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Timing devices from Micrel aimed at PCIe market

Posted: 20 Dec 2013 ?? ?Print Version ?Bookmark and Share

Keywords:Micrel? PCIe? timing device? clock generator? Spread Spectrum Technology?

Micrel Inc. has introduced the PL6020xxx and PL6070xxx clock generators along with the SY7557xL clock distribution family that claim to deliver extremely low phase noise for the PCI-Express (PCIe) reference clock signals and industry leading output-to-output skew. The devices exceed the requirements of the PCIe Gen1, Gen2, and Gen3 standards and support Spread Spectrum Technology (SST) for EMI reduction, stated the firm.

Micrel's PCIe clock generators feature 1, 2, 4 or 8 outputs with sub-200fs phase jitter and output-to-output skew of 50ps. SST in the PL6070xxx is also supported for EMI reduction. The clock synthesizers accept a fundamental crystal or reference input of 25MHz and produce output frequencies ranging from 25-200MHz with 100MHz phase noise performance of -135dBc at 10kHz offset. In addition, the PCIe clock synthesizers support 2.5V and 3.3V power supply operation offering design flexibility with reduced power dissipation.

Micrel's SY75576L and SY75578L clock buffers with 4 and 8 outputs, respectively, provide high performance solutions for new and existing PCIe system designs. The SY75576L and SY75578L offer ultra-low additive phase jitter of sub-150fs with sub-50ps output-to-output skew for stringent PCI Express based server, storage and networking applications. The products' robust performance enables simplified system level design and PCB layout for quick time to market, noted Micrel.

All devices are production released with Industrial temperature range of -40°C to 85°C .The ICs have Green, RoHS and PFOS compliant packaging. The devices are offered in 6-pin SOT (1 output), 16-pin 3 x 3mm QFN (2 outputs), 24-pin 4 x 4mm QFN (4 outputs), or 44-pin 7 x 7mm QFN (8 outputs) package options.

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