Smartbond™ DA14581

SmartBond™ DA14581

The Bluetooth low energy solution for A4WP and HCI applications

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The go-to solution for A4WP & HCI

DA14581 is the world’s smallest, lowest power and most integrated Bluetooth® low energy solution for A4WP wireless charging and HCI applications. SmartBond™ DA14581 is an optimized version of the outstanding DA14580 SoC. A fast boot time for the Power Receiving Unit (PRU) and 8 connections for the Power Transmitting Unit (PTU) make the DA14581 a perfect solution for A4WP. The optimized code for HCI, which fits into the DA14581’s OTP memory, enables you to create a pre-programmed HCI device.


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


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


  • Wireless charging (A4WP)
  • HCI
WLCSP-34, 2.5 x 2.5 x 0.5 mm
QFN40, 5 x 5 x 0.9 mm
Ultra-thin WLCSP-34, 2.436 x 2.436 x 0.334 mm

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