The Most Flexible and Lowest Power Bluetooth® Low Energy Solution

The DA14581 integrated circuit is an optimized version of the DA14580, offering a reduced boot time and supporting up to 8 connections. It has a fully integrated radio transceiver and baseband processor for Bluetooth Low Energy. It can be used as a standalone application processor or as a data pump in hosted systems.

The DA14581 supports a flexible memory architecture for storing Bluetooth profiles and custom application code, which can be updated Over-the-Air (OTA). The qualified Bluetooth Low Energy protocol stack and the HCI-ready software are stored in a dedicated ROM. All software runs on the ARM® Cortex®-M0 processor via a simple scheduler.

The Bluetooth Low Energy firmware includes the L2CAP service layer protocols, Security Manager (SM), Attribute Protocol (ATT), the Generic Attribute Profile (GATT), and the Generic Access Profile (GAP). All profiles published by the Bluetooth SIG as well as custom profiles are supported. The transceiver interfaces directly to the antenna and is fully compliant with the Bluetooth 4.2 standard.

The DA14581 has dedicated hardware for the Link Layer implementation of Bluetooth Low Energy and interface controllers for enhanced connectivity capabilities.


  • Based on the same outstanding DA14580 SoC
  • Uses a dedicated ROM which offers optimizations targeting A4WP and HCI
  • Alliance for Wireless Power (A4WP)
    • Fast boot time for Power Receiving Unit (PRU)
    • 8 connections for Power Transmitting Unit (PTU)
  • Human Computer Interaction (HCI)
    • Optimized code for HCI which fits into the OTP
    • This enables customers/modules to provide a pre-programmed HCI device/module


  • WLCSP-34 (2.5mm x 2.5mm x 0.5mm)
  • QFN-40 (5.0mm x 5.0mm x 0.9mm)
  • Ultra-thin WLCSP-34 (2.436mm x 2.436mm x 0.334mm)


  • Bluetooth 4.2
  • Cortex-M0 application processor
  • Power supply 0.9V – 3.6V
  • Single pin RF I/O
  • Rich set of analog and digital peripherals
  • 8 connections
  • Optimized boot time
  • Supporting software upgrades Over-The-Air (OTA)



  • Wireless charging (A4WP)
  • HCI


PDF 3.26 MB Datasheet
Manual - Development Tools
Manual - Software
Manual - Development Tools
ZIP 92 KB Manual - Development Tools
PDF 1.06 MB Materials Composition Declaration
ZIP 6.03 MB Other
PDF 404 KB Other
PDF 2.06 MB Manual - Development Tools
PDF 2.36 MB Manual - Development Tools
PDF 1002 KB Other
PDF 4.71 MB Application Note
PDF 580 KB Other
PDF 1.73 MB Other
PDF 42 KB Other
PDF 6.97 MB Manual - Development Tools
PDF 10.02 MB Manual - Development Tools
PDF 4.14 MB Manual - Software
PDF 683 KB Application Note
PDF 2.44 MB 简体中文 Manual - Development Tools
PDF 769 KB Application Note
PDF 455 KB Application Note
PDF 1.17 MB Application Note
PDF 617 KB 简体中文 Manual - Development Tools
PDF 761 KB 简体中文 Manual - Development Tools
PDF 988 KB 简体中文 Manual - Development Tools
PDF 812 KB 简体中文 Manual - Development Tools
PDF 793 KB Application Note
PDF 2.10 MB Manual - Development Tools
PDF 411 KB Application Note
PDF 342 KB Application Note
PDF 353 KB Application Note
PDF 1.87 MB Application Note
PDF 594 KB Release Note
PDF 1.05 MB Manual - Development Tools
PDF 1.19 MB Manual - Development Tools
PDF 311 KB Application Note
PDF 169 KB Application Note
PDF 308 KB Application Note
PDF 81 KB Other
PDF 2.82 MB 日本語 , 简体中文 Product Brief
PDF 79 KB Datasheet
47 items

Design & Development

Software & Tools

Software & Tools

Software title
Software type
SmartBond™ - CodeLess™ AT Commands
The SmartBond™ CodeLess AT Commands platform enables control of the Bluetooth® Low Energy connectivity, sensor read-out and battery check of the device.
IDE and Coding Tool Renesas
Serial Port Service (SPS)
The Serial Port Service (SPS) emulates serial cable communication.
Emulator Renesas
SmartBond™ Development Tools
SmartSnippets™ Studio is a royalty-free software development platform for SmartBond™ devices.
Software Package Renesas
3 items

Software Downloads

ZIP 1.71 MB Software & Tools - Other
ZIP 6.80 MB Software & Tools - Other
PDF 416 KB Software & Tools - Other
ZIP 4.91 MB Software & Tools - Other
ZIP 3.63 MB Software & Tools - Other
PDF 2.72 MB Software & Tools - Other
PDF 680 KB Software & Tools - Software
ZIP 13.11 MB Software & Tools - Other
ZIP 9 KB Software & Tools - Other
9 items

Sample Code

Sample Code

Title Type Date Date
ZIP 12 KB Sample Code
1 item

Boards & Kits

Boards & Kits