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Jitter Reduced In Data Center Applications–Promise New Oscillators

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Silicon Labs has unveiled a new family of high-performance I2C-programmable crystal oscillators (XOs) claimed to provide very good jitter performance and frequency flexibility.

With typical jitter performance as low as 95 femtoseconds (fs), the Si544/Si549 Ultra Series programmable XOs maximize jitter margin for clocking high-speed 28 Gbps and 56 Gbps transceivers used in 100/200/400G communications and data center applications.

The devices are capable of generating any frequency from 200 kHz to 1.5 GHz with no frequency gaps and 4 parts-per-trillion (ppt) tuning resolution, enabling a single device to be used across a broad spectrum of applications, says the company.

“Optical networks, hyperscale data centers and mobile fronthaul/backhaul networks are moving to higher speeds, increasing the need for ultra-low-jitter timing solutions,” said James Wilson, Senior Marketing Director for Silicon Labs’ timing products. “By choosing Silicon Labs’ I2C-configurable Si54x Ultra Series oscillators, system designers will have peace of mind knowing that they are using the industry’s most frequency flexible programmable XOs while maximizing SNR headroom, de-risking development and helping to ensure first-pass design success.”

The Si544/Si549 XOs support up to four preset, pin-selectable start-up frequencies. After power-up, the device operating frequency can easily be changed via an I2C interface. This configuration flexibility enables a single oscillator to replace multiple single, dual and quad-frequency XOs and multiplexer (mux) devices with a single oscillator.

The device can be powered from a single 1.8, 2.5 or 3.3 V supply, eliminating the need for different XO part numbers for different supply voltages.

The Si54x XO’s I2C interface supports update rates as high as 1 MHz (Fast-mode Plus), maximizing compatibility with a broad range of ASSPs, ASICs, SoCs and FPGAs.

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In addition to the Si544/Si549 family, the company is adding a broader array of package options to its XO’s portfolio. These include Si54x Ultra Series XOs in the industry-standard 5 mm x 7 mm package, Si59x general-purpose XO/VCXOs (3.2 mm x 5 mm) and Si51x general-purpose XO/VCXOs (2.5 mm x 3.2 mm).

Samples and production quantities of the Si544/Si549 Ultra Series oscillators are available now.

Pricing in 10,000 unit quantities begins at $8.36 (USD) for Si549 XOs (95 fs rms jitter) and at $6.69 (USD) for Si544 XOs (150 fs rms jitter).

The company also offers a new Si5xxUC-EVB universal evaluation board, priced at $95 (USD MSRP), to allow easy device evaluation.

For more information about the Si54x Ultra Series family or to order samples and evaluation boards, visit www.silabs.com/ultra-series.

Click here for Press release.

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