SMALL SMD LOW / MEDIUM-FREQUENCY CRYSTAL UNIT MC-306 • • • • High-density mounting-type SMD. Photolithography finished allows uniform and stable performance. Excellent reliability and environmental capability. 2.54mm thickness is equal to SMD-type IC. Actual size Specifications (characteristics) Item Symbol f Nominal frequency Storage temperature Operating temperature Temperature range 32.768 kHz 20.000 kHz to 165.000 kHz TSTG -55˚C to +125˚C TOPR -40˚C to +85˚C Stored as bare product after unpacking 1.0µW max. GL Maximum drive level Remarks Specifications Twice at under 260˚C within 10 sec. Soldering condition TSOL Frequency tolerance (standard) ∆f/f Peak temperature (frequency) θT 25˚C ±5˚C Temperature coefficient (frequency) a -0.04ppm/ ˚C2 max. Load capacitance CL or under 230˚C within 3 min. ±20ppm, ±50ppm 6pF to ∞ Please specify Series resistance R1 Motional capacitance C1 1.8fF typ. 4.0fF to 0.6fF Shunt capacitance C0 0.9pF typ. 2.0pF to 0.6pF Insulation resistance IR Aging fa Shock resistance Ta=25˚C, DL=0.1µW ±50ppm, ±100ppm 50 kΩ max. 55 kΩ to 10 kΩ As per below table 500 MΩ min. ±3ppm/Y max. ±5ppm/Y max. Ta=25˚C ±3˚C, first year Three drops on a hard board from 75 cm or excitation ±5ppm max. S.R. 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. Series resistance Frequency (kHz) 20 ≤ f < 30 30 ≤ f < 40 40 ≤ f < 60 60 ≤ f < 70 70 ≤ f < 120 120 ≤ f < 165 Series resonance resistance (Ω) 55K Ω max. 45K Ω max. 20K Ω max. 15K Ω max. 12K Ω max. 10K Ω max. External dimensions (Unit: mm) #3 #1 #2 1.3 4.2 1.3 1.9 3.2 32.768k E 571 #4 3.8 max. #3 #2 1.9 2.38 2.54 max. 1.3 #1 (Unit: mm) Internal connection 8.0 max. #4 Recommended soldering pattern 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