Renesas offers the broadest and deepest silicon timing portfolio in the industry. In addition to a wide range of oscillator, buffer and clock synthesizer products, we offer leading-edge system timing solutions to resolve timing challenges in wireless infrastructure, networking, data center, and consumer applications. By partnering with industry leaders and investing more in timing insert products than anyone else in the industry, Renesas is consistently at the forefront of PCIe timing solutions for the newest chipsets in the cloud/computing market.

  • VersaClock® portfolio delivers unparalleled solutions at the perfect balance of power, performance, functionality and price.
  • FemtoClock™ portfolio pushed technology to new performance levels, enabling customers to bring to market amazing technology.
  • ClockMatrix™ portfolio features highly integrated, digitally rich PLLs which form the backbone of synchronization in communications and other emerging markets.

About Clock ICs and Clock Timing Integrated Circuit Solutions

A "clock IC" is a broad term used to describe integrated circuits that generate, condition, manipulate, distribute, or control a timing signal in an electronic system. At its most basic level, a clock timing signal oscillates between an electrical high and a low state and is utilized like a metronome to coordinate the actions of circuits. When applied to today's most advanced technologies, clocking ICs must be able to generate accurate clock pulses, and continuously and reliably distribute that signal for use by various timing devices within the system. When operating at such high speeds, system design and environmental factors make it especially challenging to maintain signal quality, often resulting in higher bit error rates (BER) and degraded system performance. Fortunately, Renesas offers a wide range of integrated circuit solutions to meet the stringent system requirements of virtually any application.

Featured Timing Applications


Clock Distribution

Buffers, multiplexers, dividers and level translators

Clock Generation

Programmable PLL-based clock signal sources

Jitter Attenuators with Frequency Translation

PLL devices which clean and synchronize to a given reference

Application-Specific Clocks

Solutions optimized for the specific needs of targeted applications

Crystal Oscillators

Programmable XOs with typical RMS phase jitter down to 120fs

VersaClock® Programmable Clocks

High-performance programmable clock generators to simplify system design


Document title Document type
Date Date
PDF 70 KB Application Note
PDF 1.92 MB Application Note
PDF 377 KB Application Note
PDF 692 KB Application Note
PDF 256 KB Application Note
PDF 872 KB Overview
PDF 2.40 MB Overview
PDF 400 KB White Paper
PDF 276 KB White Paper
9 items

News & Blog Posts

Semiconductor Industry Is Pulling AI Across a Diversity of End Uses and Applications Blog Post Jul 24, 2023
Renesas’ ClockMatrix System Synchronizer Delivers Class D Compliance for O-RAN S-Plane Requirements News Sep 28, 2022
The Low-Noise Power Supply for Timing and Clock ICs Blog Post Apr 25, 2022
Future-proof Your PCIe® Designs Blog Post Apr 14, 2022
Solving Common Issues with Respect to PCIe Timing Design on the Modern Server System Blog Post Apr 14, 2022
Renesas Introduces Industry’s First PCIe Gen6 Clock Buffers and Multiplexers News Apr 14, 2022
Renesas Introduces Second-Generation of ClockMatrix Family of Network Synchronizers and Jitter Attenuators for Optical and Wireline Networks News Dec 15, 2021
Renesas Expands ProXO Oscillator Portfolio for High-Performance Communications, and Data Center Applications News Sep 1, 2021
Benefits of a Point-of-Use Clock for Jitter Optimization Blog Post Apr 27, 2021
Renesas Expands FemtoClock Timing Portfolio for High-Performance Communications and Data Center Applications News Apr 26, 2021
Renesas Expands Communication Timing Portfolio for 4G/5G Radio News Mar 23, 2021
Renesas Expands Data Center Solutions Portfolio with Industry’s First CK440Q-Compliant Clock Generator for PCIe Gen5 and Beyond News Feb 4, 2021
Your Guide to Executing pcm4l Software Flawlessly Blog Post Jan 30, 2021
Board Space Is Key for Wearable Products Blog Post Jul 27, 2019
Faster Timing Design and Accurate Performance Testing with Jitter Measurement Utility Blog Post Jun 14, 2019
An Insider’s Guide to Finding the Right Timing Device for Your System Blog Post Dec 19, 2017