Watch Crystals come in variety of surface-mount packages.March 2, 2006 -
RoHS-compatible watch crystals, suited for real time clock applications, come in 6 package sizes from 3.2 x 1.2 mm to 10.4 x 4 mm. With nominal frequency of 32.768 kHz, products offer ±20 ppm standard calibration tolerance and 1 µW max drive level. Low power consumption types are available for portable battery-powered applications, while products manufactured in epoxy resin are suited for mass-market devices. Load capacitance is rated at either 7 or 12.5 pF.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Saelig Co., Inc.
1160-D2 Pittsford-Victor Rd.
Pittsford, NY, 14534
USA
Watch Crystals in Wide Range of Surface Mount Packages
Pittsford, NY: Saelig now offers RoHS- compatible watch crystals housed in a wide range of surface mount package styles for use in a variety of applications.
The crystals all feature a nominal frequency of 32.768kHz making them ideal for use in real time clock (RTC) applications with calibration tolerance of ±20ppm as standard on most devices (±50ppm standard on AG and FC series parts with ±20ppm also available).
Package sizes include 6 x 2mm, 8.7 x 3.8mm, 10.4 x 4mm, 7 x 1.5mm, 5 x 1.9mm and ultra-miniature 3.2 x 1.2mm. Low power consumption types are available for portable, battery-powered applications while low cost crystals manufactured in epoxy resin are suitable for mass-market devices.
Typical specifications include maximum drive levels of 1uW, aging of ±3ppm maximum in first year, load capacitance of 12.5pF (7pF available on some models) and operating temperature range from -40 to +85 deg C (-55 to +125 deg C storage temperature range).
Sourced from one Europe's largest designer and manufacturer of quartz crystals and oscillators, Euroquartz's surface mount watch crystals are supplied in standard EIA 16mm tape and reel packaging and are suitable for reflow soldering (10s maximum at 235 deg C or 10s maximum at 260 deg C twice or <230 deg C for 180s).
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