STMicroelectronics BLUENRG-355VT

Overview

BLUENRG-355VT from STMicroelectronics is a programmable Bluetooth® Low Energy 5.2 System-on-Chip integrating an Arm® Cortex®-M0+ core (64 MHz), 256 KB flash, 64 KB RAM, and a dedicated BlueNRG radio coprocessor. It delivers -104 dBm RX sensitivity at 125 kbps (Coded PHY), +8 dBm programmable TX output, and supports up to 128 simultaneous BLE connections. Used in battery-powered medical sensors requiring long-range, low-latency wireless telemetry.

For engineers reviewing the BLUENRG-355VT datasheet, BLUENRG-355VT pinout, BLUENRG-355VT application, or BLUENRG-355VT equivalent, this page provides verified package mapping (WLCSP49), confirmed RF performance metrics, validated ultra-low power modes (10 nA SHUTDOWN), and real-world BLE 5.2 feature implementation including LE Power Control, Periodic Advertising Sync Transfer, and GATT Caching.

Technical Context

The BLUENRG-355VT implements a dual-processor architecture: the Cortex-M0+ handles application logic and non-time-critical BLE stack layers, while the hardware-accelerated BlueNRG core (DMA-based) executes timing-critical radio protocol operations-including packet scheduling, CRC generation, and PHY layer modulation/demodulation-enabling deterministic sub-millisecond interrupt latency.

Its RF subsystem uses a low-IF receiver with integrated balun and automatic gain control, paired with a direct-modulation transmitter supporting four data rates (125/500 kbps, 1/2 Mbps) and Coded PHY for extended range. The chip integrates an SMPS step-down converter (1.2–1.9 V output), dual LDOs (MLDO/LPREG), and independent RF LDO (RFLDO), enabling dynamic power domain gating across VDD12i (interruptible), VDD12o (always-on), and VDDIO (1.7–3.6 V).

Key Specifications

Pinout & Package

BLUENRG-355VT is housed in a WLCSP49 (3.140 × 3.140 mm) package with 0.4 mm pitch, optimized for space-constrained wearable and implantable devices. The package features 30 I/Os (31 5 V-tolerant), 28 with wake-up capability, and exposed VSSRF pads requiring direct connection to ground plane per STMicroelectronics layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Bluetooth Low Energy SoC applications.

Compared with nRF52840 and CC2642R, BLUENRG-355VT offers superior ultra-low power operation (10 nA SHUTDOWN), integrated SMPS for battery efficiency, and hardware-accelerated security (PKA, AES) tailored for regulated medical and industrial edge nodes where certification and longevity are critical.

Availability

BLUENRG-355VT is available at Aetrix Electronics and suitable for medical sensor nodes, fitness wearables, industrial asset tags, and smart lighting controllers requiring stable component supply across extended product lifecycles.

Supply support for BLUENRG-355VT 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, analog ICs, MEMS, and power management solutions for industrial, automotive, and consumer markets.

The BlueNRG-LP product line targets ultra-low power wireless applications demanding Bluetooth 5.2 compliance, 10+ year battery life, and hardware-enforced security-specifically engineered for medical, industrial IoT, and wearable endpoints.

FAQ

What is the maximum number of simultaneous BLE connections supported by BLUENRG-355VT?

The BLUENRG-355VT supports up to 128 physical BLE connections in concurrent master/slave/observer roles. This is implemented in hardware via the BlueNRG core coprocessor, enabling scalable mesh networking and multi-device hub functionality without software stack bottlenecks or additional memory overhead.

Does BLUENRG-355VT include an integrated DC-DC converter?

Yes, BLUENRG-355VT integrates a high-efficiency SMPS step-down converter configurable from 1.2 V to 1.90 V, with internal 4 MHz or 8 MHz clocking. It reduces active-mode current consumption by ~30% compared to LDO-only operation and remains functional down to 1.7 V input, making it ideal for single-cell battery systems.

How does the BlueNRG-355VT achieve -104 dBm RX sensitivity?

The -104 dBm sensitivity at 125 kbps (Coded PHY S=8) results from its low-IF receiver architecture with integrated balun, automatic gain control (AGC) at both RF and IF stages, and complex I/Q filtering. This design minimizes noise figure and maximizes signal-to-noise ratio under weak-signal conditions, validated per ETSI EN 300 328 testing.

Can BLUENRG-355VT operate across the full industrial temperature range?

Yes, BLUENRG-355VT is specified for continuous operation from -40°C to +105°C. Its internal oscillators (32 MHz HSE with trimming capacitors, 32 kHz LSE), SMPS regulator, and flash memory controller are characterized across this range, and the WLCSP49 package meets JEDEC J-STD-020 moisture sensitivity level 3 for reflow compatibility.