The RC31xxxB (RC31008B and RC31012B) are small-form factor, fully integrated, low-power, high-performance jitter attenuators with network synchronization capabilities. The family supports JEDEC JESD204B/C for converter synchronization and SyncE for network-based synchronization. The RC31xxxB are ideal for driving converter circuits in wireless and wireline infrastructure, data center equipment, and instrumentation applications. The devices are members of Renesas' high-performance VersaClock®7 family

Up to 27 configurations reusable across multiple designs may be stored in on-chip One-Time Programmable (OTP) memory or external I2C EEPROM. Redundant input available for backup and used as reference clock where needed.


  • 1.8V/2.5V/3.3V flexible power rails
  • Typical 150fs RMS 12kHz–20MHz phase jitter​
  • 5/8/12 outputs with integrated crystal options
  • 1kHz to 650MHz LVDS/LP-HCSL outputs
  • 1kHz to 200MHz LVCMOS outputs
  • Programmable hardware configuration select-pins
  • PCIe Gen5/6 ready
  • Space saving packages 4 × 4mm, 5 × 5mm, 6 × 6mm
  • JESD204B/C support on differential or single-ended outputs with DC-coupling or AC-coupling
  • Digital holdover and hitless switching
  • Integrated crystal option for space saving and BOM optimization
  • ITU-T G.8262 and G.82621 compliant for easy synchronized ethernet application




  • Switches / Routers
  • Synchronous Ethernet (SyncE) equipment
  • Telecom Time Slave Clock (T-TSC) equipment
  • Jitter attenuation for 10 / 25 / 40 / 100 / 200 / 400 Gbps Ethernet PHYs or Switches
  • Small Cell for 4.5G and 5G


Design & Development

Software & Tools

Software & Tools

Software title
Software type
Renesas IC Toolbox (RICBox)
The Renesas IC Toolbox (RICBox) software platform enables customers to configure Renesas devices on evaluation kits when attached to the computer running the software.
Software Package Renesas
1 item

Software Downloads

Type Title Date
PCB Design Files ZIP 18 KB
PCB Design Files ZIP 657 KB
2 items

Boards & Kits

Boards & Kits


VersaClock®7 Evaluation Board Demonstration

Learn more about how to configure the VersaClock®7 evaluation board using the supporting RICBox software. VersaClock®7 devices achieve any frequency-in, any frequency-out for high speed SerDes used in switches routers, accelerator cards, and server applications.