HC49H

The HC49H is one kind of crystals which are resistance welded,hermetically seald in an insert atmosphere with glass to metal seals securing the lead wires and holders suffixed -3L have a centre third wire which grounds the case.The common frequencies are available from stock.Please see p4 for details.

The general specifications of the HC49H can be summarized as:(1)load capacitance(Cl):10 pF to 75 pF or series;(2)driver level:500 uW max;(3)static capacitance(C0):7 pF max;(4)ageing:+/-3 ppm typical per year.And the standard frequency tolerances and stabilities are:+/-10 ppm,+/-20 ppm,+/-30 ppm,+/-50 ppm,+/-100 ppm.The operating temperature ranges divide omto six points:0 to 50°C,-30 to 80°C,-10 to 60°C,-40 to 90°C,-20 to 70°C,-55 to 105°C.And the environmental specification are:(1)shock:three shocks in each direction along three mutually perpendicular planes;(2)vibration:10 to 60 Hz 0.75 mm displacement,60 to 500 Hz,30 minutes in each of three mutually perpendicular planes.If you want to know more information about HC49H ,please download the datasheet in www.seekic.com and www.seekdatasheet.com