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: 1.0mhz to 250.0mhz calibration tolerance at 25oc: from 3ppm to 50ppm frequency stability over temp: from 3ppm to 100ppm load capacitance: 8pf to 50pf, or series ageing: 3ppm max 1st year, 1ppm max per year after drive level: 1mw max static capacitance (c0): 7pf max holder: resistance-weld, hermetic seal part numbers for holder variants * holder type holder designation standard 2 lead: hc49 low height versions: hc49/t (from 4.0mhz) centre earth lead: hc49/3w centre earth lead (low): hc49/t/3w (from 4.0mhz) ?plug-in? for use in socket: hc-50 very low cost crystal available with close tolerances fully customisable specification comprehensive euroquartz stockholding industry-standard package with options very wide frequency range hc49 series crystals * hc49 crystals are also available for surface-mount applications with formed leads and fitted with a clip. see ?49mj? in the surface-mount crystal section on euroquartz website; www.euroquartz.co.uk features general specification description hc49 crystals are a long-established industry-standard part. basic specification hc49 crystals provide the lowest cost crystal available but these crystals can also be manufactured to very close tolerances and low esr values. holder variants are hc49/t (truncated), providing a lower height version, 3-wire versions where the crystal base and body can be earthed by a centre earth wire and hc50 which has larger diameter leads specifically for socket mounting. outlines & dimensions frequency (mhz) crystal cut/ oscillation mode esr (max) (ohms) oscillation mode & esr 1.0 ~ 1.3 sl fund. 5000 2.01 ~ 3.0 at fund. 400 3.01 ~ 3.2 at fund. 200 3.21 ~ 3.5 at fund. 150 3.51 ~ 3.9 at fund 120 3.91 ~ 5.0 at fund. 100 5.01 ~ 7.0 at fund. 50 7.01 ~ 10.0 at fund. 35 10.0 ~ 30.0 at fund. 25 30.1 ~ 45 at fund. 20 24.0 ~ 100 at 3 rd ot 40 80.0 ~ 160 at 5th ot 70 110 ~ 250 at 7th ot 120 indicates this stability is available over the stated operating temp. range part number generation hc49 crystal part numbers are derived as follows: example: 16.000mhz hc49/30/50/10/30pf/atf frequency/holder/calibration/temp. stability/ temp. range/circuit frequency stability over temperature 0 to +50 -10 to +60 -20 to +70 x -30 to +80 x x x -40 to +90 x x x x -55 to +105 x x x x x operating temp. c temperature stability (ppm) 3 5 7.5 10 15 20 30
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