Bluetooth® low energy wireless system-on-chip

The BlueNRG-2 is a very low power Bluetooth low energy (BLE) single-mode system-on-chip, compliant with Bluetooth specification.

The BlueNRG-2 extends the features of award-winning BlueNRG network processor, enabling the usage of the embedded Cortex M0 for running the user application code.

The BlueNRG-2 includes 256 KB of programming Flash memory, 24 KB of static RAM memory with retention (two 12 KB banks) and SPI, UART, I²C standard communication interface peripherals. It also features multifunction timers, watchdog, RTC and DMA controller.

An ADC is available for interfacing with analog sensors, and for reading the measurement of the integrated battery monitor. A digital filter is available for processing a PDM stream.

The BlueNRG-2 offers the same excellent RF performance of the BlueNRG radio, and the integrated high efficiency DC/DC converter keeps the same ultra-low power characteristics, but the BlueNRG-2 improves the BlueNRG sleep mode current consumption allowing a further increase in the battery lifetime of the applications.

Key Features

  • Bluetooth low energy single mode system-on-chip compliant with Bluetooth 5.0 specifications:
    • master, slave and multiple simultaneous roles
    • LE data packet length extension
  • Operating supply voltage: from 1.7 to 3.6 V
  • Integrated linear regulator and DC-DC step-down converter
  • Operating temperature range: -40 °C to 105 °C
  • High performance, ultra-low power Cortex-M0 32-bit based architecture core
  • Programmable 256 kB Flash
  • 24 kB RAM with retention (two 12 kB banks)
  • 1 x UART interface
  • 1 x SPI interface
  • 2 x I²C interface
  • 14, 15 or 26 GPIOs
  • 2 x multifunction timer
  • 10-bit ADC
  • Watchdog and RTC
  • DMA controller
  • PDM stream processor
  • 16 or 32 MHz crystal oscillator
  • 32 kHz crystal oscillator
  • 32 kHz ring oscillator
  • Battery voltage monitor and temperature sensor
  • Up to +8 dBm available output power (at antenna connector)
  • Excellent RF link budget (up to 96 dB)
  • Accurate RSSI to allow power control
  • 8.3 mA TX current (@ -2 dBm, 3.0 V)
  • Down to 1 µA current consumption with active BLE stack (sleep mode)
  • ST companion integrated balun/filter chips are available
  • Average advertisement current consumption 15.34 µA (advertisement interval 1000 ms) – 1 year, 8 months, 19 days with 230 mAh battery (CR2032)
  • Average connection current consumption 7.059 µA (connection interval 1000 ms) – 3 years, 10 months, 12 days with 230 mAh battery (CR2032)
  • Suitable for building applications compliant with the following radio frequency regulations: ETSI EN 300 328, EN 300 440, FCC CFR47 part 15, ARIB STD-T66
  • Pre-programmed bootloader via UART
  • QFN32, QFN48 and WCSP34 package options


Technical Documentation

Product Specifications
Description Version Size
DS12166 DS12166: Bluetooth® low energy wireless system-on-chip 2.0 5 MB
Application Notes
Description Version Size
AN4872 AN4872: BlueNRG-1 and BlueNRG-2 UART bootloader protocol 2.0 1 MB
AN4820 AN4820: BlueNRG-1 and BlueNRG-2 low power modes 2.0 745 KB
AN4869 AN4869: BlueNRG-1, BlueNRG-2 BLE OTA (over-the-air) firmware upgrade 2.0 2 MB
AN4818 AN4818: Bringing up the BlueNRG-1, BlueNRG-2 devices 5.0 1 MB
AN4392 AN4392: Using the BlueNRG family transceivers under ARIB STD-T66 in the 2400 – 2483.5 MHz band 3.1 539 KB
AN4387 AN4387: Using the BlueNRG family transceivers under ETSI EN 300 328 in 2400 –2483.5 MHz band 3.0 4 MB
AN4378 AN4378: Using the BlueNRG family transceivers under FCC title 47 part 15 in the 2400 – 2483.5 MHz band 3.0 1 MB
Programming Manuals
Description Version Size
PM0257 PM0257: BlueNRG-1, BlueNRG-2 BLE stack programming guidelines 2.0 1 MB

Publications and Collaterals

Description Version Size
BlueNRG-2 The new generation Bluetooth® Low Energy System-on-Chip 3.0 248 KB
High-quality RF IPD baluns for ISM bands simplify RF complexity. 2.2 1 MB

Tools and Software

Embedded Software
Evaluation Tool Software
Wireless Connectivity Software
Evaluation Tools
Solution Evaluation Tools
Support & Community
Featured Products

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
BLUENRG-232 VFQFPN 5X5X1.0 32L WET FLK Tape And Reel - - Active 1.95 1000 5A002A1A 5A992C - MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY
BLUENRG-248 VFQFPN 6X6X0.85 48L P0.4 WF Tape And Reel - - Preview - - 5A002A1A 5A992C - MORE INFO No availability reported, please contact our Sales office
BLUENRG-234 WLCSP MSL1 Tape And Reel - - Preview 1.88 1000 5A002A1A 5A992C - MORE INFO No availability reported, please contact our Sales office
BLUENRG-232WS VFQFPN 5X5X1.0 32L WET FLK Tape And Reel - - Preview - - 5A002A1A 5A992C - MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
BLUENRG-232 ActiveVFQFPN 5X5X1.0 32L WET FLKIndustrialEcopack3 0 0
BLUENRG-248 PreviewVFQFPN 6X6X0.85 48L P0.4 WFIndustrialEcopack3
BLUENRG-234 PreviewWLCSP MSL1IndustrialN/A
BLUENRG-232WS PreviewVFQFPN 5X5X1.0 32L WET FLKIndustrialEcopack3 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.