Datasheet > 3EQHM8-ET-32.768R-D3.0

3EQHM8-ET-32.768R-D3.0

更新时间： 2024-11-07 07:12:15

品牌	Logo	应用领域
EUROQUARTZ		机械振荡器
页数	文件大小	规格书
2页	367K
描述
CMOS Output Clock Oscillator, 32.768MHz Nom, ROHS COMPLIANT, MINIATURE, DIP-8/4

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3EQHM8-ET-32.768R-D3.0 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Contact Manufacturer	Reach Compliance Code：	compliant
风险等级：	5.84	其他特性：	TRISTATE; ENABLE/DISABLE FUNCTION
最长下降时间：	4 ns	频率调整-机械：	NO
频率稳定性：	50%	安装特点：	THROUGH HOLE 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：	12.8mm x 12.8mm x 5.08mm
最长上升时间：	4 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：	NO	最大对称度：	55/45 %

3EQHM8-ET-32.768R-D3.0 数据手册

浏览型号3EQHM8-ET-32.768R-D3.0的Datasheet PDF文件第2页

EQHM8 Group ‘R’ Low EMI Oscillators

8 pin Dual-in-Line Spread Spectrum Clock Ocillator

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: 5.0 mm x 3.2 mm x 1.2mm

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

EQHM8 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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