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Mixed-signal IC specialist enters frequency control market

Posted: 05 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:silicon laboratories? crystal oscillator? xo? voltage-controlled crystal oscillator? vcxo?

Touting high reliability, high performance, and short lead times, Silicon Laboratories Inc. has entered the frequency control market with the introduction of two families of high-frequency, low-jitter crystal oscillators (XOs) and voltage-controlled crystal oscillators (VCXOs) for applications up to 1.4GHz. These new Si530 and Si550 product families are said to include the industry's first quad-frequency XO and VCXO devices.

Both the Si530 and Si550 product families support operation over a frequency range from 10MHz to 1.4GHz with less than 0.3ps RMS jitter. These devices also offer significantly improved control voltage linearity as well as a wide selection of voltage gain and pull range options for greater design flexibility.

Leveraging the company's DSPLL technology, which simplifies the clock multiplication and jitter attenuation circuitry required in high-speed telecommunication applications, it allows for the replacement of multiple discrete phase-locked loop (PLL) components with a single IC that integrates digital signal processing (DSP) circuitry and an ultra-low jitter VCXO.

As a result, Silicon Laboratories is able to move frequency control and tuning from a complex resonator to a single CMOS IC, enabling the Si530 and Si550 families to deliver total frequency stability over time and temperature that is claimed to be more than two times better than traditional high-frequency, low-jitter oscillators. DSPLL-based frequency tuning also enables up to a tenfold improvement in initial frequency accuracy when compared to designs based on traditional high-frequency SAW or crystal resonators, according to the company.

In addition, the company said by leveraging the frequency synthesis capability of a mixed-signal IC to eliminate complex materials processing steps required to frequency tune traditional SAW- and crystal-based implementations, it simplifies the manufacturing process, and therefore, reduces typical lead times of eight weeks to one week.

The Si530 and Si550 devices are available in an industry standard, RoHS-compliant, 7-by-5mm surface mount package. They support all common output formats: PECL, LVDS, CMOS and CML.

Pricing for the Si530 and Si550 families ranges from $6.05 to $88.95 in quantities of 1,000, depending on specifications. Samples are available now with production volume scheduled for fourth quarter 2005.

- Gina Roos


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