EURO
QUARTZ
FEATURES
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Low cost crystal for mass market applications
Surface mount version of HC49-4H crystal
Comprehensive stockholding of standard frequencies
Customized parts readily available
Industry-standard package
Low-profile versions available
49USMX CRYSTALS
49SMD Standard and Low Profile
OUTLINE & DIMENSIONS
DESCRIPTION
49USMX crystals are low profile surface mount crystals that have the
same footprint as standard HC49 or HC49-4H crystals. 49USMD
crystals are ideal for use in low cost, mass-market applications. The
crystal may also be specified with close tolerances when required.
SPECIFICATION
Frequency Range:
Calibration Tolerance:
Frequency Stability over Temp.
AT-Cut:
BT-Cut:
Operating Temperature Range:
Shunt Capacitance (C0):
Load Capacitance (CL):
Ageing:
3.2MHz to 70MHz
±30ppm at 25°C standard
±10ppm available
±30ppm over -10° ~ +60°*
±100ppm over -10° ~ +60°C*
-10° ~ +60°C to -40° ~ +85°C
4pf typical, 7pF maximum
Series or from 8pF to 32pF
(
Customer specified
)
±3ppm maximum in first year
±1ppm per year thereafter
(Ta = 25°C, drive 100 W)
100
m
W typical, 500
m
W maximum
260°C, 10s maximum
Hermetic seal, resistance weld
EIA 24mm tape and reel
1000 pieces per reel
Compliant
Drive Level:
Reflow Soldering:
Holder:
Packaging:
RoHS Status:
PART NUMBERING
49USMX part numbers are derived as follows:
Example:
16.000MHz 49USMX/30/50/-20+70/30pF/ATF
Nominal Frequency
Holder Style & Height
49USMX = 4.2mm
49USMXL = 3.2mm
49USMX25 = 2.5mm
*
Closer tolerances may be specified
ESR & OSCILLATION MODE
Frequency
Range
(MHz)
3.2~3.4
3.5~4.0
4.1~4.9
5.0~5.9
6.0~8.9
9.0~9.9
10.0~12.9
13.0~24.0
24.1~30.0
24.0~48.0
27.0~30.0
30.0~50.0
50.1~70.0
Crystal Cut
&
Oscillation Mode
AT Fund.
AT Fund.
AT Fund.
AT Fund.
AT Fund.
AT Fund.
AT Fund.
AT Fund.
AT Fund.
BT Fund.
AT 3rd OT
AT 3rd OT
AT 3rd OT
Max.
ESR
(Ohms)
300
150
120
100
80
60
50
45
40
40
150
100
80
Calibration Tolerance at 25°C
±ppm
Temperature Stability
(Over Operating Temperature Range)
±ppm
Operating Temperature Range
°C, lower and upper figure
(May also be shown as lower figure only)
Circuit Condition
SR = Series Resonant
Or 8pF to 32pF
Operating Mode
ATF = AT-Cut, Fundamental
BTF = BT-Cut Fundamental
AT3 = AT-Cut 3rd Overtone
*
If required the maximum ESR may be specified,
in which case use the suffix ‘/R40’ where for
instance a maximum ESR of 40
W
is required.
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk www.euroquartz.co.uk
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