Datasheet

EURO
QUARTZ
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: [phone] Fax: [phone] Email: [e-mail] www.euroquartz.co.uk
7 x 5mm SMD, 4 pad or 2 pad
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.
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
FEATURES
OUTLINE & DIMENSIONS
Frequency Range
AT-Cut Fundamental: 6.0MHz to 45.0MHz
AT-Cut 3rd Overtone: 30.0MHz to 125.0MHz
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
-55 to +125°C from ±20ppm
Storage Temperature: -55°~+105°C
Effective Series Resistance: See table
Shunt Capacitance (C0): 2pF to 4pF typical, 7pF 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, 260°C twice
or 180s at 230°C, once.
Package: Ceramic base, metal lid,
Hermetic seal
Packaging: 16mm EIA tape and reel
1000 pieces per reel
SPECIFICATION
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 50
Frequency
Range MHz
Crystal Cut/
Mode
ESR
Ohms Max.
EFFECTIVE SERIES RESISTANCE
MQ & MQ2 CRYSTALS
PART NUMBER GENERATION
12.000MHz MQ/20/30/-10+60/18pF/60RExample:
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)
MQ
MQ2