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3EQHM57-F-32.768P-C1.5 PDF预览

3EQHM57-F-32.768P-C1.5

更新时间: 2024-02-04 23:44:44
品牌 Logo 应用领域
EUROQUARTZ 振荡器石英晶振机械
页数 文件大小 规格书
2页 358K
描述
7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter

3EQHM57-F-32.768P-C1.5 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Contact ManufacturerReach Compliance Code:compliant
风险等级:5.71其他特性:TAPE AND REEL
最长下降时间:1.2 ns频率调整-机械:NO
频率稳定性:100%安装特点:SURFACE MOUNT
标称工作频率:32.768 MHz最高工作温度:85 °C
最低工作温度:-40 °C振荡器类型:CMOS
输出负载:15 pF物理尺寸:7.0mm x 5.0mm x 1.8mm
最长上升时间:1.2 ns最大供电电压:3.465 V
最小供电电压:3.135 V标称供电电压:3.3 V
表面贴装:YES最大对称度:55/45 %
Base Number Matches:1

3EQHM57-F-32.768P-C1.5 数据手册

 浏览型号3EQHM57-F-32.768P-C1.5的Datasheet PDF文件第2页 
3EQHM57 Group ‘P’ Low EMI Oscillators  
7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter  
Page 1 of 2  
Provides up to 15dB reduction in system EMI  
‘Drop-in’ replacement for standard clocks  
Choice of modulation rate and spread  
Miniature package: 7.0mm x 5.0mm x 1.8mm  
In electrical systems the principal cause of electro-  
magnetic interference (EMI) is the system clock  
oscillator. Traditional methods of 'patching-up' systems  
with too high a level of EMI is to use ferrite beads,  
filters, ground planes, metal shielding and similar costly  
methods, However, the most efficient and economic  
method to reduce EMI is to reduce it at source: replace  
the system clock ocillator with a low EMI clock oscillator.  
DESCRIPTION  
EQHM57 series low EMI oscillators can reduce system EMI by 15dB.  
The oscillators are a ‘drop-in’ replacement for standard oscillators.  
EMI reduction is achieved by the use of Spread Spectrum Technology  
whereby the mode energy is spread over a wider bandwidth. The  
modulation carrier frequency, operating in the kHz region, makes the  
process transparent to the oscillator frequency. There is a choice of  
modulation rates and spread to suit application requirements.  
Compared with conventional clock oscillators, Spread  
Spectrum (Dithered) Oscillators can reduce EMI by as  
much as 15dB. The part is a 'drop-in' replacement for a  
standard clock oscillator hence there is no requirement  
to re-design existing PCBs.  
SPREAD SPECTRUM TECHNOLOGY  
Unlike a conventional clock oscillator, in a Spread Spectrum Clock  
Oscillator the mode energy is spread over a wider bandwidth. This is  
achieved by the frequency modulation technique. The controlled  
modulation process may be applied to the 'down' side of the nominal  
frequency (known as DOWN SPREAD,) or spread equally either side  
of nominal (CENTRE SPREAD). Down Spread is preferred if over-  
clocking would cause a problem to the system.  
APPLICATIONS  
Printers, Multiple Function Printers (MPCs)  
Digital Copiers; PDAs  
Networking: LAN/WAN; Routers  
Storage Systems (CD-ROM, VCD, DVD, HDD)  
Scanners; Modems; Projectors  
Embedded Systems  
Musical Instruments  
Automotive: GPS car navigation systems  
LCD PC Monitors; LSD TVs  
ADSL; PCMCIA  
Still Digital Cameras (SDCs)  
MODULATION TYPES - EXAMPLES  
Output amplitude (dB) vs. frequency span (MHz)  
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE  
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk  

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