RKE resonators

10 September 2002 Passive Components

Murata has introduced ultra-compact, lightweight SAW resonators for remote keyless entry systems, claimed to reduce the footprint by about 45%, the volume by 30% and the weight by 50%. Murata's SARCC_M_BX_O family measures 3,0 x 3,0 x 1,15 mm (max).

Six different frequencies range from 304,30 to 434,15 MHz and four initial tolerances are available: ±50, ±75, ±80 and ±100 kHz. This range makes it easy to choose the optimal product for a particular application. When lead-free solder (such as Sn-Ag-Cu) is used, reflow soldering can be at a peak temperature of 260°C.

As remote keyless entry systems have become more widely adopted, they have become smaller and more functional. SAW resonators reduce the number of components required in an oscillation circuit and eliminate the need to adjust the frequency. Consequently, they effectively reduce the size of remote keyless entry systems and the time, labour and cost of producing them.

The market also demands smaller and lower-priced components for these systems. By using thin-film processing and high-density mounting technologies, Murata has introduced SAW resonators using the tiny package from its SAW filters, optimising the cost-effectiveness of both products.

For more information contact Avnet Kopp, 011 809 6100, [email protected], www.avnet.co.za

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