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Single, dual frequency crystal oscillators roll

Posted: 07 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:clock management? PLL modules? crystal oscillator?


ON Semiconductor has expanded its high-performance clock and data management portfolio with the introduction nine new PureEdge PLL-based clock modules for crystal oscillator (XO) replacement. The NBXxxxx series of devices are suitable for high-speed networking, telecom and high-end computing applications.

"The new clock modules from ON Semiconductor represent the company's entry into the frequency control market, leveraging its long leadership position in high performance, ultralow jitter clock distribution," said Dan Huettl, ON Semiconductor general manager and director of the advanced logic division. "These new silicon-based crystal oscillators are simpler to manufacture and provide superior jitter performance compared to expensive crystal oscillators. This supports lower overall system costs and shortened lead times."

The new NBXSBA010, NBXDBA012, NBXDBA014, NBXDBA015, NBXDDA016, NBXDBA017, NBXDBA018, NBXSBA020 and NBXSBA021 crystal oscillator modules use a high Q fundamental mode crystal and analog PLL multiplier to provide single or dual frequency, ultralow jitter and phase noise LVPECL/CML differential output.

The NBXSxxx (single frequency)/NBXDxxx (dual frequency) family of crystal oscillators include the industry's domain jitter performance and exceptional device noise floor of -163dBc/Hz at 10MHz offset with Phase RMS jitter of 0.4ps when integrated 12Hz to 20MHz allowing bigger clock timing margins for whole system clock tree.

They create sub-picosecond jitter quality clocks delivering single and/or dual frequency of 100MHz, 106.25MHz, 125MHz, 155.52MHz, 156.25MHz, 200MHz, 212.5MHz, 250MHz, 311.04MHz and 312.5MHz that are ideal for 1x/2x FibreChannel, SATA, iSCSI, PCIe, SONET / SDH, Ethernet and clock margining applications.

Power supply rating for the device is 3.3V while low phase RMS jitter is 0.4ps (12kHz-20MHz). The device is also claimed to offer the industry's best period jitter of RMS = 0.6ps; Pk-Pk = 5ps (JEDEC Standard: 10,000 cycles). On Semi added that the device has an industry best cycle to cycle jitter RMS = 1ps; Pk-Pk = 7ps (JEDEC Standard: 1,000 Cycles).

The devices are available in the 5mm x 7mm SMD (CLCC-6) package. The NBXSxxx (single frequency) and NBXDxxx (dual frequency) are budgetary priced at $5.99 for the 50PPM (frequency accuracy) and $7.50 for 20PPM (frequency accuracy) per unit for 1,000 unit quantities.

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