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Specifications
Item Symbol Specifications Remarks
Nominal frequency f 32.768kHz 20.000kHz to 165.000kHz Not every frequency
available
Temperature range:
Storage temperature TSTG -55˚C to +125˚C
Operating temperature TOPR -40˚C to +85˚C
Maximum drive level GL 1.0µW MAX
Soldering condition TSOL Two times at under 260˚C within 10 sec or under 230˚C within 3 min
Frequency tolerance (standard) ∆f/f ±10ppm or ±20ppm or ±50ppm ±100ppm Ta=25˚C, DL = 1.0µW
Turnover temperature (frequency) ØT 25˚C ±5˚C 25˚C TYP
Temperature coefficient (frequency) a -0.04ppm/˚C2MAX
Load capacitance CL 3pF to ∞Please specify
Series resistance R150KΩ50KΩto 8KΩ
Motional capacitance C11.8fF 2.1fF to 0.6fF
Shunt capacitance C10.85pF TYP 1.0pF to 0.6pF
Insulation resistance IR 100MΩMIN
Aging fa ±3ppm/year MAX ±5ppm/year MAX Ta = 25˚C ±3˚C, first year
Shock resistance S.R. ±5ppm MAX Drop test of 3 times on a hard
board from 75cm height or
excitation test with 3000G x
3mS x 1/2 sine wave
x 3 directions
Low Frequency MC306 Series Features
• Frequency range 20kHz-165kHz
• Photolithography finish allows uniform and
stable performance
• Excellent shock resistance and environmental
capability
• Ex-stock availability
• Suitable for automatic insertion
• Industrial operating temperature range as
standard
Surface Mount Quartz Crystals - Seiko Epson
Dimensions (mm)
ACT Stock Numbers
32.768kHz MC306 ±20ppm CL12.5pF DG00003DZ
32.768kHz MC306 ±50ppm CL12.5pF DG00003EC
Internal Connection
