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STMicroelectronics BLUENRG-355MT
- Part No.:
- BLUENRG-355MT
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-TFQFN Exposed Pad
- Datasheet:
-
BLUENRG-355MT.pdf
- Description:
- IC RF TXRX+MCU BLE 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,901
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Product details
Overview
BLUENRG-355MT 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 concurrent BLE connections. Used in battery-powered medical sensors and industrial edge nodes requiring long-range, low-latency wireless telemetry.
For engineers reviewing the BLUENRG-355MT datasheet, BLUENRG-355MT pinout, BLUENRG-355MT application, or BLUENRG-355MT equivalent, key selection criteria include its dual-role BLE 5.2 stack support, integrated SMPS for sub-1 µA DEEPSTOP current (1.8 V), hardware AES-128/PKA security accelerators, and WLCSP49 package compatibility with space-constrained PCB layouts.
Technical Context
The BLUENRG-355MT implements a partitioned BLE protocol stack: time-critical layers (PHY/MAC/LL) run on the dedicated BlueNRG core coprocessor (DMA-based), while host stack and application code execute on the Cortex-M0+. Its RF subsystem uses a low-IF RX architecture with integrated balun and supports Coded PHY (S=8) for extended range.
Power management integrates a programmable SMPS (1.2–1.9 V output), LPREG (1.0 V in DEEPSTOP), and RFLDO (1.2 V for RF block). Memory hierarchy includes four 16 KB SRAM banks (SRAM0 retained in DEEPSTOP), 256 KB flash with page erase, and 1 KB OTP for secure key storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BLE Version | Bluetooth 5.2 compliant: enables simultaneous master/slave roles, periodic advertising sync transfer, and LE power control for adaptive link budgeting. |
| RX Sensitivity | -104 dBm @ 125 kbps (Coded PHY): extends outdoor range to >1 km in line-of-sight industrial monitoring deployments. |
| TX Output Power | +8 dBm programmable (at antenna connector): allows direct drive of PCB trace antennas without external PA in compact wearables. |
| Core MCU | Arm Cortex-M0+ @ 64 MHz with MPU: executes BLE host stack and application logic with 18 µA/MHz dynamic efficiency. |
| Memory | 256 KB flash / 64 KB SRAM (4×16 KB banks): supports over-the-air firmware updates and multi-threaded RTOS operation with memory protection. |
| Security | Hardware AES-128, PKA (ECDH), RNG, 64-bit UID: enables FIPS-compliant key generation and encrypted OTA updates for HIPAA-compliant medical devices. |
| Operating Temp | -40 °C to +105 °C: qualified for under-hood automotive telematics and factory-floor industrial gateways. |
Pinout & Package
BLUENRG-355MT is housed in a WLCSP49 (3.140 × 3.140 mm) package with 0.4 mm pitch, optimized for ultra-compact IoT sensor modules. The package features 30 GPIOs (31 I/Os total, including dedicated RF pins), 28 with wake-up capability, and 31 5 V-tolerant I/Os.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO / VDD12O / VDD12I | Digital power domains | VDDIO (1.7–3.6 V) powers I/O ring; VDD12O (always-on 1.2 V) supplies RTC/IWDG; VDD12I (interruptible 1.2 V) powers CPU/RAM during active mode. |
| RF_P / RF_N | Differential RF interface | Connects directly to integrated balun; requires impedance-matched 50 Ω single-ended antenna via IPD (MLPF-NRG-01D3). |
| PA0–PA15, PB0–PB11 | General-purpose I/O | 28 pins support wake-up from DEEPSTOP; 31 pins are 5 V tolerant-enables direct interfacing with legacy 5 V peripherals. |
| LSE_IN / LSE_OUT | 32 kHz crystal oscillator | Drives RTC and BLE wake-up timer in DEEPSTOP mode with ±20 ppm stability; eliminates need for external timing IC. |
| SWDIO / SWCLK | Serial Wire Debug | Enables in-circuit programming and real-time debugging without JTAG overhead; supports 4 breakpoints and 2 watchpoints. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power DEEPSTOP | 0.9 µA (internal LSI) or 0.6 µA (external LSE) at 1.8 V-enables 10-year battery life in coin-cell-powered environmental sensors. |
| Hardware-accelerated BLE stack | BlueNRG core coprocessor offloads PHY/MAC/LL timing-critical operations, freeing Cortex-M0+ for application logic and reducing latency by 40% vs software-only stacks. |
| Integrated SMPS regulator | Programmable 1.2–1.9 V output improves system efficiency by 35% vs LDO-only solutions at 3.3 V input, critical for energy-harvesting designs. |
| Secure boot & memory protection | Flash read/write protection, SWD disable, and MPU with 8 configurable regions prevent unauthorized firmware access and task memory corruption in certified medical firmware. |
| Multi-protocol RF driver | 2.4 GHz proprietary mode enables <100 µs latency for industrial motion control, bypassing BLE protocol overhead while reusing same RF front-end. |
Applications
| Industrial Sensor Node | Wireless Medical Patch |
|---|---|
Use Scenario: Wireless temperature/humidity/pressure monitoring in HVAC ducts and factory machinery. IC Role / Device Role / Timing Role: Standalone BLE SoC running sensor fusion algorithm and BLE peripheral stack; RTC triggers periodic measurements every 5 seconds. Use Value: -104 dBm sensitivity ensures reliable 300 m indoor range through metal enclosures; DEEPSTOP current <1 µA extends AA battery life to 7 years. | Use Scenario: ECG/SpO₂ patch transmitting biometric data to smartphone or gateway. IC Role / Device Role / Timing Role: Network processor handling BLE GATT server and secure OTA updates; hardware AES-128 encrypts patient data before transmission. Use Value: Integrated PDM interface directly connects digital microphone; 64-bit UID enables device-level authentication per HIPAA requirements. |
| Smart Lighting Controller | Asset Tracking Tag |
Use Scenario: Mesh-enabled LED driver controlling color temperature and brightness via Bluetooth Mesh. IC Role / Device Role / Timing Role: BLE Mesh node executing proxy, relay, and friend functions; Coded PHY extends coverage across multi-story buildings. Use Value: Simultaneous connection support (128 links) enables centralized control of 50+ luminaires; GATT caching reduces broadcast traffic by 60%. | Use Scenario: Battery-powered pallet tag reporting location, shock, and temperature in cold-chain logistics. IC Role / Device Role / Timing Role: BLE beacon with periodic advertising sync transfer to mesh gateways; internal temperature sensor monitors payload integrity. Use Value: +8 dBm TX power and Coded PHY achieve 500 m open-field range; SHUTDOWN mode draws only 10 nA for 5-year shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth Low Energy SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nordic nRF52840 | ARM Cortex-M4F core, 1 MB flash, no integrated SMPS; RX sensitivity -96 dBm @ 1 Mbps. | Better for compute-intensive audio processing; lacks Coded PHY long-range support and integrated DC-DC. | Select when floating-point math or larger code footprint is required; avoid for ultra-low-power mesh nodes needing >1 km range. |
| Texas Instruments CC2642R | ARM Cortex-M4F, 352 KB flash, integrated RF matching; RX sensitivity -101 dBm @ 125 kbps. | Stronger analog peripherals (14-bit ADC); no hardware PKA for ECDH acceleration. | Prefer for analog-heavy sensor hubs; BLUENRG-355MT offers superior security acceleration for regulated healthcare deployments. |
Compared with nRF52840 and CC2642R, BLUENRG-355MT uniquely combines Coded PHY long-range, integrated SMPS, and hardware PKA in a WLCSP49 package-making it optimal for space-constrained, battery-critical, and security-regulated applications where range, efficiency, and cryptographic agility are non-negotiable.
Availability
BLUENRG-355MT is available at Aetrix Electronics and suitable for industrial sensor nodes, wireless medical patches, smart lighting controllers, and asset tracking tags requiring stable component supply across multi-year production cycles.
Supply support for BLUENRG-355MT 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 management ICs, and MEMS sensors for industrial, automotive, and consumer markets.
The BlueNRG-LP product line targets ultra-low-power wireless applications demanding Bluetooth 5.2 compliance, long battery life, and hardware-enforced security-specifically engineered for medical wearables, industrial IoT edge nodes, and smart building systems.
FAQ
What is the maximum number of simultaneous BLE connections supported by BLUENRG-355MT?
The BLUENRG-355MT supports up to 128 physical connections in concurrent master/slave roles. This is enabled by hardware-accelerated link layer management in the BlueNRG core coprocessor, allowing scalable mesh networks and multi-peripheral gateways without host CPU intervention. Connection count is configurable via firmware to balance memory usage and throughput.
Does BLUENRG-355MT require an external balun or IPD for antenna matching?
Yes-BLUENRG-355MT integrates an internal balun but requires an external IPD (e.g., MLPF-NRG-01D3) for optimal 50 Ω impedance matching and harmonic filtering. The WLCSP49 package exposes differential RF_P/RF_N pins; omitting the IPD degrades TX efficiency by >3 dB and increases EMI emissions beyond FCC/ETSI limits.
How does the integrated SMPS improve power efficiency compared to using an external LDO?
The on-chip SMPS achieves >85% conversion efficiency at 3.3 V input, reducing active-mode current by 35% versus a typical LDO. In DEEPSTOP mode, it shuts down automatically while LPREG maintains 1.0 V to VDD12O-enabling 0.6 µA total system current. External LDOs cannot match this dynamic regulation granularity or integration level.
Can BLUENRG-355MT operate as a standalone application processor without an external host MCU?
Yes-the BLUENRG-355MT runs full BLE host stack and application firmware on its Cortex-M0+ core. Its 256 KB flash and 64 KB RAM support complex sensor fusion, OTA updates, and secure boot without external memory. ST provides validated BLE stack libraries (BlueNRG Stack v4.x) and middleware for immediate standalone deployment.
BLUENRG-355MT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- BlueNRG
- Package/Case:
- 48-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v5.1
- Modulation:
- GFSK
- Frequency:
- 2.4GHz ~ 2.4835GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 8dBm
- Sensitivity:
- -97dBm
- Memory Size:
- 256kB Flash, 64kB RAM
- Serial Interfaces:
- I2C, SPI
- GPIO:
- 32
- Voltage - Supply:
- 1.7V ~ 3.6V
- Current - Receiving:
- 3.4mA
- Current - Transmitting:
- 4.3mA
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-QFN (6x6)
BLUENRG-355MT FAQ
1.How can I place an order for BLUENRG-355MT through Aetrix?
Please submit a Request for Quotation (RFQ) for BLUENRG-355MT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BLUENRG-355MT reliable?
The price and inventory of BLUENRG-355MT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BLUENRG-355MT is usually 5 days.
3.What payment methods are accepted for BLUENRG-355MT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BLUENRG-355MT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BLUENRG-355MT?
BLUENRG-355MT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BLUENRG-355MT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BLUENRG-355MT?
For technical support, including BLUENRG-355MT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BLUENRG-355MT requirements.
6.How does Aetrix verify that BLUENRG-355MT is sourced from the original manufacturer or authorized distributors?
All BLUENRG-355MT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BLUENRG-355MT meets industry standards.
7.What is the process for return or replacement of BLUENRG-355MT?
All BLUENRG-355MT units undergo pre-shipment inspection (PSI). If there is an issue with BLUENRG-355MT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BLUENRG-355MT part is unused and in its original packaging.
Return procedure for BLUENRG-355MT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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