MMCC-1 Tuning Fork Crystals Precision 32.768 kHz quartz crystals for realtime applications The majority of applications use a 32.768 kHz crystal in an oscillator circuit incorporating binary division to produce a 1 Hz output. OBSOLETE Table 1 Environmental Electrical Specifications *MMCC-1-R PARAMETERS Frequency Tolerance @ +25°C Aging Shunt Capacitance MMCC-1 Load Capacitance MMCC-1 Standard Operating Conditions Storage Temperature Equivalent Series Resistance (ESR), Max. MMCC-1 Resonance Quality Factor Turnover Temperature Parabolic Curvature Constant Drive Level VALUE 32.768 kHz ±30 ppm ±3 ppm/yr. Max. 1.60 pF, Typical 12.5 pF, Typical See Table 1 -40°C to +85°C Holder Mechanical Shock Vibration Thermal Cycle Maximum Wave Soldering Conditions Compression seal MIL-STD-202, Method 213, C MIL-STD-202, Method 201 & 204 MIL-STD-883, Method 1010, B +260°C for 10 secs. 35 Kohms Parallel 70,000 Min. +25°C to ±5°C 2 -0.034 ppm/°C , Typical 1.0 W Max. * Series resonant designated by “SR” prefix (i.e., SRMMCC-1). Use MtronPTI part number 374-005 for ±20 ppm tolerance (MMCC-1). Contact the factory for specifications not listed. MtronPTI reserves the right to make changes to the product(s) and service(s) described herein without notice. No liability is assumed as a result of their use or application. Please see www.mtronpti.com for our complete offering and detailed datasheets. Contact us for your application specific requirements: MtronPTI 1-800-762-8800. Revision: 10-28-10