Low phase noise clock synthesizer platform simplifies the design of multiple line rate cards
The new device is suitable for a wide range of demanding applications including 10G Ethernet, Synchronous Ethernet, SONET/SDH, FibreChannel, CDR, software controlled clock generation and other reference clocks. It can be used either as a stand-alone frequency synthesizer or as a companion chip to the ACS9522T ToPSync system synchronization solution, generating a low phase noise local reference clock that is aligned to the system timing recovered by the ACS9522T.
As a standalone frequency synthesizer, the ACS1790T offers flexibility with a 24-bit fractional feedback divider that generates any output frequency with a resolution of 0.5 parts-per-billion (ppb). This allows synthesis of any output frequency within the range of 10 MHz to 200 MHz on the LVPECL output and 2 KHz to 125 MHz on the LVCMOS output.
The part is packaged in a 4 mm x 4 mm 24-QFN package. All loop components are on-chip simplifying the circuit board layout and making the total solution footprint ideal for space-constrained applications. The combination of a high fractional resolution with a simple serial interface also makes the ACS1790T ideal for use in software-controlled loops where a translated but disciplined or traceable clock is required.
Availability and Pricing
The ACS1790T is available in production quantities and is priced at $9.00 each in 10,000-piece lots.
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