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扩充频率范围的表面贴装晶体ＨＣ４９ＳＤ是一种电阻焊、小尺寸的晶体。频率范围为３．２～７０ＭＨｚ。在２５℃时频率容限为上３０ｐｐｍ，频率稳定度为上５０ｐｐｍ。工作温度范围为０～７０℃；储存温度为－３５～８５℃。并联电容７ｐＦ，并行标准晶体的标准负载容量为２?
Surface Mount Crystals with Extended Frequency Range The HC49SD is a resistance-welded, small-size crystal. The frequency range is 3.2 ~ 70MHz. At 25 ℃, the frequency tolerance is 30ppm and the frequency stability is 50ppm. Operating temperature range of 0 ~ 70 ℃; storage temperature of -35 ~ 85 ℃. Shunt capacitance 7pF, parallel standard crystal standard load capacity of 2?