EURO
QUARTZ
FEATURES
Miniature size: 7.0mm x 5mm x 1.2mm height
Gold-plated ceramic base with metal seam-welded lid
To minimize EMI the whole crystal may be grounded
Tight tolerance of ±10pppm for telecommunications use
High shock and vibration resistance
Ideal for PDAs, GPS, PCMCIA and hand-held equipment
MQ & MQ2 CRYSTALS
7 x 5mm SMD, 4 pad or 2 pad
·
OUTLINE & DIMENSIONS
DESCRIPTION
Miniature surface-mount MQ crystals are produced using a ceramic
substrate and fitted with a hermetically-sealed metal lid. The crystals
are competitively priced, well-suited to mass-market electronic
applications and may also be produced to close tolerances making this
crystal a good choice for applications requiring low mass and tight
tolerances. There are two package variants, 4 pad and two pad.
MQ
SPECIFICATION
Frequency Range
AT-Cut Fundamental:
AT-Cut 3rd Overtone:
Calibration Tolerance at 25ºC*:
Frequency stability
-10° to +60°C
-20° to +70°C
-40° to +90°C
-55 to +125°C
Storage Temperature:
Effective Series Resistance:
Shunt Capacitance (C0):
Load Capacitance (CL):
Ageing:
Drive level:
Reflow Soldering:
Package:
Packaging:
6.0MHz to 45.0MHz
30.0MHz to 125.0MHz
from ±5ppm
(±10, ±20 or ±30ppm standard)
from ±5ppm
from ±10ppm
from ±15ppm
from ±20ppm
-55°~+105°C
See table
2pF to 4pF typical, 7pF maximum
Series or from 10pF to 32pF
(Customer
specified CL)
<±3ppm per year at +25°C
100
mW
maximum
10s maximum, 260°C twice
or 180s at 230°C, once.
Ceramic base, metal lid,
Hermetic seal
16mm EIA tape and reel
1000 pieces per reel
MQ2
EFFECTIVE SERIES RESISTANCE
Frequency Crystal Cut/
ESR
Range MHz
Mode
Ohms Max.
6.0 ~ 11.0
AT Fund.
60
11.1 ~ 14.0
AT Fund.
50
14.1 ~ 45.0
AT Fund.
40
30.0 ~ 40.0 AT 3rd OT
100
40.1 ~ 50.0 AT 3rd OT
80
50.1 ~ 125
AT 3rd OT
90
PART NUMBER GENERATION
Example:
12.000MHz MQ/20/30/-10+60/18pF/60R
Nominal Frequency
Package
(MQ = 4 pad, MQ2 = 2 pad
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
Embedded System
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