3HM57 Group R A DROP-IN REPLACEMENT SOLUTION FOR YOUR EMI / EMC COMPLIANCE PROBLEM The principle sources of the EMI problem come from the system clocks. Therefore, rather than patch the problem with ferrite beads, EMI filters, ground plane and metal shielding, the most efficient and economic way to reduce the peak radiation energy is to use the low EMI clock oscillator. Compared with the conventional clock oscillators, Mercury HM57 series spread spectrum (dithered) clock oscillators can reduce EMI as much as 12 dB. The beauty is it is a drop-in replacement for your existing 5x7 clock oscillator. No need to re-spin the board. 3HM57 reduces your EMI and shorten your time to market. Applications Printers Multiple function printers (MPCs) Embedded systems Electrical musical instrument Digital copiers PDAs Automotive GPS car navigation systems Networking LAN / WAN Routers LCD PC monitors / LCD TVs Storage systems (CD-ROM, VCD, DVD and HDD) ADSL PCMCIA Scanner Modems projectors Still Digital cameras (SDCs) Hand-held ID readers Modulation Types Output amplitude (dB) vs frequency span (MHz) Spread Spectrum Clock (SSC): Down spread D. D1 as an example Center spread C. C0.5 as an example Unlike the conventional clock, the mode energy of a spread spectrum clock is spread over a wider Conventional Conventional bandwidth, resulting from the Clock Clock dB frequency modulation technique. The EMI reduction EMI reduction modulation carrier frequency is in the Spread KHz range which makes the spectrum clock modulation process transparent to the oscillator frequency. The controlled modulation process can be on all of one side of the nominal frequency (down spread) or 50% up and 50% down (center spread). The down spread is preferred if over-clocking is Frequency fo=fc a problem to the system. fc fo - (fo*0.5%) fo + (fo*0.5%) fo - (fo*1%) MERCURY www.mercury-crystal.com Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: sales-tw mercury-crystal.com U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: sales-us mercury-crystal.com Page 1 of 5 April. 19. 2005 Rev. G R0.2 General Specifications: at Ta=+25C, C =15 pF L Mercury Model 3HM57 Group R Frequency Range 5.0 ~160.0 MHz 7.000.15 Spread Type Total % Down Spread (D) Center Spread (C) Spread Percentage 1% -1% (D1) 0.5 (C0.5) (Part number suffix) 3% -3% (D3) 1.5 (C1.5) (tolerance : 2% of the total % EMI Reduction -9 dBc min. 100 MHz at C0.5 (Reduction is applied to the -15 dBc min. 100 MHz at C1.5 entire spectrum) With respect to the dB level when no modulation. 0.6 1.4 Modulation Carrier Frequency 6.9 KHz min. 55.5 KHz max. (Dither rate) Frequency dependent. Call for details. Output Logic CMOS Square Wave Input Voltage (V ) V = +3.3 V D.C. 5% DD DD Commercial (0C to +70C): Frequency Stability A: 25 ppm B: 50 ppm C:100 ppm (exclude modulation) Industrial (-40C to +85C): 5.08 0.200 D: 25 ppm E: 50 ppm F:100 ppm Output Voltage High 1 2.0 V min. 3.2 V typical (at 90% V ) DD Output Voltage Low 0 0.8 V max. 0.2 V typical (at 10% V ) DD Rise Time / Fall Time 4 n sec. max. (10% V 90% V ) DD DD Suggested Land Pattern Load 15 pF Start-up Time 2 ms typical 5 ms max. 2.2 0.086 Stabilization Time 2 ms max. 10.0 MHz: 7 mA 32.768 MHz: 8 mA Current Consumption 75.0 MHz: 17 mA 125 MHz: 18 mA Duty Cycle 50%5%. ( C =15 pF at 50% V ) L DD Cycle-to-cycle Jitter 250 ps typical 300 ps max. Output Impedance 40 ohms typical Static Discharge Voltage >2000 V (per MIL-STD-883, method 3015) 5.08 0.200 Storage Temperature -65C to +150C Aging 5 ppm per year max. Ta=+25C Pad Connections Packaging 16 mm tape and reel. 1000 pcs per reel 1 Tri-State 3 SSC Output Output is high impedance when taken low. 2 Ground 4 +3.3 V D.C. Pin 1 Function Output enable /disable time: 100 ns max. Environmental Performance Specifications Green Requirement RoHS Compliant and Pb (lead) free Storage temp. range -55 to +125C Humidity 85% RH, 85C, 48 hours -8 3 Hermetic seal Leak rate 2x10 ATM-cm /sec max. Solderability MIL-STD-202F method 208E Reflow 260C for 10 sec. Vibration MIL-STD-202F method 204, 35G, 50 to 2000 Hz Shock MIL-STD-202F method 213B, test condition. E, 1000GG sine wave Page 2 of 5 Apr. 19, 2005 Rev. G R0.7 2.0 0.079 5.000.15 1.25 0.1 1.8 0.071