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
3.2x2.5mm chip type quartz crystal

OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS
PARAMETERS

SYMBOL

CONDITION MINIMUM TYPICAL MAXIMUM UNITS
Frequency Range Fo - 13 - 54 MHz
Frequency Tolerance F/Fo @ 25C 10 - 30 ppm
Temperature Stability Tc REFTO25C 10 - 30 ppm(C)
Operating Temperature TORP - -20 - +70 C
Storage Temperature TSTG - -40 - +85 C
Shunt Capacitance Co - - - 3 pF
Load Capacitance CL - 8 - 30 pF
Insulation Resistance IR - 500 - - M
Drive Level DL 100VDC 10 100 300 W
Aging Fa @25C per year -2.0 - +2.0 Ppm
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

drawing of 4 pad quartz crystal 278 series
PART NUMBER GUIDE
Example: 278-25.0M-20-W-TR
Series
Number
Frequency Load Capacitance Tolerance @ +25C Frequency Stability Over Temp ( C ) Operating 
Temp ( C )
Packaging**
278 25.0M 09 15 K S TR
Oscilent
3.2 x 2.5 SMD

Enter desired frequency.

Enter desired capacitance here.
Blank * =  ±30 PPM
10 = ±10 PPM
15 = ±15 PPM
20 = ±20 PPM
25 = ±25 PPM
50 = ±50 PPM
Avail. = ±10 ~ ±30
Blank* = ±50 PPM
G =  ±30 PPM
H = ±20 PPM
K = ±15 PPM
L =  ±10 PPM
N = ±5 PPM
M = ±100 PPM
Avail. = ±10 ~ ±30
P =  0~+50
R =  -10~+60
S =  -20~+70
T = -30~+80
W = -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

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