Analogue, Mixed Signal, LSI


New package for clock oscillator with embedded crystal

19 April 2006 Analogue, Mixed Signal, LSI

Cypress Semiconductor has introduced a new package option for its CY25701 programmable spread spectrum crystal oscillator (SSXO) with a high-accuracy reference crystal in a single package. Cypress is now offering the device in an industry-standard 5,0 x 3,2 mm ceramic LCC package, said to be the smallest available for products of this kind. The new package option also provides the industry-standard pinout for easy drop-in replacement of other oscillators.

The onboard crystal in the CY25701LXC has been specified, designed, and tested to operate with Cypress's feature-rich, programmable peak reducing EMI solutions (PREMIS) spread spectrum chip. With a pre-matched oscillator and crystal, designers are assured of efficient operation, and can eliminate difficult-to-use, higher-order crystals or crystal oscillators. In addition, the frequency programmability of the SSXO enables designers to set a wide range of spread percentages for maximum electromagnetic interference (EMI) reduction.

Output frequency range can be programmed from 10 to 166 MHz. For EMI compliance requirements, the programmable spread spectrum feature provides a wide range of down- or centre-spread percentages (0,5 to 4,0%) for maximum EMI reduction. Depending on the application, the CY25701 provides up to a 20 dB EMI reduction, based on a worst-case harmonic.

For more information contact Simon Churches, Arrow Altech Distribution, +27 (0)11 923 9600, [email protected]



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