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參數(shù)資料
| 型號： | MT9046 |
| 廠商： | Zarlink Semiconductor Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | T1/E1 System Synchronizer with Holdover |
| 中文描述： | T1/E1的系統(tǒng)同步的緩繳暫繳稅 |
| 文件頁數(shù)： | 18/34頁 |
| 文件大小： | 508K |
| 代理商： | MT9046 |
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MT9046
Data Sheet
18
Zarlink Semiconductor Inc.
Applications
This section contains MT9046 application specific details for clock and crystal operation, reset operation, power
supply decoupling, and control operation.
Master Clock
The MT9046 can use either a clock or crystal as the master timing source.
In Freerun Mode, the frequency tolerance at the clock outputs is identical to the frequency tolerance of the source
at the OSCi pin. For applications not requiring an accurate Freerun Mode, tolerance of the master timing source
may be
±
100 ppm. For applications requiring an accurate Freerun Mode, such as AT&T TR62411, the tolerance of
the master timing source must be no greater than
±
32 ppm.
Another consideration in determining the accuracy of the master timing source is the desired capture range. The
sum of the accuracy of the master timing source and the capture range of the MT9046 will always equal 230 ppm.
For example, if the master timing source is 100 ppm, then the capture range will be 130 ppm.
Clock Oscillator
- when selecting a Clock Oscillator, numerous parameters must be considered. This includes
absolute frequency, frequency change over temperature, output rise and fall times, output levels and duty cycle.
Figure 8 - Clock Oscillator Circuit
For applications requiring
±
32 ppm clock accuracy, the following clock oscillator module may be used.
FOX F7C-2E3-20.0 MHz
Frequency:
Tolerance:
Rise & Fall Time:
Duty Cycle:
20 MHz
25 ppm 0C to 70C
10 ns (0.33 V 2.97 V 15 pF)
40% to 60%
The output clock should be connected directly (not AC coupled) to the OSCi input of the MT9046, and the OSCo
output should be left open as shown in Figure 8.
+3.3 V
20 MHz OUT
GND
0.1 uF
+3.3 V
OSCo
MT9046
OSCi
No Connection
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| MT9046AN | 制造商:Microsemi Corporation 功能描述: |
| MT9046AN1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SYNCHRONIZER T1/E1 48SSOP 制造商:Microsemi Corporation 功能描述:IC SYNCHRONIZER T1/E1 48SSOP |
| MT9046ANR1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SYNCHRONIZER T1/E1 48SSOP 制造商:Microsemi Corporation 功能描述:IC SYNCHRONIZER T1/E1 48SSOP |
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| MT90489 | 制造商: 功能描述: 制造商:undefined 功能描述: |
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