EURO
QUARTZ
49USMX CRYSTALS
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.
OUTLINE & DIMENSIONS
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
49SMD Standard and Low Profile
Frequency Range: 3.2MHz to 70MHz
Calibration Tolerance: ±30ppm at 25°C standard
±10ppm available
Frequency Stability over Temp.
AT-Cut: ±30ppm over -10° ~ +60°*
BT-Cut: ±100ppm over -10° ~ +60°C*
Operating Temperature Range: -10° ~ +60°C to -40° ~ +85°C
Shunt Capacitance (C0): 4pf typical, 7pF maximum
Load Capacitance (CL): Series or from 8pF to 32pF
()
Ageing: ±3ppm maximum in first year
±1ppm per year thereafter
(Ta = 25°C, drive 100 W)
Drive Level: 100 W typical, 500 W maximum
Reflow Soldering: 260°C, 10s maximum
Holder: Hermetic seal, resistance weld
Packaging: EIA 24mm tape and reel
1000 pieces per reel
RoHS Status: Compliant
*
Customer specified
Closer tolerances may be specified
mm
SPECIFICATION
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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
FEATURES
Frequency
Range
(MHz)
Crystal Cut
&
Oscillation Mode
3.2~3.4 AT Fund. 300
3.5~4.0 AT Fund. 150
4.1~4.9 AT Fund. 120
5.0~5.9 AT Fund. 100
6.0~8.9 AT Fund. 80
9.0~9.9 AT Fund. 60
10.0~12.9 AT Fund. 50
13.0~24.0 AT Fund. 45
24.1~30.0 AT Fund. 40
24.0~48.0 BT Fund. 40
27.0~30.0 AT 3rd OT 150
30.0~50.0 AT 3rd OT 100
50.1~70.0 AT 3rd OT 80
Max.
ESR
(Ohms)
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
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 is required.W
ESR & OSCILLATION MODE
