EURO QUARTZ HC51 and HC48 Crystals 18.4 x 9.3 x 19.7mm Leaded Crystal 100.0kHz to 70.0MHz Low frequencies with minimal ESR Clost tolerances available Customizable specification Industry-standard package DESCRIPTION OUTLINE & DIMENSIONS HC51 crystals are long-established standard crystals in the industry. Basic HC51 crystals supply low frequencies with low ESR at low cost. HC48 crystals are a package variant with larger diameter leads for socket mounting. SPECIFICATION Frequency Range: 100.0kHz to 70.0MHz (See table for crystal cut and ESR) From 10ppm to 100ppm From 10ppm to 100ppm (See table) From 8pF to 50pF or Series 1mW maximum 9pF maximum 3ppm maximum in first year 1ppm thereafter RoHS Compliant* Calibration Tolerance: Frequency Stability over Temp: Load Capacitance: Drive Level: Static Capacitance (C0): Ageing: RoHS Status: Holder Types HC51: Two lead standard HC48: 1.27mm leads for socket use * If required, non-RoHS Compliant parts may be specified. Check with Euroquartz technical sales. ESR & OSCILLATION MODE Frequency Range 100.0kHz ~ 890kHz 890kHz ~ 1.8432MHz 1.8432 ~2.5MHz 2.5 ~ 3.5MHz 3.5 ~ 7.0MHz 7.0 ~ 12.0MHz 12.0 ~ 24.0MHz 9.0 ~ 30.0MHz 15.0 ~ 70.0MHz PART NUMBER FORMAT Crystal Cut Oscillation Mode ESR Max. SL-Fundamental AT-Fundamental AT-Fundamental AT-Fundamental AT-Fundamental AT-Fundamental AT-Fundamental AT-3rd Overtone AT-5th Overtone 3000 800 350 200 100 40 20 20 20 Example: 1.8432MHz HC51/50/50/-10+60/30pF Nominal Frequency Package HC51 or HC48 Calibration tolerance at 25C (ppm) Temp. stability over temp. range (ppm) Operating Temp. Range (- and +C) Load Capacitance (CL) in pF or SR = Series STABILITY OVER TEMPERATURE RANGE (AT-CUT CRYSTALS) Temp. Range C 0~+50 -10~+60 -20~+70 -30~+80 -40~+85 -55~+125 Stability ppm 7.5 10 15 20 30 50 100 u u X X X X u u u X X X u u u X X X u u u u X X u u u u u X u u u u u u u u u u u u (u= Available, X = Not available) EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk