EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 sales@euroquartz.co.uk www.euroquartz.co.ukLow-cost, industry-standard crystal unitAT-Cut strip crystal with hermetically sealed canFrequency range 1.0MHz to 70MHz Package height options available Frequency Range:3.2MHz to 70.0MHz Oscillation ModeAT-Cut Fundamental:3.2MHz to 30.0MHz BT-Cut Fundamental:24.0MHz to 48.0MHz AT-Cut 3rd Overtone:27.0MHz to 70.0MHz Calibration Tolerance at 25ºCAT-Cut:±30ppm (tolerance to ±10ppmis available.) BT-Cut:±30ppm Frequency StabilityAT-Cut:±30ppm over -10° to +60°C(Stability to ±10ppm is available) BT-Cut:±100ppm pver -10 to +60°C Load Capacitance (CL):Series or from 8pF to 32pF Ageing at 25°C:±3ppm maximum, 1st year,±1ppm per year thereafter.Drive Level:100m Watts typ., 500m Watts max.Storage Temperature Range:-50° to +105°C Crystal Holder:Resistance-weld hermetic seal RoHS Status:Compliant Supply format:Bulk pack (Radial tape and reel is available)SPECIFICATIONDESCRIPTIONHC49-4H crystals share the same base outline as the industry-standard HC49 crystal. The crystal uses at AT-cut strip crystal with anhermetically sealed can. HC49-4H crystals provide a low cost sourceof system clock frequency.PART NUMBER GENERATIONPart numbers for HC49-4H crystals are generated as follows:8.000MHz HC49-4H/30/50/-20+70/30pF/30RExample:Frequency / holder /calibration tolerance /stability over op. temp./op. temp. range / circuit condition /ESR or operating modeESR and OSCILLATION MODE