euroquartz limited blacknell lane crewkerne somerset uk ta18 7he tel: +44 1460 230000 fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk through-hole crystals frequency range: 3.2mhz to 70mhz oscillation mode at-cut fundamental: 3.2mhz to 30.0mhz bt-cut fundamental: 24.0mhz to 48.0mhz at-cut third overtone: 27.0mhz to 70.0mhz calibration tolerance at 25oc at-cut: 30ppm (tolerance to 10ppm is also available) bt-cut: 30ppm frequency stability over temperature at-cut: 30ppm over -10 to +60c (tolerance 10ppm over -10 to +60c is also available) bt-cut: 100ppm over-10 to +60c load capacitance: 8pf to 32pf or series (specify) ageing: 3ppm max 1st year, 1ppm max per year after drive level: 500 m w max static capacitance (c0): 7pf maximum very low cost crystal available with 3.5mm (standard) or 2.5mm height at-cut strip crystal with hermetically sealed metal can comprehensive euroquartz stockholding ideal crystal for height-limited pcbs hc49/4h crystals features general specification description hc49/4h crystals share the same base dimensions as the industry- standard hc49 crystal but with a low profile can. the crystal utilizes an at-cut strip crystal with a hermetically sealed metal can. hc49/4h crystals provide a low-cost solution for many applications, particularly where pcb height is restricted. outlines & dimensions frequency (mhz) crystal cut/ oscillation mode esr (max) (ohms) oscillation mode & esr 3.2 ~ 3.4 at fund. 300 3.5 ~ 4.0 at fund. 150 4.1 ~ 4.9 at fund. 120 5.0 ~ 5.9 at fund. 100 6.0 ~ 8.9 at fund. 80 9.0 ~ 9.9 at fund. 60 10.0 ~ 12.9 at fund. 50 13.0 ~ 30.0 at fund. 40 24.0 ~ 40.0 bt fund. 40 40.1 ~ 48.0 bt fund. 30 30.1 ~ 50.0 at 3rd. 100 50.1 ~ 70.0 at 3rd. 80 part number generation hc49/4h crystal part numbers are derived as follows: example: 24.000mhz hc49/4h/30/50/10/30pf/atf frequency holder/calibration/temp. stability/ temp. range/circuit temperature stability sample curves for at-cut and bt-cut strip crystals
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