STMicroelectronics BLUENRG-134

Overview

BLUENRG-134 from STMicroelectronics is a Bluetooth® LE 5.2 single-mode system-on-chip integrating an Arm® Cortex®-M0 core, 160 KB flash, 24 KB RAM with retention, and dual power regulation (LDO + DC-DC). It delivers +8 dBm RF output, 96 dB link budget, and ultra-low 1 µA sleep current with active BLE stack - enabling multi-year battery life in compact wearable and sensor nodes.

For engineers reviewing the BLUENRG-134 datasheet, BLUENRG-134 pinout, BLUENRG-134 application, or BLUENRG-134 equivalent, key selection criteria include its dual-package support (VFQFPN32/WLCSP34), integrated PDM stream processor for voice-enabled edge sensing, and certified compliance with ETSI EN 300 328, FCC Part 15, and ARIB STD-T66 radio regulations.

Technical Context

The BLUENRG-134 implements a tightly coupled BLE 5.2 protocol stack with GAP, GATT, SM, L2CAP, and AES-128 encryption handled in firmware, supporting both single-chip (Cortex-M0 runs app + stack) and network coprocessor modes (external MCU via SPI/UART). Its clock architecture uses a 16/32 MHz crystal oscillator (±50 ppm) for RF timing and a 32 kHz ring or crystal oscillator for RTC/wake-up.

Power management includes dynamic clock gating, per-peripheral clock enable/disable control (e.g., UART, I²C, ADC, MFT), and four low-power states (Preactive, Active, Standby, Sleep), with wake-up latency of 200 µs and configurable GPIO-triggered exit from Sleep using IO9–IO13 (VFQFPN32) or IO9–IO12 (WLCSP34).

Key Specifications

Pinout & Package

BLUENRG-134 is offered in two RoHS-compliant packages: VFQFPN32 (5 × 5 mm, 0.5 mm pitch) and WLCSP34 (2.14 × 2.14 mm, 0.4 mm pitch). Pin functions are identical across packages except for I²C1 availability (not present on WLCSP34) and GPIO count (14 vs. 15 pins).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Bluetooth® LE SoC applications.

Compared with nRF52810 and CC2640R2F, BLUENRG-134 uniquely combines ultra-low 1 µA Sleep current, integrated DC-DC, PDM processing, and on-die battery/temperature sensing - making it optimal for space-constrained, long-life, voice- or sensor-edge devices.

Availability

BLUENRG-134 is available at Aetrix Electronics and suitable for fitness trackers, smart lighting controls, medical sensor patches, and industrial proximity tags requiring stable component supply, full regulatory certification, and long-term lifecycle support.

Supply support for BLUENRG-134 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and wireless SoCs for industrial, automotive, and consumer markets.

BLUENRG-134 belongs to ST's BlueNRG family of ultra-low-power Bluetooth® LE SoCs, engineered specifically for battery-operated IoT endpoints where multi-year operation, compact size, and certified RF performance are non-negotiable.

FAQ

Does BLUENRG-134 support Bluetooth® Mesh networking?

No. BLUENRG-134 implements Bluetooth® Core Specification v5.2 as a single-mode LE device and does not include Bluetooth Mesh profile support in its precompiled stack library. Mesh functionality requires external application-layer implementation or migration to ST's BlueNRG-2 or BlueNRG-LP platforms, which provide certified Mesh stack options.

What is the maximum operating temperature for BLUENRG-134 in continuous TX mode?

The BLUENRG-134 is rated for continuous operation from –40°C to +105°C ambient. In sustained +8 dBm TX mode, junction temperature remains within specification if PCB thermal design provides ≥25°C/W thermal resistance from die to ambient - verified via thermal simulation and IR imaging per DS11481 Rev 13 Section 6.3.

Can the 160 KB flash be used for both application code and BLE stack storage simultaneously?

Yes. The 160 KB flash is unified memory space accessible by the Cortex-M0. In single-chip mode, the BLE stack library (object code) and application firmware share this space; typical allocation reserves ~48 KB for stack, leaving ~112 KB for user code and data - sufficient for complex sensor fusion or OTA update dual-bank schemes.

Is SWD debugging supported in all power modes?

SWD debugging is fully supported in Active and Preactive modes. It is disabled in Standby and Sleep modes because the debug access port (DAP) and SWD logic are powered down to achieve sub-µA currents; wake-up via GPIO or timer restores debug capability within 200 µs.