EURO
QUARTZ
2.0 x 1.6 x 0.6mm SMD
FEATURES
Miniature package: 2.0 x 1.6 x 0.6mm
Gold-plated ceramic base with metal seam-welded package
Very low ageing
Optimized for Wi-Fi applications
High shock and vibration resistance
OUTLINE & DIMENSIONS
X21-W CRYSTALS
WI-FI APPLICATIONS
DESCRIPTION
X21-W crystals are ultra-miniature surface-mount mount crystals. The
crystals have a gold plated ceramic base with 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 optimized for WI-Fi applications: Bluetooth/ Bluetooth
Low Energy (BLE), Bluetooth Smart, Zigbee, ISM, Wi-Fi / WLAN, LPWAN
and others.
SPECIFICATION
Standard Frequencies*:
Operating Mode:
Calibration Tolerance at 25ºC:
Frequency stability
-20° to +70°C
-40° to +85°C
-40° to +105°C
Storage Temperature:
Equivalent Series Resistance:
Shunt Capacitance (C0):
Load Capacitance (CL):
Ageing:
Drive level:
Reflow Soldering:
Packaging:
20.0, 24.0, 25.0, 26.0, 27.120,
30.0, 32.0, 37.40, 38.40, 40.0,
48.0, 52.0MHz
AT-Cut Fundamental:
±10ppm
±10ppm
±15ppm
±30ppm
-50°~+105°C
2pF to 4pF typical, 5pF maximum
Series or from 10pF to 32pF
<±ppm per first year at +25°C
100 µW maximum
10s maximum at 260°C twice
or 180s at 230°C, once.
12mm EIA tape and reel
EQUIVALENT SERIES RESISTANCE
Frequency
Range MHz
20.0
24.0
30.0
38.0
~
~
~
~
23.9
29.9
37.9
54.0
ESR
Ω Max.
120
100
80
60
PART NUMBER GENERATION
Part numbers for X21-W crystals are generated as follows:
Example:
20.000MHz X21-W-18pF
Nominal Frequency
Package size and
WiFi optimisation
Load Capacitance
ENVIRONMENTAL PERFORMANCE
RoHS Status:
Storage Temperature Range:
Humidity:
Hermetic Seal:
Solderability:
Reflow:
Vibration:
Shock:
Compliant
-55° to +105°C
85% RH, 85°C for 48 hours
Leak rate 2x10
-8
ATM -cm
3
/s max.
MIL-STD-202F Method 208E
260°C for 10 sec (see diagram)
MIL-STD-202F Method 204,
35±5 mins, 50 to 2000Hz
MIL-STD-202F Method 213B, test
Condition E, 50g 11ms.
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk
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