CRYSTALS
LOW PROFILE CRYSTAL HOLDER & SMT DXT494/49SM
Useful replacement for DXT49
Where board space is paramount
Standard frequencies readily available
Resistance welded can
Surface mount version DXT49SM also available
SPECIFICATION
Frequency Range (Fo)
3.200MHZ to 66.000MHZ
Frequency Tolerance at 25°C +3°C
Temperature Stability (Ref to 25°C)
Operating Temperature Range (TOPR)
Storage Temperature Range (TSTG)
Shunt Capacitance (Co)
Load Capacitance (CL)
±50ppm (typ)
±50ppm (typ)
0°C to 70°C (AT)
-40°C to 85°C
7pF Max
±0 to 32 pF or Series Resonant
500 Megaohms Minimum at ±00Vdc
±mWatts Max
±50ppm
±±00ppm
0°C to 70°C (BT)
Insulation Resistance
Drive Level
Ageing (at 25°Cº)
±5ppmꢀyear Max
OUTLINE DRAWING
EQUIVALENT SERIES RESISTANCE (ESR)
MODE OF OPERATION (MODE)
11.05
Frequency Range
Max ESR (Ω)
Mode
3.200MHz to 4.499MHz
4.500MHz to 5.999MHz
6.000MHz to 6.999MHz
7.000MHz to 7.999MHz
8.000MHz to 8.999MHz
9.000MHz to 9.999MHz
±0.000MHz to ±2.999MHz
±3.000MHz to 30.000MHz
30.000MHz to 66.000MHz
27.000MHz to 40.000MHz
±50
±20
±00
90
FundamentalꢀAT
FundamentalꢀAT
FundamentalꢀAT
FundamentalꢀAT
FundamentalꢀAT
FundamentalꢀAT
FundamentalꢀAT
FundamentalꢀAT
3rd Overtone
ø0.45
4.88
80
Dimensions in mm
60
50
3.8 Max
40
80
40
FundamentalꢀBT
12.3+/-0.6
11.4+/-0.6
ORDERING INFORMATION
20
Load
Capacitance
or Series
Resistance
XX
TR = Taped
and reeled
A
XX
XX
DXT494
Series
DXT494
DXT49SM
10.000
Frequency
(MHz)
Mode of
Operation
Options
Frequency Temperature
Tolerance
ppm
Blank = Loose
Stability
ppm
A-AT Cut Fund
B-BT Cut Fund
T-3rd Overtone
119
Fax: 01371 875075 www.dubilier.co.uk Tel: 01371 875758
