EURO QUARTZ 49SMD Standard and Low Profile FEATURES * * * * * * 49USMX CRYSTALS Low cost crystal for mass market applications Surface mount version of HC49-4H crystal Comprehensive stockholding of standard frequencies Customized parts readily available Industry-standard package Low-profile versions available OUTLINE & DIMENSIONS DESCRIPTION 49USMX crystals are low profile surface mount crystals that have the same footprint as standard HC49 or HC49-4H crystals. 49USMD crystals are ideal for use in low cost, mass-market applications. The crystal may also be specified with close tolerances when required. SPECIFICATION Frequency Range: Calibration Tolerance: Frequency Stability over Temp. AT-Cut: BT-Cut: Operating Temperature Range: Shunt Capacitance (C0): Load Capacitance (CL): Ageing: Drive Level: Reflow Soldering: Holder: Packaging: RoHS Status: 3.2MHz to 70MHz 30ppm at 25C standard 10ppm available 30ppm over -10 ~ +60* 100ppm over -10 ~ +60C* -10 ~ +60C to -40 ~ +85C 4pf typical, 7pF maximum Series or from 8pF to 32pF (Customer specified) 3ppm maximum in first year 1ppm per year thereafter (Ta = 25C, drive 100 W) 100mW typical, 500mW maximum 260C, 10s maximum Hermetic seal, resistance weld EIA 24mm tape and reel 1000 pieces per reel Compliant * Closer tolerances may be specified PART NUMBERING 49USMX part numbers are derived as follows: Example: 16.000MHz 49USMX/30/50/-20+70/30pF/ATF Nominal Frequency Holder Style & Height 49USMX = 4.2mm 49USMXL = 3.2mm 49USMX25 = 2.5mm ESR & OSCILLATION MODE Frequency Range (MHz) 3.2~3.4 3.5~4.0 4.1~4.9 5.0~5.9 6.0~8.9 9.0~9.9 10.0~12.9 13.0~24.0 24.1~30.0 24.0~48.0 27.0~30.0 30.0~50.0 50.1~70.0 Crystal Cut & Oscillation Mode Max. ESR (Ohms) AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. BT Fund. AT 3rd OT AT 3rd OT AT 3rd OT 300 150 120 100 80 60 50 45 40 40 150 100 80 Calibration Tolerance at 25C ppm Temperature Stability (Over Operating Temperature Range) ppm Operating Temperature Range C, lower and upper figure (May also be shown as lower figure only) Circuit Condition SR = Series Resonant Or 8pF to 32pF Operating Mode ATF = AT-Cut, Fundamental BTF = BT-Cut Fundamental AT3 = AT-Cut 3rd Overtone * If required the maximum ESR may be specified, in which case use the suffix `/R40' where for instance a maximum ESR of 40W is required. EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk www.euroquartz.co.uk