THROUGH-HOLE CRYSTALS HC51 SERIES CRYSTALS DESCRIPTION OUTLINES & DIMENSIONS HC51 crystals are long-established standard crystals in the industry. Basic specification HC51 crystals provide low frequencies at relatively low cost and have the advantage of low ESR values. A holder variant is the HC48 which has larger diameter leads specifically for socket mounting. FEATURES · · · · · Low frequencies with low ESR values. Available with close tolerances Fully customisable specification Industry-standard package with options Wide frequency range GENERAL SPECIFICATION Frequency Range: Calibration Tolerance at 25ºC: Frequency stability over temp: Load Capacitance: Ageing: Drive level: Static capacitance (C0): Holder: 100kHz to 70MHz from ±10ppm to ±100ppm from ±10ppm to ±100ppm 8pF to 50pF, or Series ±3ppm max 1st year, ±1ppm max per year after 1mW max 9pF max Resistance-weld, hermetic seal Part Numbers for Holder Variants * FREQUENCY STABILITY OVER TEMPERATURE Operating Temp. °C Temperature Stability (ppm) ±3 ±5 ±7.5 ±10 ±15 ±20 ±30 0° to +50° X X ü ü ü ü ü -10° to +60° X X X X ü ü ü -20° to +70° X X X X X ü ü OSCILLATION MODE & ESR -30° to +80° X X X X X ü ü Frequency (MHz) -40° to +90° X X X X X X ü -55° to +105° X X X X X X ü Holder Type Standard 2 lead: ‘Plug-in’ for use in socket: 100kHz~890kHz 890kHz~1.8432 1.8432~2.5 2.5~3.5 3.5~7.0 7.0~12.0 12.0~24.0 9.0~ 30.0 15.0~70.0 Holder Designation HC51 HC48 Crystal Cut/ ESR (max) Oscillation Mode (Ohms) SL Fund. AT Fund. AT Fund. AT Fund. AT Fund AT Fund. AT Fund. AT 3rd OT AT 5th OT 3000 800 350 200 100 40 20 20 20 ü Indicates this stability is available over the stated operating temp. range CUSTOM PRODUCTION Euroquartz maintain stocks of certain frequency and specificationHC51 and HC48 crystals. Custom parts are manufactured to order on short lead times. Contact Euroquartz technical sales with your requirement. PART NUMBER GENERATION HC51 crystal part numbers are derived as follows: Example: 1.000MHz HC51/50/100/10/30pF/ATF Frequency Holder (HC51 or HC48) Calibration Tolerance (±ppm) Temperature Stability (±ppm) Temperature Range (±ppm) Circuit Condition Crystal Cut and Mode EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 1460 230000 Fax: +44 1460 230001 email: [email protected] web: www.euroquartz.co.uk