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參數(shù)資料
| 型號： | MT9040AN |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | T1/E1 Synchronizer |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO48 |
| 封裝： | 0.300 INCH, MO-118AA, SSOP-48 |
| 文件頁數(shù)： | 10/27頁 |
| 文件大?。?/td> | 424K |
| 代理商： | MT9040AN |
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MT9040
Data Sheet
10
Zarlink Semiconductor Inc.
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
±
100ppm. For applications requiring an accurate Freerun Mode, such as AT&T TR62411, the tolerance of
the master timing source must be no greater than
±
32ppm.
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 MT9040 will always equal 230ppm.
For example, if the master timing source is 100ppm, then the capture range will be 130ppm.
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 5 - Clock Oscillator Circuit
For applications requiring
±
32ppm clock accuracy, the following clock oscillator module may be used.
FOX F7C-2E3-20.0MHz
Frequency:
Tolerance:
Rise & Fall Time:
Duty Cycle:
20MHz
25ppm 0C to 70C
10ns (0.33V 2.97V 15pF)
40% to 60%
CTS CB3LV-5I-20.0 MHz
Frequency:
Tolerance:
Rise & Fall Time:
Duty Cycle:
20MHz
25ppm
10ns
45% to 55%
The output clock should be connected directly (not AC coupled) to the OSCi input of the MT9040, and the OSCo
output should be left open as shown in Figure 9.
Crystal Oscillator
- Alternatively, a Crystal Oscillator may be used. A complete oscillator circuit made up of a
crystal, resistor and capacitors is shown in Figure 6.
+3.3V
20MHz OUT
GND
0.1uF
+3.3V
OSCo
MT9040
OSCi
No Connection
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MT9040AN1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Rail/Tube |
| MT9040ANR1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Tape and Reel |
| MT9041 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Multiple Output Trunk PLL |
| MT9041AP | 制造商:Microsemi Corporation 功能描述:WAN/PLL 制造商:Zarlink Semiconductor Inc 功能描述:WAN/PLL |
| MT9041B | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:T1/E1 System Synchronizer |
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