SMALL SMD HIGH - FREQUENCY CRYSTAL UNIT MA-306 • High-density mounting-type SMD. • Excellent reliability and environment capability. • Capable of covering a wide frequency range. ( from 17.734 MHz to 41 MHz) • 2.54mm thickness is equal to SMD-type IC. Actual size Specifications (characteristics) Symbol Specifications Remarks f 17.734 MHz to 41.000 MHz Fundamental mode TSTG -55˚C to +100˚C Stored as bare product after unpacking Operating temperature TOPR -20˚C to +70˚C Maximum drive level GL 2mW max. Recommended drive level DL 10µW to 100µW Item Nominal frequency Storage temperature Temperature range Drive level Soldering condition TSOL Frequency tolerance (standard) ∆ f/f Only crystal oscillation is guaranteed Twice at under 260˚C within 10 sec. or under 230˚C within 3 min. Frequency temperature characteristics (standard) ±50ppm Ta=25˚C±3˚C ±30ppm -20˚C to +70˚C Load capacitance CL 10pF to ∞ Please specify Series resistance R1 60 Ω max. -20˚C to +70˚C, DL=100µW Shunt capacitance C0 5pF max. Insulation resistance IR 500 MΩ min. Aging fa ±5ppm/Y max. S.R. ±10ppm max. Ta=25˚C±3˚C, first year Three drops on a hard board from 75 cm or excitation Shock resistance test with 3000G x 0.3ms x 1/2 sine wave x 3 directions There are some cases that a parts of the cylindrical capsule of quartz unit expose on the surface of the molding material. External dimensions (Unit: mm) #3 #1 #2 1.3 4.2 1.3 1.9 3.2 20.000M E 572 #4 3.8 max. #3 #1 (Unit: mm) Internal connection 8.0 max. #4 Recommended soldering pattern 1.9 2.38 2.54 max. 1.3 #2 0.5 1.9 5.5 (0.9) (0.9) Do not connect #2 and #3 to external device. http://www.spezial.cz - - - [email protected] - - - Hotlines: Tel (02) 2434 2200 - - - Fax (02) 2434 3200