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參數(shù)資料
| 型號： | ZL30109QDG |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | DS1/E1 System Synchronizer with 19.44 MHz Output |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1 MM HEIGHT, MS-026ACD, TQFP-64 |
| 文件頁數(shù)： | 23/36頁 |
| 文件大?。?/td> | 474K |
| 代理商： | ZL30109QDG |
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ZL30109
Data Sheet
23
Zarlink Semiconductor Inc.
5.2 Master Clock
The ZL30109 can use either a clock or crystal as the master timing source. Zarlink application note ZLAN-68 lists a
number of applicable oscillators and crystals that can be used with the ZL30109.
5.2.1 Clock Oscillator
When selecting a clock oscillator, numerous parameters must be considered. This includes absolute frequency,
frequency change over temperature, phase noise, output rise and fall times, output levels and duty cycle.
The output clock should be connected directly (not AC coupled) to the OSCi input of the ZL30109, and the OSCo
output should be left open as shown in Figure 13.
Figure 13 - Clock Oscillator Circuit
5.2.2 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 14.
The accuracy of a crystal oscillator depends on the crystal tolerance as well as the load capacitance tolerance.
Typically, for a 20 MHz crystal specified with a 32 pF load capacitance, each 1 pF change in load capacitance
contributes approximately 9 ppm to the frequency deviation. Consequently, capacitor tolerances and stray
capacitances have a major effect on the accuracy of the oscillator frequency.
1
Frequency
20 MHz
2
Tolerance
as required
3
Rise & fall time
< 10 ns
4
Duty cycle
40% to 60%
Table 6 - Typical Clock Oscillator Specification
+3.3 V
20 MHz OUT
GND
0.1 μF
+3.3 V
OSCo
ZL30109
OSCi
No Connection
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ZL30109QDG1 | 制造商:Microsemi Corporation 功能描述:DS1/E1 System Synchronizer 64-Pin TQFP 制造商:Microsemi Corporation 功能描述:DS1/E1 SYS. SYNCH WITH 19.44MHZ 制造商:Microsemi Corporation 功能描述:DS1/E1 SYS SYNCHRONIZER 64TQFP - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SYNCHRONIZER DPLL 64TQFP 制造商:Microsemi Corporation 功能描述:IC SYNCHRONIZER DPLL 64TQFP |
| ZL30110 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Telecom Rate Conversion DPLL |
| ZL30110LDE | 制造商:Microsemi Corporation 功能描述: 制造商:Microsemi Corporation 功能描述:PLL FREQ SYNTHESIZER TRIPLE 32QFN - Rail/Tube |
| ZL30110LDE1 | 制造商:Microsemi Corporation 功能描述: |
| ZL30110LDF1 | 制造商:Microsemi Corporation 功能描述:PB FREE TELECOM RATE CONVERSION DPLL - Tape and Reel 制造商:Zarlink Semiconductor Inc 功能描述:PB FREE TELECOM RATE CONVERSION DPLL - Tape and Reel |
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