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 euro quartz 3.2 ~ 3.4 at-fund. 300 3.5 ~ 6.0 at-fund. 120 6.1 ~ 10.0 at-fund. 60 10.1~30.0 at-fund. 40 24.0~48.0 bt-fund. 40 27.0 ~ 30.0 at-3rd ot 150 30.1 ~ 50.0 at-3rd ot 100 50.1 ~ 70.0 at-3rd ot 80 description 49usmx crystals are low profile surface mount crystals with the same footprint as standard hc49 and hc49-4h crystals. 49usmx crystals are ideal for use in low cost, mass-market applications but are also able to be produced to close tolerances when required. low cost crystal for mass market applications surface mount version of hc49-4h crystal comprehensie stockholding of standard frequencies customized parts readily available industry-standard package low-profile versions available features outline & dimensions frequency range: 3.2mhz to 70mhz calibration tolerance: 30ppm at 25c standard 10ppm available frequency stability over temp: from 10ppm over -10 ~ +60 from 15ppm over -40 ~ +85c storage temperature range: -50 ~ +105c shunt capacitance (c0): 4pf typical, 7pf maximum load capacitance (cl): series or from 8pf to 32pf (customer specified) ageing: 3ppm maximum (ta = 25c, drive 100 m w) drive level: 100 m w typical, 500 m w maximum reflow soldering: 260c, 10s maximum holder: hermetic seal, resistance weld packaging: eia 24mm tape and reel 1000 pieces per reel rohs status: rohs compliant specification frequency range mhz crystal cut/ mode esr max. equivalent series resistance 49usmx crystals part number generation 12.000mhz 49usmx/30/50/-20+70/18pf/atf example: nominal frequency package (height variants): 49usmx (4.2mm) 49usmxl (3.2mm) 49usmxl25 (2.5mm) calibration tolerance at 25c (ppm) temperature stability over temp. range (ppm) operating temp. range (c) (lower and upper limits) load capacitance (either sr for series or cl in pf) crystal mode atf = at-cut fundamental btf = bt-cut fundmental at3 = at-cut 3rd overtone 49smd standard and low profile 3.2mhz to 70.0mhz
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