Complete Timing Solutions

Silicon Labs offers the industry’s broadest portfolio of crystal oscillator, clock generator, clock buffer, and jitter attenuator products and PCI Express (PCIe) clock generators and PCI Express buffers. Silicon Labs’ patented technology combines best-in-class frequency flexibility with the lowest jitter in the industry, delivering quick-turn, customized solutions that simplify board design, eliminate discrete components, and maximize system performance.

Programmable Oscillators Product Page Programmable Oscillators

Any frequency programmable differential/CMOS XOs with 24-hour lead times

Programmable Oscillators

Silicon Labs has partnered with Digi-Key to offer low jitter differential/LVCMOS programmable oscillators with 24-hour lead times. Frequency programming on-site by Digi-Key enables next-day prototypes of standard and custom frequencies, eliminating non-recurring expense (NRE) charges and minimum order quantities required by traditional XOs.

Customize an Oscillator or Clock


  • Any frequency from 100 kHz to 810 MHz
  • Stability options: ±20, 30, 50, 100, 150 ppm
  • Output format options: LVPECL, LVDS, LVCMOS
  • Voltage options: 1.8, 2.5, 3 V
  • Package options:
    • 5 mm x 7 mm
    • 3.2 mm x 5 mm
  • Output-enable polarity options: active high, active low

Oscillators Product Page Oscillators


Silicon Labs’ fixed frequency crystal oscillators (XO) takes programming out of the equation. Standard frequencies are available off the shelf. If you cannot find the frequency you need, you can program it here. (need to link to Programmable Oscillator).

Customize an Oscillator or Clock

Related Product Highlight: Si540 XO Ultra-Low Jitter Oscillator


  • Standard frequencies: 100MHz, 106.25MHz, 125MHz, 148.5MHz, 155.52MHz, 156.25MHz, 187.5MHz, 200MHz, 212.5MHz, 311.04MHz, 312.5MHz, 622.08MHz
  • Stability options: ±50 ppm
  • Output format options: LVPECL, LVDS, CML, HCSL, LVCMOS
  • Voltage options: 2.5, 3 V
  • Package options:
    • 5 mm x 7 mm
    • 3.2 mm x 5 mm
  • Output-enable polarity options: active high, active low

Clock Generator, PLL, Freq. Synth Product Page Clock Generator, PLL, Freq. Synth

Clock Generator, PLL, Freq. Synth

Silicon Labs’ clocks generate any combination of output frequencies from any input frequency, simplifying clock synthesis and minimizing the number of timing components needed in a design. These clocks provide industry-leading jitter performance and functional integration and can be customized for any application. Silicon Labs also offers innovative PCI Express and LVCMOS clocks that simplify design and minimize power consumption in cost-sensitive applications.


  • Supports frequencies up to 712.5MHz
  • MultiSynthTM technology enables any-frequency synthesis on any-output
  • Highly configurable outputs compatible with LVDS, LVPECL, CML, LVCMOS, HCSL
  • Specific PCI Express and LVCMOS outputs only clocks
  • I2C and/or SPI interface
  • Status monitoring: LOS, LOL

Clock Buffers Product Page Clock Buffers

Buffers, Drivers

Silicon Labs’ clock buffers provide ultra-low additive jitter and low skew clock distribution. In addition to differential and LVCMOS buffers, we offer universal clock buffers that support any in/out signal format and integrate clock muxing and division to further simplify clock tree design. Silicon Labs PCIe Zero-Delay Buffers is Intel qualified to the DB1900Z, DB800ZL and DB1200ZL specifications. The PCIe fanout buffers provide up to 9 outputs compliant to PCIe Gen1/2/3.


  • Integrated format translation
  • Ultra-low additive jitter
  • Integrated muxes, dividers, level translator
  • Pin configurability option
  • PCIe buffers supports push-pull output drivers for low power consumption and to optimize board space

Jitter Attenuators Product Page Jitter Attenuators

Jitter Attenuators

Silicon Labs’ jitter attenuators generate any combination of output frequencies from any input frequency with industry-leading jitter performance (300 fs RMS). Based on Silicon Labs’ innovative third-generation DSPLL architecture, these devices simplify clock tree design by replacing multiple clocks and oscillators, thereby minimizing BOM count and complexity.


  • Generates any frequency on any output (2kHz - 1.4GHz)
  • Ultra-low jitter
  • Integrated loop filter with selectable loop bandwidth
  • Synchronous and freerun modes
  • Fast-lock
  • In-circuit programmable

Application Specific Product Page Application Specific

Application Specific

Silicon Labs offers a comprehensive portfolio of clock generators and oscillators for data center, network communications, wireless base station, and industrial applications. PCIe clock generation and zero delay buffers meet PCIe Gen 1/2/3 specifications and feature low-power output driver technology that minimizes power consumption while optimizing board space. Ultra-low jitter programmable oscillators for optical 10/40/100G OTN and Ethernet applications. Highly integrated frequency flexible devices generate any combination of frequencies from any input frequency enabling replacement of multiple discrete crystal oscillators with a “clock-tree-on-a-chip” BOM consolidation.


  • Networking
  • Wireless Infrastructure
  • Data Center
  • Industrial
  • Consumer Electronics

Timing Design Tools

Timing Design Tools

Silicon Labs has multiple tools to help in any stage of the design cycle. From speeding up clock tree design to easily taking jitter measurements, these tools and software can assist in streamlining and selecting the best Silicon Labs products.

Software Design Tools: