The 5X35023 VersaClock® programmable clock generator is designed for low-power, consumer, and high-performance PCI Express applications. The device is a three-PLL architecture design, and each PLL is individually programmable and allows for up to five unique frequency outputs.

The 5X35023 has built-in unique features such as Proactive Power Saving (PPS), Performance-Power Balancing (PPB), Overshoot Reduction Technology (ORT), and Extreme Low Power DCO. An internal OTP memory allows the user to store the configuration in the device without programming after power up, then program the 5X35023 again through the I²C interface.

The device has programmable VCO and PLL source selection to allow the user to do power-performance optimization based on the application requirements. It also supports one single-ended output and two pairs of differential outputs that support LVCMOS, LP-HCSL, LVDS, and LVPECL. A low-power 32.768kHz clock is supported with only less than 2μA current consumption for a system RTC reference clock.


  • Integrated crystal in the package for board space saving
  • Configurable OE pin functions as OE, PD#, PPS, or DFC control function
  • Configurable PLL bandwidth/minimizes jitter peaking
  • PPS: Proactive Power Saving features save power during the end device power down mode
  • PPB: Performance Power Balancing feature allows minimum power consumption based on required performance
  • DFC: Dynamic Frequency Control feature allows up to 4 different frequencies to switch dynamically
  • Spread spectrum clock support to lower system EMI
  • I²C interface
  • Supported by Renesas' Timing Commander™ software tool




  • PCIe Gen1/2/3 clock generator
  • Consumer application crystal replacements
  • Smart device, handheld, computing, and consumer applications


Design & Development

Software & Tools

Software & Tools

Software title
Software type
Timing Commander
Timing Commander™ is an innovative Windows™-based software platform enabling system design engineers to configure, program, and monitor sophisticated timing devices with an intuitive and flexible graphical user interface (GUI).
Code Generator Renesas
1 item

Software Downloads

Type Title Date
Software & Tools - Other Log in to Download ZIP 5.84 MB
Software & Tools - Software Log in to Download ZIP 18.02 MB
2 items

Boards & Kits

Boards & Kits


VersaClock 3S Low-Power Programmable Clock Generator ICs

A brief introduction to IDT's (acquired by Renesas) VersaClock 3S programmable clock generator IC features, benefits, and applications. These clock timing devices provide an optimal combination of performance, power, and flexibility.

IDT's VersaClock 3S devices meet the performance requirements of widely used standards including PCI Express® Gen 1/2/3. These new devices are ideal for computing systems, digital cameras, IP set-top boxes, home entertainment, audio systems, multi-function printers, IoT gateways, small-business storage, smart devices, medical equipment, and automotive infotainment.

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