Crystal oscillator raises frequency stability

A new miniature low-cost lead-free TCVCXO range offers frequency stability of +/-0.5ppm over the -40 to +85C temperature range.

A miniature low-cost lead-free TCVCXO (temperature compensated, voltage controlled crystal oscillator) range offering frequency stability of +/-0.5ppm over the -40 to +85C temperature range has been introduced by C-Mac Microtechnology.

Packaged as a standard 7 x 5mm SMD, the new CFPT-126 is available in a range of frequencies between 10 and 40MHz for use in GPS, communications, networking and instrumentation applications.

To help equipment manufacturers to comply with new environmental obligations, the CPFT-126 is designed for lead free soldering and compliant with all requirements of the RoHS regulations.

With a 3.3V supply voltage and HCMOS output at nominal frequencies of 10.0, 12.8, 13.0, 16.384, 19.44, 20.0, 26.0, 32.768 and 40.0MHz, the CFPT-126 is applicable to a range of applications including telecommunications, microwave and satellite communication systems, GPS, Ethernet products, and test and measurement equipment.

Its output frequency can be adjusted by more than +/-5ppm through voltage control to calibrate it to nominal after assembly.

The CFPT-126 is supplied on standard tape and reel and supports lead-free reflow soldering at 260C.

Storage temperature range is -55 to +125C, and typical ageing over the first year is +/-1ppm at 25C.

Components are held in stock for fast delivery.

"Despite their high stability, C-Mac can provide these new TCXOs as off-the-shelf products at off-the-shelf prices", said Mary Carbin, Business Development Manager with C-Mac Frequency Products.

"Not that we're expecting them to stay on the shelves for long at the price-performance point we are offering - we envisage a significant mass-market uptake in emerging GPS, comms and instrumentation applications".

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