-4735-12.288M
12.352
ECX-4904-12.352M
12.96
ECX-4903-12.96M
相關PDF資料 |
PDF描述 |
|---|---|
| MK2049-35SI | 49.152 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-44SI | 51.84 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-45ASITR | 125 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-45SITR | 125 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| MK2049-45SILFTR | 125 MHz, OTHER CLOCK GENERATOR, PDSO20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| MK2049-02SITR | 制造商:ICS 制造商全稱:ICS 功能描述:Communications Clock PLLs |
| MK2049-02STR | 制造商:ICS 制造商全稱:ICS 功能描述:Communications Clock PLLs |
| MK2049-03S | 制造商:MICROCLOCK 功能描述: |
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