The new Si5350/51 octal clock generators with on-chip voltage-controlled crystal oscillators (VCXOs) replace traditional multi-component phase-locked loop (PLL) solutions with a single clock IC that delivers twice the frequency flexibility, 70 percent lower jitter and 30 percent lower power than competing timing products. The Si5350/51 clocks are optimized for cost-sensitive consumer electronics products such as DVRs, HDTVs, set-top boxes and gaming systems as well as printers, projectors, video conferencing, blade servers, single-board computers, RAID systems, femtocells and telecom customer premises equipment.
The Si5350/51 clock generators leverage Silicon Labs’ patented MultiSynth technology to provide superior frequency flexibility, lower jitter, lower power and smaller footprint than any three-PLL or four-PLL clock generator on the market today. Unlike traditional clock generators that require a separate PLL to synthesize each non-integer related output frequency, the Si5350/51 devices synthesize a unique frequency on each of their eight output clocks. By integrating clock synthesis in the clock device’s output divider stage rather than its PLL, the Si5350/51 provides the equivalent clock synthesis capability of eight PLLs while dramatically reducing board space and power consumption.
The Si5350/51 generates all system clocks (audio, video, interface and SoC) and can synthesize any combination of eight unique, non-integer-related frequencies up to 133 MHz with 0 ppm frequency error. The Si5350/51 can also simultaneously generate free-running clocks from a crystal input as well as clocks synchronized to a reference clock or analog control voltage input, allowing multiple board-level timing domains to be clocked from a single device.
The device provides:
- Frequency synthesis capability of 8 PLLs
- Significantly lower jitter, lower power and smaller size
- Supports any frequency from 8 kHz to 133 MHz with 0 ppm frequency synthesis error
- Can replace both fixed-frequency clock ICs and crystal oscillators (XO)
The Si5350/51 features an integrated VCXO which eliminates the need for custom, pullable crystals. The Si5350/51 are optimized for low jitter clock generation in cost-sensitive consumer, enterprise and communications applications.