Oscilent Corporation | 278 Series Quartz Crystal Page 1 of 2 SMD Quartz Crystal Series Number Package Description Last Modified 278 3.2 x 2.5 mm Chip Type SMD Quartz Crystal Mar. 24, 2014 FEATURES - 3.2 x 2..5mm Surface Mount Chip Type Quartz Crystal - Compact and Thin (0.65mm profile) - Heat and Shock Resistant - Suitable applications include telecomminucations equipment, short-range radio link modules, DVC, DSC, PDA, and PC - RoHS / Lead Free compliant OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS PARAMETERS Frequency Range SYMBOL CONDITION MINIMUM TYPICAL MAXIMUM UNITS Fo - 13 - 54 MHz @ 25ºC ±10 - ±30 ppm Frequency Tolerance F/Fo Temperature Stability Tc REFTO25ºC ±10 - ±30 ppm( ºC) Operating Temperature TORP - -20 - +70 ºC Storage Temperature TSTG - -40 - +85 ºC Shunt Capacitance Co - - - 3 pF Load Capacitance CL - 8 - 30 Insulation Resistance IR - 500 - - Drive Level DL 100VDC 10 100 300 µW Aging Fa @25ºC per year -2.0 - +2.0 Ppm pF M EQUIVALENT SERIES RESISTANCE (ESR) AND MODE OF VIBRATION (MODE) PARAMETERS MAX ESR (OHM) MODE 13.000MHZ ~ 19.999MHZ 80 Fundamental 20.000MHZ ~ 25.999MHZ 70 Fundamental 26.000MHZ ~ 54.000MHZ 50 Fundamental http://www.oscilent.com/spec_pages/SMDCrystals/quartz_crystals_278.htm 3/24/2014 Oscilent Corporation | 278 Series Quartz Crystal Page 2 of 2 PART NUMBER GUIDE Example: 278-25.0M-20-W-TR Series Number 278 Oscilent 3.2 x 2.5 SMD Frequency 25.0M Enter desired frequency. Load Capacitance Tolerance @ +25ºC 09 15 Enter desired Blank * capacitance here. = 10 = 15 = 20 = 25 = 50 = Avail. = ±30 PPM ±10 PPM ±15 PPM ±20 PPM ±25 PPM ±50 PPM ±10 ~ ±30 Frequency Stability Over Temp ( ºC ) Operating Temp ( ºC ) K Blank* = G= H= K= L= N= M= Avail. = ±50 PPM ±30 PPM ±20 PPM ±15 PPM ±10 PPM ±5 PPM ±100 PPM ±10 ~ ±30 S P= R= S= T= W= Packaging** TR 0~+50 -10~+60 -20~+70 -30~+80 -40~+85 Blank* = Bulk TR = Tape/Reel NOTE: Deviations on all parameters available. Please consult Oscilent for details. DEFINITIONS: Click on the characteristic names above for definitions of that particular characteristic. *STANDARDS: "Blank" part number selections indicate standard variables for that particular characteristic. **PACKAGING: Click on the packaging name above for tape/reel specifications Series No.: 278 Crystal Oscillators | Quartz Crystal | TCXO | VCXO | IF SAW Filter | RF SAW Filter | Ceramic Resonator Crystal Filter | Ceramic Filter | SAW Filter / SAW Devices | Site Map http://www.oscilent.com/spec_pages/SMDCrystals/quartz_crystals_278.htm 3/24/2014