Renesas has a family of control plane (I3C) switches and expanders to significantly improve signal integrity and performance in a wide variety of applications, including CPU/BMC/DIMM management for server and datacenter.

Renesas control plane (I3C) switches and expanders enable intelligent management of CPU, BMC, DIMM and other peripherals with significant performance and power benefits over other serial communication interfaces with easy-to-use bidirectional signaling capabilities in a small footprint.

Memory & Logic

Product Selection Table

    Processing table
    Part Number
    Function
    Description
    Supply Voltage (V)
    Temp. Range
    Pkg. Type
    Lead Count (#)
    RG3M47B12
    I3C Hub 2:4 Intelligent Switch (user-configuration)    		 I3C 2:4 Intelligent Switch I3C 2:4 Intelligent Switch User-configured 3.3 -40 to 85°C VFQFPN 28
    RG3M48B12
    I3C Hub 2:4 Intelligent Switch (pre-configured)     		I3C 2:4 Intelligent Switch I3C 2:4 Intelligent Switch Pre-configured 3.3 -40 to 85°C VFQFPN 28
    RG3M87B12
    I3C Hub 2:8 Intelligent Switch (user-configuration)    		 I3C 2:8 Intelligent Switch I3C 2:8 Intelligent Switch User-configured 3.3 -40 to 85°C VFQFPN 28
    RG3M88B12
    I3C Hub 2:8 Intelligent Switch (pre-configured)    		 I3C 2:8 Intelligent Switch I3C 2:8 Intelligent Switch Pre-configured 3.3 -40 to 85°C VFQFPN 28
    IML3112
    I3C Basic 1:2 Multiplexer    		 I3C 1:2 Bus Multiplexer 1:2 I3C Expander 1.8 0 to 125°C DFN 8
    IMX3102
    I3C 2:1 Bus Multiplexer    		 I3C 2:1 Bus Multiplexer 2:1 I3C Expander 1.8 -40 to 85°C DFN 8
    IMX3112
    I3C Basic 1:2 Bus Multiplexer    		 I3C 1:2 Bus Multiplexer 1:2 I3C Expander 1.8 0 to 125°C DFN 8
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    Documentation

    Title Type Date
    I3C/I²C Bus Multiplexer, IO Expander
    PDF187 KB
    Application Note
    Memory Multiplexer Family Overview
    PDF807 KB
    Overview
    I3C Bus Expander Family Overview

    Next-generation host interface bus delivers maximum flexibility, speed and performance for server and client motherboards. To get started on your I3C bus interface design visit renesas.com/i3c

    Video List
    I3C Bus Expander Family Overview

    News & Blog Posts

    Renesas Unveils Industry’s First I3C Intelligent Switch Family for Next Generation Server, Storage and Communications Systems News May 31, 2022
    Renesas DDR5 I3C Bus Extension and SPD Hub Devices Qualified for AMI Firmware News Apr 30, 2021
    Renesas I3C Bus Extension and SPD Hub Devices Qualified for ASPEED AST2600 Baseboard Management Controller News Sep 30, 2020

    Tools & Resources

    Interface & Connectivity Forum