EURO
QUARTZ
X42 CRYSTALS
4mm x 2.5mm x 0.6mm SMD
12.0MHz to 50MHz
SURFACE MOUNT CRYSTALS
DESCRIPTION
X42 crystals are micro-miniature surface-mount mount crystals. The
crystals have a gold plated ceramic base and a seam welded metal lid
providing a stable crystal with very low ageing. The rugged construction
ensures that this crystal has high shock and vibration resistance. The
crystal has been specifically designed for use in small hand-held
communication equipment such as PDAs, GPS and Bluetooth.
FEATURES
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Miniature size: 4.0mm x 2.5mm x 0.6mm height
Gold-plated ceramic base with metal seam-welded package
Very low ageing
Designed for hand-held equipment, PDAs, Blue Tooth, GPS
High shock and vibration resistance
SPECIFICATION
Frequency Range
AT-Cut Fundamental:
Calibration Tolerance at 25ºC*:
Frequency stability*
-10° to +60°C
-20° to +70°C
-30° to +85°C
Storage Temperature:
Equivalent Series Resistance:
Shunt Capacitance (C0):
Load Capacitance (CL):
Ageing:
Drive level:
Reflow Soldering:
Packaging:
OUTLINE & DIMENSIONS
12.0MHz to 50.0MHz
from ±5ppm
(±10, ±20 or ±30ppm standard)
from ±5ppm
from ±10ppm
from ±10ppm
-40°~+85°C
See table
2pF to 4pF typical, 5pF maximum
Series or from 10pF to 32pF
(Customer specified CL)
<±3ppm per year at +25°C
100 microW maximum
10s maximum at 260°C twice
or 180s at 230°C, once.
16mm EIA tape and reel
*Note: Tighter stability, tolerance and lower ESR values are available.
PART NUMBER GENERATION
EQUIVALENT SERIES RESISTANCE
Frequency
Range MHz
12.0 ~ 20.0
20.1 ~ 50.0
ESR
Crystal Cut/
Ohms Max.
Mode
AT Fund.
AT Fund.
80
60
Part numbers for X42 crystals are generated as follows:
Example:
12.000MHz X42/20/30/-10+60/12pF/60R
Nominal Frequency
Package
Calibration tolerance
at 25°C (±ppm)
Temperature Stability
over temp. range (±ppm)
Operating Temp. Range (°C)
(Lower and upper limits)
Load Capacitance
(Either SR for series or CL in pF)
Equivalent Series Resistance
(When special value is required)
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 Email: info@euroquartz.co.uk www.euroquartz.co.uk
