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Seiko Instruments' quartz crystals designed for easy mounting

Posted: 03 Oct 2005 ?? ?Print Version ?Bookmark and Share


Seiko Instruments offers four new quartz crystals that may be used with real-time clocks and timers or as a clock source for micro-computers. They can also be incorporated into cellular phones, PDAs, radio communication equipment and other portable equipment.

The new devices include the SSP-T7-F (7-by-1.5-by-1.4mm), VT-200-F (2-by-6mm), SP-T2A-F (8.7-by-3.7-by-2.5mm) and NC-T3 (3.2-by-1.2-by-1.1mm). These RoHS-compliant crystals are said to offer excellent shock and heat resistance capability and provide design flexibility for easy mounting and installation.

The ultra-thin SMD model SSP-T7-F is comprised of a plastic molded package with a highly reliable tubular-type quartz crystal, and is suitable for high-density surface mounting. The 32.768kHz crystal offers a frequency tolerance of 20ppm. Load capacitance is 7pF or 12.5pF.

Model VT-200-F uses Seiko's highly reliable photolithographic technology and features a compact tubular package. The 32.768kHz VT-200-F device offers a frequency tolerance of 10ppm or 20ppm. Load capacitance is 6pF or 12.5pF.

Designed for measurement conditions of 5V and 3V, model SP-T2A-F features a plastic molded package that incorporates a tubular-type quartz crystal. The 32.768kHz, 20ppm crystal offers a load capacitance of 6pF or 12.5pF.

Combining Seiko's photolithographic technology and new packaging technology, the ultra-small NC-T3 crystal is suitable for high-density surface-mount applications. The 32.768kHz, 20ppm crystal provides a load capacitance of 7pF or 12.5pF.

The VT-200-F device is priced at 16 cents; the SP-T2A-F at 45 cents; the SSP-T7-F at 60 cents, and the NC-T3 at $1.20, in quantities of 10,000 units.

- Gina Roos


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