Microcontroller module supporting Bluetooth® 5.0 Low Energy for IoT endpoint devices

The SX-32BT is a Bluetooth® 5.0 Low Energy compatible microcomputer module based on a 32-bit RX microcomputer, the "RX23W", from Renesas Electronics. Certified for North America, Europe, and Japan, the module's design also includes a PCB antenna. Furthermore, it adopts a 0.7mm pitch LGA package, ideal for OEM's looking to increase the efficiency of their manufacturing process while lowering the total BOM cost of their product.

Simpler Development of IoT Devices with Renesas Development Tools

The SX-32BT has the ability to leverage the development environment and software of Renesas's RX23W chip, which is available on the Renesas website, and includes sample code and numerous support tools to aid in your development process.


  • Renesas IDE covers all aspects of development
  • Easily Create Projects and Code Especially for Renesas MCUs
  • Easy-to-Use Eclipse C/C++ Development Tooling (CDT) Editor
  • General debugging functions
  • Bluetooth drivers built into the Renesas BSP


Product Name SX-23BT
MCU RX23W made by Renesas
Memory 512KB ROM / 64KB RAM (MCU built-in)
Bluetooth® Bluetooth® 5.0 Low Energy Class2 compliant
Antenna Chip antenna x 1
MHF4 connector x 1
Interface(s) USB2.0 FS (Host / OTG) x 1
CAN (ISO11898-1 compliant) x 1
SD Host (Memory / IO) x 1
Operating Voltage DC 3.3V

16mm x 10mm x 2.7mm

Package Type Surface Mount Type
(76 Signal + 43 Exposed Ground)
Equipped with RX23W made by Renesas Electronics 
ROM 512KB / RAM 64KB
E2 flash 8KB
Trusted Secure IP Lite (AES / TRNG)

Full support for Bluetooth® 5.0 Low Energy
Built-in AES-CCM (128-bit) encryption circuit for Bluetooth®
Adopted 0.7mm pitch LGA package
Selectable chip antenna and external antenna terminal
Main Interfaces 
         • USB2.0 full speed x 1
         • CAN x 1
         • SD Host I/F x 1
Modular Certifications 
         • TELEC (Japan)
         • FCC (US)
         • ISED (Canada)
         • CE (Europe)
             * Silex can offer services to get certification for additional regions.                 
Industrial temperature compatible (-40 ℃ to 85 ℃)

SX-23BT Module Hardware Specifications (Subject to change without notice)
Application Notes:

SX-23BT-EVK Quick Start Guide

SX-23BT-EVK Guide to Establish High-Speed Serial Communications

For additional inquiries, please send in your request to

Ready to Get Started?

Evaluate Now