Bluetooth MCU

Mouser is stocking a 2.2 x 3mm Bluetooth MCU from Renesas, which can run from a 1.55V silver oxide cell.

Called DA14535, it is built around an Arm Cortex-M0+ and implements Bluetooth LE 5.3.

“By adding six external passives, a crystal oscillator, a power source, plus a 2.4GHz antenna, designers can build a complete Bluetooth Low Energy system for applications such as asset tracking and proximity tags,” said Mouser.

With two power inputs and a dc-dc converter that can buck or boost, the IC can run from 1.8 to 3.6V, or 1.2 to 1.6V.

The IC is also available on a 12.5 x 14.5 x 2.8mm module, DA14535MOD, that is worldwide certified and includes 1Mbit NOR flash, a 32MHz crystal and a printed antenna.

+3dBm of output is available, and communication with the host MCU is via two-wire UART.

For development there is a choice:

‘DA14535 USB’ has a mikroBUS connector, 2Mbits of SPI flash, and an onboard DA14535.

‘DA14535 Pro’ is two-part, with a motherboard plus the DA14535 on a daughterboard with a mini-USB cable. It provides two mikroBUS headers, Arduino Uno compatibility and 2Mbit SPI data flash, and “allows users to perform RF measurements using an embedded printed antenna and SMA connector”, said Mouser.

Find DA14535 on this Mouser web page.

Silicon Labs announced a pair of Bluetooth-enabled microcontrollers for asset tracking in January