EURO QUARTZ 3EQHM572N Low EMI Oscillator 7 x 5 x 1.4mm SMD - Group 'N' Provides from 8dB to 15dB reduction in system EMI ‘Drop-in’ replacement for standard clocks Choice of modulation rate and spread Miniature package: 7.0 mm x 5.0 mm x 1.4mm N Group parts provide a low cost EMI reduction solution In electrical systems the principal cause of electromagnetic 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. Compared with conventional clock oscillators, Spread Spectrum (Dithered) Oscillators can reduce EMI by as much as 16dB. The part is a 'drop-in' replacement for a standard clock oscillator hence there is no requirement to re-design existing PCBs. 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) Medical devices Page 1 of 3 DESCRIPTION EQHM572 series low EMI oscillators can reduce system EMI from 8dB to 16dB. 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. 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 overclocking would cause a problem to the system. MODULATION TYPES - EXAMPLES EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk EURO QUARTZ 3EQHM572N Low EMI Oscillator 7 x 5 x 1.4mm SMD - Group 'N' 8.0MHz to 128MHz Page 2 of 3 SPECIFICATION Model No: Frequency Range: Spread Types: Spread Magnitude: 3EQHM572 (Group ‘N’) 8.0MHz to 128.0MHz Down or Centre spread See table 1 below. ( ) 8~15dB reduction typical. Fundamental and higher order harmonics. EMI Reduction: Variation of EMI reduction across Temerature: Modulation Carrier Frequency: Frequency Stability*** Commercial (0~70°C): OUTLINE & DIMENSIONS 5% max. across -40° to +85°C w.r.t. room temperature 31.25kHz min, 62.50kHz max. ±25ppm (Spec. code = ‘A’) ±50ppm (Spec. code = ‘B’) ±100ppm (Spec. code = ‘C’) Industrial (-40~+85°C): Rise/Fall Times: Start-up Time: Stabilisation (PLL Lock) Time: Ageing: Output Logic: Input Voltage: Output Voltage HIGH ‘1’: Output Voltage LOW ‘0’: Load: Current Consumption (no load) 12MHz: 24MHz: 32MHz: Duty Cycle: Cycle to Cycle Jitter: Output Impedance: Packaging: Pad 1 Function: ±25ppm (Spec. code = ‘D’) ±50ppm (Spec. code = ‘E’) ±100ppm (Spec. code = ‘F’) 5ns max, (10% to 90% Vdd) 5ms typical, 10ms max. 2ms maximum. ±5ppm/year CMOS Square Wave +3.3Volts DC±10% 2.4V min., IOH = -4mA at Spread Spectrum output 0.4V max., IOH = 4mA at Spread Spectrum output 15pF maximum 28mA 33mA 41mA 50%±10% (CL=15pF, 50%Vdd) See table 2 45 to 90Ω typical. Dependent upon output frequency spread type and spread magnitude EIA 16mm tape and reel, 1k per. No connection SSC BLOCK DIAGRAM CYCLE-TO-CYCLE JITTER Table 2 8.0MHz: 16.0MHz: 32.0MHz: 64.0MHz: 128.0MHz: 240ps 270ps 240ps 165ps 150ps typical, typical, typical, typical, typical, 450ps 400ps 380ps 380ps 380ps maximum maximum maximum maximum maximum EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk EURO QUARTZ 3EQHM572N Low EMI Oscillator 7 x 5 x 1.4mm SMD - Group 'N' 8.0MHz to 128MHz Page 3 of 3 SPREAD TYPE & MODULATION MAGNITUDE Table 1 Frequency Range (MHz) Modulation Carrier Frequency (kHz) fo Spread Type and Modulation Magnitude (%) (Spread Spectrum Part Code) Centre Spread ('C') Down Spread ('D') 8.0 ~ 9.99 ±1.4% (C1.4) ±0.6% (C0.6) '-3.0% (D3) -2.2% (D2.2) 10.0 ~ 11.99 ±1.3% (C1.3) ±0.5% (C0.5) -2.7% (D2.7) -1.9% (D1.9) 12.0 ~ 13.99 fo/256 ±1.2% (C1.2) ±0.5% (C0.5) -2.5% (D2.5) -1.8% (D1.8) 14.0 ~ 15.99 ±1.1% (C1.1) ±0.4% (C0.4) -2.3% (D2.3) -1.7% (D1.7) 16.0 ~ 19.99 ±1.4% (C1.4) ±0.6% (C0.6) '-3.0% (D3) -2.2% (D2.2) 20.0 ~ 23.99 ±1.3% (C1.3) ±0.5% (C0.5) -2.7% (D2.7) -1.9% (D1.9) 24.0 ~ 27.99 fo/512 ±1.2% (C1.2) ±0.5% (C0.5) -2.5% (D2.5) -1.8% (D1.8) 28.0 ~ 31.99 ±1.1% (C1.1) ±0.4% (C0.4) -2.3% (D2.3) -1.7% (D1.7) 32.0 ~ 39.99 ±1.4% (C1.4) ±0.6% (C0.6) '-3.0% (D3) -2.2% (D2.2) 40.0 ~ 47.99 ±1.3% (C1.3) ±0.5% (C0.5) -2.7% (D2.7) -1.9% (D1.9) 48.0 ~ 55.99 fo/256 ±1.2% (C1.2) ±0.5% (C0.5) -2.5% (D2.5) -1.8% (D1.8) 56.0 ~ 63.99 ±1.1% (C1.1) ±0.4% (C0.4) -2.3% (D2.3) -1.7% (D1.7) 64.0 ~ 79.99 ±1.4% (C1.4) ±0.6% (C0.6) '-3.0% (D3) -2.2% (D2.2) 80.0 ~ 95.99 ±1.3% (C1.3) ±0.5% (C0.5) -2.7% (D2.7) -1.9% (D1.9) ±1.2% (C1.2) ±0.5% (C0.5) -2.5% (D2.5) -1.8% (D1.8) ±1.1% (C1.1) ±0.4% (C0.4) -2.3% (D2.3) -1.7% (D1.7) 96.0 ~111.99 fo/512 112.0 ~ 128.0 ENVIRONMENTAL SPECIFICATION RoHS Compliance: Moisture Sensitivity Level: Second Level Interconnect: Humidity: Fine Leak / Gross Leak: Solderability: Reflow: Vibration: Shock: Resistance to Solvents: Temperature Cycling: ESD Rating: Pad Surface Finish: Device Mass (Weight): RoHS compliant and Pb (lead) free in accordance with EU Directive 2002/95/EC 6/6 (2002/95/EC) and WEEE (2002/96/EC) Level 1 (infinite) according to IPC/JEDEC J-STD-020D.1 e4 85% RH, 85°C for 48 hours MIL-STD-883, method 1014, condition A / MIL-STD-883, method 1014, condition C MIL-STD-2002F method 208E 260° for 10 seconds 2 times MIL-STD-202F method 204, 35G 50 to 2000Hz MIL-STD-202F method 213B, test condition: E, 1000g ½ sine wave MIL_STD-202, method 215 MIL-STD-883, method 1010 2kV minimum per JEDEC STD 22-A114-B Gold (Au) (0.3µm minimum) over Nickel (N) (1.27µm to 8.89µm) 0.14mg per unit typical PART NUMBER FORMAT AND EXAMPLE Group ‘N’ Series designation 3EQHM572-B-32.768N-C1.4 Frequency (MHz) Spread type and modulation magnitude. Use the spread spectrum characteristic part code shown in Table 1 above. Frequency Stability Code ‘A’ to ‘F’. See specification above EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk