X4918 Datasheet, PDF (1/1 Pages) EUROQUARTZ limited – 4.9 x 1.8 x 1.0mm Miniature SMD

EURO QUARTZ
4.9 x 1.8 x 1.0mm Miniature SMD
X4918 SERIES CRYSTALS
32.768kHz
Ultra-miniature ceramic package 4.9 x 1.8 x 1.0mm
RoHS compliant and lead free
Low ageing, high shock and vibration resistance
Uses include battery operated equipment
DESCRIPTION
X4918 crystals provide 32.768kHz in an ultra-miniature package. The
part is designed to provide a small component size for real-time clock
applications. The micro-miniature size and rugged construction make
them ideal for real time clocks and battery powered, hand-held
equipment.
OUTLINE & DIMENSIONS
SPECIFICATION
Nominal Frequency:
32.7680kHz
Calibration Tolerance at 25ºC: ±20ppm
±30ppm (standard)
±50ppm
Crystal Cut:
XY-cut
Load Capacitance (CL):
12.5pF, 9.0pF or 7.0pF
Equivalent Series Resistance (ESR): 65kW typical, 70kW max.
Drive level:
1.0mW max.
Temperature Coefficient:
Turnover Temperature:
Quality Factor:
Shunt Capacitance:
Motional Capacitance:
Capacitance Ration:
Ageing:
Insulation Resistance:
Operating Temperature Range:
Storage Temerature Range:
Reflow Soldering:
Shock Resistance:
Packaging:
-0.034ppm/°C² (Parabolic)
+25°±5°C
40,000 min.
1.3pF typical
21fF typical
619 typical
±3ppm/year max.
500MW minimum @100VDC
-40° to +85°C
-55° to +125°C
10s max. at 250°C ±10°C
±5ppm max, free drops x3 from
75cm height onto hard wood
surface.
12.0mm EIA tape, 4.0mm pitch,
180mm diameter reel, 3k
pieces/reel
STABILITY OVER TEMPERATURE
X-Cut Crystal
PART NUMBER AND SPECIFICATION
Order part number: 32.768kHz X4918/30/--/-40+85/12.5pF
This provides a 32.768kHz crystal in X3215 package with ±20ppm
calibration tolerance at 25°C, temperature stability according to the
above parabolic coefficient at a load capacitance of 12.5pF.
Options:
Calibration Tolerance:
±20ppm
±30ppm (standard)
±50ppm
Load Capacitance:
7.0pF
9.0pF
12.5pF (standard)
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: [phone] Fax: [phone] [e-mail] www.euroquartz.co.uk