MQ crystals

      Miniature surface-mount MQ crystals and MQ2 crystals are produced by using a ceramic substrate and fitted with a hermetically-sealed metal lid. The MQ & MQ2 crystals are competitively priced, well-suited to mass-market electronic applications and may also be produced to close tolerances making this crystal a good choice for applications requiring low mass and tight tolerances. There are two package variants,the 4 and 2 pad.But there is not too much stock of MQ2 in the market,if you need it,you should buy earlier.
      MQ & MQ2 crystals have six features:(1)the miniature size is 7.0mm x 5mm x 1.2mm height (2)gold-plated ceramic base with metal seam-welded lid (3)to minimize EMI the whole crystal may be grounded (4)tight tolerance of ±10pppm for telecommunications use (5)high shock and vibration resistance (6)ideal for PDAs, GPS, PCMCIA and hand-held equipment.
      Specifications of MQ & MQ2 crystals can be summarized as ten points:(1)Two frequency range,the first is AT-Cut Fundamental: 6.0MHz to 45.0MHz,the second is AT-Cut 3rd Overtone: 30.0MHz to 125.0MHz.(2)Calibration Tolerance at 25ºC:from±5ppm.(3)Storage Temperature: -55°~+105°C.(4)Shunt Capacitance (C0): 2pF to 4pF typical, 7pF maximum.(5)Load Capacitance (CL): Series or from 10pF to 32pF.(6)Ageing:<±3ppm per year at +25°C.(7)Drive level: 100 mW maximum.(8)Reflow Soldering: 10s maximum, 260°C twice or 180s at 230°C,once.(9)Package: Ceramic base, metal lid,Hermetic seal.(10)Packaging: 16mm EIA tape and reel 1000 pieces per reel.
      Above information is all relevant information about MQ & MQ2 crystals,if we find any new information,we will summarize for you,you can find it in www.ChinaICMart.com or www.seekic.com.