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12/12/2017

Silicon Labs Launches Next Generation High Performance Oscillator for High Speed ​​Transceivers

Silicon Labs (also known as "core technology") has introduced a series of high-performance I2C programmable crystal oscillator (XO), with the best jitter performance and frequency flexibility. With typical jitter performance down to 95fs, the Si544 / Si549 Ultra Series ™ Programmable XOs provide maximum jitter margin for high-speed 28Gbps and 56Gbps transceivers in 100/200 / 400G communications and data center applications. These XOs can generate any frequency from 200kHz to 1.5GHz and have a 4ppt tuning resolution, making the single device suitable for a wide range of applications. xc2c512-10pqg208c

James Wilson, Sr. Director of Marketing for Clock Products at Silicon Labs, said: "The proliferation of optical networks, very large data centers and mobile forward / backhaul networks is accelerating, adding the need for ultra-low jitter clocking solutions. By choosing Silicon Labs The I2C configurable Si54x Ultra Series Oscillator allows system designers to easily use the industry's most programmable, programmable XOs with maximum frequency flexibility and maximizes SNR margin to reduce development risk and ensure a successful design. "

The Si544 / Si549 XO supports up to four preset, pin-selectable start-up frequencies. After power-up, the device operating frequency can also be easily changed via the I2C interface. The flexibility of this configuration allows a single oscillator to replace multiple single-frequency, dual-band or quad-band XO and mux devices. The devices can be powered from a single 1.8, 2.5 or 3.3V supply, eliminating the need to use different XO models for different supply voltages. The I2C interface of the Si54x XO supports up to 1MHz (Fast-mode Plus) update rates and is fully compatible with a wide range of ASSPs, ASICs, SoCs, and FPGAs. zhcs506ta

The Si544 / Si549 XOs support 3.2mm x 5mm and 5mm x 7mm packages, offering superior frequency flexibility over the standard fixed frequency XO in the same package. This compatibility enables hardware designers to prototype with I2C programmable XO and easily migrate to single-frequency XO as the design transitions to production.

The Si54x XO is designed for 56Gbps transceivers. These transceiver designs rely on Pulse Amplitude Modulation (PAM4) signals for serial data transmission. PAM4 uses fourth-order signals to increase the bit rate for each channel while keeping the bandwidth constant. This trade-off makes the design inherently more susceptible to noise and maximizes the signal-to-noise margin (SNR) margin by using ultralow jitter reference clocks such as Si544 / Si549 devices to help prevent bit errors and preserve Signal integrity.

The Si544 / Si549 oscillator utilizes Silicon Labs' advanced 4th generation DSPLL® technology to provide an ultra-low jitter clock source at any output frequency. The devices are programmable to any frequency from 200kHz to 1.5GHz with a resolution of 4ppt. On-chip power regulation Provides power supply noise rejection for consistent, reliable low-jitter operation in noisy environments common to high-speed networks and data centers. The Si544 / Si549 XOs also provide a flexible, reliable alternative to oscillators based on low-jitter surface acoustic wave (SAW) while providing excellent frequency tolerance and temperature stability. The Si544 / Si549 oscillator supports all popular output formats including LVDS, LVPECL, HCSL, CML, CMOS and Dual CMOS.

In addition to the Si544 / Si549 family of products, Silicon Labs is also expanding its XO / VCXO product family to include a wider range of package options. These amplified products include the Si54x Ultra Series XO, Si59x Universal XO / VCXO (3.2mm x 5mm), and Si51x Universal XO / VCXO (2.5mm x 3.2mm) in an industry standard 5mm x 7mm package. By expanding its product line-up, Silicon Labs can offer its customers a one-stop shop for high-performance oscillators.