49USMX CRYSTALS

      The 49USMX crystals are low profile surface mount crystals which have the same  footprint  as  standard HC49  or HC49-4H  crystals.  49USMD crystals are excellent for use in low cost, mass-market applications but are also able to be produced to close tolerances when required. The 49USMX crystals have many features, such as 1.   Low cost crystal for mass market applications; 2. Surface mount version of HC49-4H crystal; 3. Comprehensie stockholding of standard frequencies; 4. Customized parts readily available; 5.Industry-standard package; 6. Low-profile versions available.
      SPECIFICATION of the 49USMX crystals: 1.Frequency Range is from 3.2MHz to 70MHz; 2.Calibration 3. Tolerance: ±30ppm at 25°C standard ±10ppm available; 4.Frequency Stability over Temp.AT-Cut: ±30ppm over -10° ~ +60°, BT-Cut:  ±100ppm over -10° ~ +60°C; 5.Operating Temperature Range: -10° ~ +60°C to -40° ~ +85°C; 6.Shunt Capacitance (C0):4pf typical, 7pF maximum; 7.Load Capacitance (CL):  Series or from 8pF to 32pF (Customer specified); 8.Ageing: ±3ppm maximum in first year ±1ppm per year thereafter (Ta = 25°C, drive 100mW); 9.Drive Level: 100mW typical, 500mW maximum; 10.Reflow Soldering:  260°C, 10s maximum; 11.Holder:    Hermetic seal, resistance weld; 12.Packaging: EIA 24mm tape and reel, 1000 pieces per reel; 13.RoHS Status: Compliant.