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CRYSTAL

更新时间： 2024-11-17 23:43:35

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其他 - ETC		振荡器晶体振荡器
页数	文件大小	规格书
4页	72K
描述
Crystal Oscillators (73k)

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CRYSTAL 数据手册

AN1007

Crystal Oscillators

HIGH-PERFORMANCE PRODUCTS

Voltage Controlled and Overtone Crystal Oscillators

These reference clocks can also be obtained with

a PLL based IC devices. Some of the most popular

reference frequencies are 155.52 MHz (OC-3) and

622.08 MHz (OC-12) which can be obtained using

Semtech’s PLL based devices mentioned in Table

Crystal oscillators are used to provide reference fre-

quency clocks for applications such as SONET, Gi-

gabit Ethernet, or fiber channel. Crystal oscillator

manufacturers can design oscillators with accurate

signal waveforms of 10 ppm or better of the refer-

ence frequency. In this application note only ex-

amples of overtone and voltage controlled crystal

oscillators are provided in figures 1, 2, 3, and 4,

respectively.

Operating

Package Type

Device

Function

Voltage

16 Pin Wide

Body SOIC

3.0V to

5.5V

SK1801W SONET OC - 3 Frequency Synthesizer

SK1802W SONET OC - 12 Frequency Synthesizer

16 Pin Wide

Body SOIC

3.0V to

5.5V

Table 1

VCC

0.1

510 Ω

20pF

SK10/100EL16B

510 Ω

50 Ω

0.001 F

VEE

Figure 1: Overtone Crystal Oscillator

Revision 1/ November 27, 2001

www.semtech.com

12 3 4

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