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3EQHM57-F-32.768P-C1.25

更新时间：2024-09-18 07:42:44
品牌：EUROQUARTZ
描述：7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter

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3EQHM57-F-32.768P-C1.25 概述

7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 7 ×5× 1.8毫米SMD扩频Ocillator ，低抖动 XO

3EQHM57-F-32.768P-C1.25 规格参数

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：5.71Is Samacsys：N
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-C1.25 数据手册

通过下载3EQHM57-F-32.768P-C1.25数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。

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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  
Low EMI Oscillators  
3EQHM57 Group ‘P’  
7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter  
Page 2 of 2  
OUTLINE & DIMENSIONS  
SPECIFICATION  
Model No:  
3EQHM57 (Group ‘P’)  
13.0MHz to 220MHz  
See table below  
Frequency Range:  
Spread Types:  
EMI Reduction*:  
EMI Reduction (dB) = 10log("Total%"x"SSC Frequency(MHz)"/0.12)  
Modulation Carrier Frequency:  
25.3kHz min, 58.6kHz max.  
Frequency dependent  
Call for details  
Output Logic:  
CMOS  
Input Voltage:  
Vdd = +3.3VDC ±5%  
Frequency Stability***  
Commercial (0~70°C): ±25ppm (Spec. code = ‘A’)  
±50ppm (Spec. code = ‘B’)  
±100ppm (Spec. code = ‘C’)  
Industrial (-40~+85°C):  
±25ppm (Spec. code = ‘D’)  
±50ppm (Spec. code = ‘E’)  
±100ppm (Spec. code = ‘F’)  
Output Voltage HIGH ‘1’:  
2.4V min. at 80% Vdd  
Output Voltage LOW ‘0’:  
Rise/fall Times:  
Load:  
0.4V max. at 20% Vdd  
1.2ns max, (frequency dependant)  
15pF  
Start-up Time:  
2ms typical, 5ms max.  
Current Consumption:  
Duty Cycle:  
25mA typical, freq. dependant  
50%±5% (CL=15pF, 50%Vdd)  
±100ps typ. ±150ps max.  
40 Ohms typical  
>2000V (per MIL STD 833)  
-65°C to +150°C  
±5ppm /year max at Ta=25°C  
EIA 16mm tape and reel, 1k per.  
No function available. Do not  
electrically connect pad 1.  
Cycle to Cycle Jitter:  
Output Impedance:  
Static Discharge Voltage:  
Storage Temperature:  
Ageing:  
Packaging:  
Pad 1 Option:  
ENVIRONMENTAL SPECIFICATION  
RoHS Compliance:  
Storage Temperature Range:  
Humidity:  
RoHS compliant and Pb (lead) free  
-55° to +125°C  
85% RH, 85°C for 48 hours  
Notes:  
*
**  
EMI reduction is applied to the entire frequency spectrum  
dBc: with respect to no modulation. Frequency and total %  
spread dependant.  
-8  
3
Hermetic Seal:  
Solderability:  
Reflow:  
Leak Rate 2x10 ATM-cm /s max.  
MIL-STD-2002F method 208E  
260° for 10 seconds  
***  
Frequency Stability parameter excludes modulation.  
Vibration:  
MIL-STD-202F method 204,  
35g 50Hz to 2000Hz  
Shock:  
MIL-STD-202F method 213B, test  
condition: E, 1000g ½ sine wave  
SPREAD TYPES and % MODULATION  
DOWN SPREAD CENTRE SPREAD  
PART NUMBER CONFIGURATION  
D0.5  
-0.5%  
-0.75%  
-1.25%  
-2.0%  
-2.5%  
-3.0%  
-3.5%  
-3.75%  
C0.25  
C0.375  
C0.625  
C1.0  
±0.25%  
±0.375%  
±0.625%  
±1.0%  
Group ‘P’  
Series designation  
D0.75  
D1.25  
D2.0  
3EQHM57-B-32.768P-C0.5  
D2.5  
C1.25  
C1.5  
±1.25%  
±1.5%  
Frequency (MHz)  
D3.0  
Frequency Stability Code  
‘A’ to ‘F’. See specification above  
D3.5  
C1.75  
C1.875  
±1.75%  
±1.875%  
D3.75  
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  

3EQHM57-F-32.768P-C1.25 相关器件

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3EQHM57-F-32.768P-C1.5 EUROQUARTZ 7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 获取价格
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3EQHM57-F-32.768P-C1.875 EUROQUARTZ 7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 获取价格
3EQHM57-F-32.768P-D0.5 EUROQUARTZ 7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 获取价格
3EQHM57-F-32.768P-D0.75 EUROQUARTZ 7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 获取价格
3EQHM57-F-32.768P-D1.25 EUROQUARTZ 7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 获取价格
3EQHM57-F-32.768P-D2.0 EUROQUARTZ 7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 获取价格
3EQHM57-F-32.768P-D2.5 EUROQUARTZ 7 x 5 x 1.8mm SMD Spread Spectrum Ocillator, Low Jitter 获取价格
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