EURO
QUARTZ
MJ CRYSTALS
FEATURES
Miniature size: 5.0mm x 3.2mm x 1.0mm height
Gold-plated ceramic base with metal seam-welded lid
To minimize EMI the whole crystal may be grounded
High shock and vibration resistance
· Ideal for PDAs, GPS, PCMCIA, Wirles LAN etc.
DESCRIPTION
MJ crystals are miniature surface-mount crystals produced with a
ceramic substrate and seam-welded metal lid. Their compact size and
low mass make hem an ideal crystal for high-density applications.
SPECIFICATION
Frequency Range: 10.0MHz to 48.0MHz
Mode: AT-Cut Fundamental
Calibration Tolerance at 25ºC: from ±5ppm
(±10, ±20 or ±30ppm standard)
Frequency stability
-10° to +60°C from ±5ppm
-20° to +70°C from ±10ppm
-40° to +90°C from ±15ppm
Storage Temperature: -40°~+105°C
Effective Series Resistance: See table
Shunt Capacitance (C0): 2pF to 4pF typical, 5pF maximum
Load Capacitance (CL): Series or from 10pF to 32pF
(Customer specified CL)
Ageing: <±3ppm per year at +25°C
Drive level: 100 mW maximum
Reflow Soldering: 10s maximum at 260°C twice
or 180s at 230°C, once.
Package: Ceramic base, metal (Kovar) lid,
Hermetic seal
Packaging: 12mm EIA tape and reel
1000 pieces per reel
EQUIVALENT SERIES RESISTANCE (ESR)
Frequency
Range MHz
10.0 ~ 12.0 AT Fund. 80
12.0 ~ 16.0 AT Fund. 60
16.01~48.0 AT Fund. 50
ENVIRONMENTAL SPECIFICATION
RoHS Status: Compliant
Gross Leak: 1kg pressurized water immersion
test as per Euroquartz procedures.
Fine Leak: <5x10-8 atm cc/s -helium leak test
Shock: ±5ppm max. Free drop 3 times
from 75cm height onto a hard
wooden board or half sine wave
acceleration of 100g peak
amplitude for 11 ms duration, 3
cycles each plane.
Vibration: ±5ppm max., frequency 10 to
55Hz, amplitude 1.5mm or
10g rms. Duration 6 hours.
Solderability: MIL-STD-883, Method 2003
Humidity: 48 hours at 85°C, relative
humidity, non-condensing
Thermal Shock: Temperature cycling: Exposed to
-40°C for 30 minutes then to
+85°C for 30 minutes,
- duration 5 days.
Crystal Cut/
Mode
ESR
Ohms Max.
5 x 3.2 x 1.0mm SMD
OUTLINE & DIMENSIONS
PART NUMBER GENERATION
Part numbers for MJ crystals are generated as follows:
12.000MHz MJ/20/30/-10+60/18pF/60RExample:
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
(Optional - use 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
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