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Miniature crystal oscillator offers massive performance

Posted: 23 Mar 2009 ?? ?Print Version ?Bookmark and Share

Keywords:crystal oscillator? miniature oscillator? SG-3050BC 32.768kHz?

SG-3050BC crystal oscillator

Epson Toyocom Corp. has developed what it claims is the world's smallest 32.768kHz crystal oscillator based on its recent research. The maximum dimensions of the new crystal oscillator, known as the SG-3050BC, are just 2.2mm x 1.4mm x 1.0tmm.

With a footprint and cubic volume that are 70 percent and 75 percent smaller, respectively, than the 3.6mm x 2.8mm x 1.2tmm dimensions of its predecessor (SG-3030LC), the new crystal oscillator will help electronic equipment manufacturers further downsize their products while boosting performance. Samples of the SG-3050BC will be available from March 2009.

In today's world, 32.768kHz crystal devices are indispensable as clocks, microcontroller subclocks and timer functions in a variety of applications, including compact portable consumer products such as cellphones and digital still cameras. They are also essential for industrial measuring instruments and machine tools and for in-vehicle systems such as navigation systems, GPS modules and engine control units.

Moreover, 32.768kHz reference clocks are also combined with 32.768kHz tuning-fork crystal units and oscillation circuits for use in a single package.

In recent years, heightened awareness of the need to reduce environmental impacts has been driving demand for ever more compact electronic devices that maintain greater functionality while consuming fewer raw materials and less power. As tuning-fork crystal units and oscillation circuits become smaller, it is becoming increasingly difficult to design combinations with equal or superior stability and power consumption compared to their predecessors. There is demand for smaller oscillators that satisfy such performance requirements. Epson Toyocom has responded by developing the ultra-compact 32.768kHz SG-3050BC crystal oscillator.

According to the press release, the SG-3050BC, equipped with an ultra-compact QMEMS crystal chip, is the world's smallest 32.768kHz crystal oscillator with built-in crystal unit. Epson Toyocom was able to shrink the size of this oscillator by using a new structure that applies the company's original NPO (New Platform Oscillator) structure, wherein a crystal unit in a ceramic package is sealed together with an oscillation circuit in a molded plastic housing. Combining a compact crystal unit with an oscillation circuit rather than providing them separately significantly shrinks the space required. The crystal oscillators will also pay dividends in the form of greater system reliability and quality, since the crystal unit's characteristics will be assured prior to shipment, alleviating the need for customers to design oscillation circuits or adjust output frequencies.

The SG-3050BC also outperforms the previous SG-3030 series, boasting an operating voltage range of 1.2V to 5.5V and initial frequency tolerance of 5.0 5.0 x 10-6.

Epson Toyocom's SG-3050BC will help customers add value to their systems by allowing them to use space more efficiently in feature-rich electronic equipment.

- Henri Arnold
EE Times Europe

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