1.8mm Spread Spectrum Clock Ocillator Provides 15dB reduction sys

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1.8mm Spread Spectrum Clock Ocillator Provides 15dB reduction sys

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3EQHM57 Group Oscillators
1.8mm Spread Spectrum Clock Ocillator
Provides 15dB reduction system `Drop-in' replacement standard clocks Choice modulation rate spread Miniature package: 1.8mm
electrical systems principal cause electromagnetic interference (EMI) system clock oscillator. Traditional methods 'patching-up' systems with high level ferrite beads, filters, ground planes, metal shielding similar costly methods, However, most efficient economic method reduce reduce source: replace system clock ocillator with clock oscillator. Compared with conventional clock oscillators, Spread Spectrum (Dithered) Oscillators reduce much 15dB. part 'drop-in' replacement standard clock oscillator hence there requirement re-design existing PCBs.
DESCRIPTION EQHM57 series oscillators reduce system 15dB. oscillators `drop-in' replacement standard oscillators. reduction achieved Spread Spectrum Technology whereby mode energy spread over wider bandwidth. modulation carrier frequency, operating region, makes process transparent oscillator frequency. There choice modulation rates spread suit application requirements.
SPREAD SPECTRUM TECHNOLOGY Unlike conventional clock oscillator, Spread Spectrum Clock Oscillator mode energy spread over wider bandwidth. This achieved frequency modulation technique. controlled modulation process applied 'down' side nominal frequency (known DOWN SPREAD,) spread equally either side nominal (CENTRE SPREAD). Down Spread preferred overclocking would cause problem 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: navigation systems Monitors; ADSL; PCMCIA Still Digital Cameras (SDCs)
MODULATION TYPES EXAMPLES Output amplitude (dB) frequency span (MHz)
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset TA18 Tel: (0)1460 230000 Fax: (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk
3EQHM57 Group Oscillators
1.8mm Spread Spectrum Clock Ocillator
Page
SPECIFICATION Model Frequency Range: Spread Types: Reduction*: 3EQHM57 (Group `R') 3.5MHz 165.0MHz table below -7dBc min. 100MHz C0.25** -9dBc min. 100MHz C0.5** -15dBc min. 100MHz C1.5** With reference level modulation. 6.9kHz min, 55.5kHz max. Frequency dependent Call details CMOS +3.3VDC ±25ppm (Spec. code `A') ±50ppm (Spec. code `B') ±100ppm (Spec. code `C') ±25ppm (Spec. code `D') ±50ppm (Spec. code `E') ±100ppm (Spec. code `F') 2.0V min., 3.2V typ. (90%Vdd) 0.8V max., 0.2V typ. (10%Vdd) max, (frequency dependant) 15pF typical, max. -65° +150°C 10mA typical 18mA typical 50%±5% (CL=15pF, 50%Vdd) ±250ps typ. ±300ps max. Ohms typical >2000V (per 833) ±5ppm /year Ta=25°C 16mm tape reel, per. Output Enable/Disable. Output high impedance when taken Output enable time 100ms max.
OUTLINE DIMENSIONS
Modulation Carrier Frequency:
Output Logic: Input Voltage: Frequency Stability*** Commercial (0~70°C):
Industrial (-40~+85°C):
Output Voltage HIGH `1': Output Voltage `0': Rise/fall Times: Load: Start-up Time: Storage Temperature: Current Consumption: 50MHz: 125MHz: Duty Cycle: Cyle Cycle Jitter: Output Impedance: Static Discharge Voltage: Ageing: Packaging: Option:
ENVIRONMENTAL SPECIFICATION RoHS Compliance: Storage Temperature Range: Humidity: Hermetic Seal: Solderability: Reflow: Vibration: Shock: RoHS compliant (lead) free -55° +125°C 85°C hours Leak Rate 2x10-8 ATM-cm3/s max. MIL-STD-2002F method 208E 260° seconds MIL-STD-202F method 204, 50Hz 2000Hz MIL-STD-202F method 213B, test condition: 1000g sine wave
Notes: reduction applied entire frequency spectrum dBc: with respect modulation. Frequency total spread dependant. Frequency Stability parameter excludes modulation.
AVAILABILITY SPREAD TYPES MODULATION RATES PART NUMBER CONFIGURATION Tristate Series designation SPREAD TYPES MODULATION DOWN SPREAD Group D1.0 D3.0
3EQHM57-BT-32.768R-C0.5
Frequency (MHz) Frequency Stability Code `F'. specification above
CENTRE SPREAD C0.5 C1.5 ±0.5% ±1.5%
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset TA18 Tel: (0)1460 230000 Fax: (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk

1.8mm Spread Spectrum Clock Ocillator Provides 15dB reduction sys

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