AT-CUT CRYSTAL UNIT (SMD * Metal-can Type) HCM49 RoHS Compliant Optional 1000pcs/reel FEATURES 7Surface mount type of metal-can HC-49/U-S. High performance with the resistance weld sealing. 7Automatic mounting and reflowable Type. 7Suitable for various applications such as communication devices, AV devices, automotive devices and measuring instruments. Life-size DIMENSION [mm] SOLDER PAD LAYOUT [mm] 12.40.4 10.5 Max. 1.5 3.81 Max. 0.8 0.1 -0.2 11.40.2 4.32 3.6 Max. 4.3 Max. 0.15 -0.05 0.64 Internal connection 5.5 3.0 5.5 4.83 Max. STANDARD SPECIFICATIONS Model Item Nominal Frequency Conditions HCM49 3.5MHz30.0MHzFundamental f0 30.0MHz50.0MHz3rd Overtone Need to contact us for the available frequency Frequency Tolerance f/f0 Frequency Tolerance over Operating Temperature Range f/f0 Operating Temperature Range TOPR -4085 Storage Temperature Range TSTR -55125 Motional (series) resistance R1 Refer to the following table at 25C Load capacitance CL 16.0pF, 18.0pF Need to specify your requirement Shunt capacitance C0 7.0pF Max. Level of drive DL 100W Max. Insulation Resistance IR 500MMin. DC100V15V f/f0 5ppm Max. 253 Aging (first year) 30ppm at 25C below 6.0MHz50ppm -1060 above 6.0MHz30ppm See figure 3 in P4 MOTIONAL (SERIES) RESISTANCE (R1) Frequency Range Mode R1 3.5MHzf04.0MHz 4.0MHzf06.0MHz 6.0MHzf010MHz 10MHzf014MHz 14MHzf030MHz 30MHzf036MHz 36MHzf050MHz Fundamental Fundamental Fundamental Fundamental Fundamental 3rd Overtone 3rd Overtone 200Max. 150Max. 100Max. 80Max. 50Max. 140Max. 100Max. http://www.citizen.co.jp/crystal/index.html 20 MHz CRYSTAL Part Numbering System Example Part Number: CM309S 25.000M A B J -UT Product Family Frequency Packaging method For example: Numerical Value, maximum characters as follows: -UT RoHS Compliant Tape & Reel CSA310 CSA309 CMR309T CMR310T HC49US HCM49 CM309S CS20 CS10 CS325 CS325H -UB RoHS Compliant Bulk XX.XXXXXX followed by "M" for MHz Load Capacitance A E F G H I J K Series L 12.0pF M 12.5pF N 13.0pF O 15.0pF P 16.0pF Q 18.0pF (Std) R 20.0pF S 22.0pF 25.0pF 30.0pF 32.0pF 33.0pF 10.0pF 50.0pF 11.0pF T U V 14.0pF 17.0pF 8.0pF ...others to be assigned Frequency Stability [over Listed Temp.] A B C D E F G H I J Frequency Tolerance [at 25C] A B C D E F G H 30ppm 50ppm 100ppm 20ppm 10ppm 15ppm 25ppm 5ppm (Standard) * * * (CS325H) * * * *Consult Citizen 30ppm 50ppm 100ppm 20ppm 10ppm 30ppm 50ppm 100ppm 20ppm 10ppm (-10 to +60C) (-10 to +60C) (-10 to +60C) (-10 to +60C) (-10 to +60C) (-40 to +85C) (-40 to +85C) (-40 to +85C) (-40 to +85C) (-40 to +85C) * (Standard) * * (CS325H) * * * * * K L M N O P Q R S T 150ppm 200ppm 60ppm 80ppm 30ppm 40ppm 50ppm 60ppm 70ppm 80ppm (-40 to +85C) (-40 to +85C) (-40 to +85C) (-40 to +85C) (-20 to +70C) (-20 to +70C) (-20 to +70C) (-20 to +70C) (-20 to +70C) (-20 to +70C) * * * * * * * * * *