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STMicroelectronics BLUENRG-345VT
- Part No.:
- BLUENRG-345VT
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 49-XFBGA, WLCSP
- Datasheet:
-
BLUENRG-345VT.pdf
- Description:
- IC RF TXRX+MCU BLE 49WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
BLUENRG-345VT 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 and industrial edge nodes requiring long-range, low-latency wireless telemetry.
For engineers reviewing the BLUENRG-345VT datasheet, BLUENRG-345VT pinout, BLUENRG-345VT application, or BLUENRG-345VT equivalent, key selection criteria include its WLCSP49 package footprint, DEEPSTOP mode current (0.9 µA with LSI), integrated SMPS regulator, hardware AES-128/PKA security accelerators, and support for Bluetooth Mesh networking.
Technical Context
The BLUENRG-345VT implements a dual-processor architecture: the Cortex-M0+ handles application logic and non-time-critical BLE stack layers, while the BlueNRG core coprocessor-DMA-based and timing-dedicated-manages real-time radio scheduling, packet assembly, and PHY-layer operations. This partitioning enables deterministic latency for advertising, connection events, and periodic sync transfers.
Its RF subsystem uses a low-IF receiver with AGC and direct-modulation TX, integrated balun, and supports Coded PHY (S=8) for extended range. The chip includes three power domains (VDD33, VDD12o, VDD12i), enabling selective shutdown of digital blocks during DEEPSTOP while retaining SRAM0 and RTC functionality using only 0.9 µA at 1.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BLE Version | Bluetooth 5.2 compliant: enables LE L2CAP CoC, GATT caching, and Periodic Advertising Sync Transfer for scalable mesh deployments. |
| RX Sensitivity | -104 dBm @ 125 kbps (Coded PHY S=8): extends outdoor range to >1 km in line-of-sight industrial monitoring. |
| TX Output Power | Programmable up to +8 dBm at antenna connector: allows link budget tuning without external PA for compact sensor nodes. |
| Core MCU | Arm Cortex-M0+, 64 MHz max: delivers 18 µA/MHz efficiency and supports real-time RTOS tasks alongside BLE stack. |
| Memory | 256 KB flash / 64 KB SRAM (4×16 KB banks): enables field-upgradable firmware and multi-context BLE peripheral operation. |
| Security Hardware | AES-128 co-processor, PKA, RNG, 64-bit UID: provides certified cryptographic primitives for FIPS-compliant device onboarding. |
| Operating Temp | -40 °C to +105 °C: qualified for under-hood automotive telematics and factory-floor gateways without derating. |
Pinout & Package
BLUENRG-345VT is housed in a WLCSP49 (3.140 × 3.140 mm) package with 0.4 mm pitch, optimized for space-constrained wearables and implantable-grade modules. The package features exposed RF ground pads (VSSRF) requiring direct connection to PCB ground plane per STMicroelectronics layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO / VDD | Digital I/O supply | 1.7–3.6 V input; powers GPIOs, UART, SPI, and internal regulators - must be decoupled with 100 nF near package. |
| VSSRF | RF ground reference | Dedicated RF ground pins; must connect directly to solid ground plane to maintain -104 dBm sensitivity and EMI compliance. |
| ANT | Single-ended RF antenna interface | 50 Ω nominal impedance; integrates balun - no external matching required unless using external PA. |
| PA4–PA11 | DEEPSTOP wake-up I/Os | 8 GPIOs retain output capability in DEEPSTOP (static level, LSE, or RTC output); enable ultra-low-power sensor polling. |
| SWDIO / SWCLK | Serial Wire Debug interface | 2-pin debug port supporting full SWD protocol; enables in-system programming and real-time trace without halting BLE operation. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-accelerated BLE timing | BlueNRG core coprocessor offloads all time-critical BLE PHY/MAC operations, freeing Cortex-M0+ for application logic with <1 µs jitter. |
| Multi-role concurrent connectivity | Supports simultaneous master/slave/observer roles - enables single-chip BLE gateway bridging sensor networks to cloud via LPUART/USART. |
| Configurable power domains | VDD12i shutdown in DEEPSTOP reduces active logic leakage; VDD12o remains at 1.0 V to sustain RTC and SRAM0 retention at 0.9 µA. |
| Integrated SMPS regulator | Step-down converter (1.2–1.9 V output) improves efficiency above 2.4 V supply - cuts average current by 35% vs. LDO-only in coin-cell applications. |
| Hardware security engine | PKA accelerates ECDH key exchange in <15 ms; AES-128 encrypts OTA updates in 12 cycles/byte - meets PSA Level 2 certification requirements. |
Applications
| Industrial Sensor Node | Wireless Medical Patch |
|---|---|
Use Scenario: Battery-powered vibration/temperature sensor mounted on rotating machinery in predictive maintenance systems. IC Role / Device Role / Timing Role: Standalone BLE SoC running custom firmware and BLE stack; manages sensor data acquisition, local FFT preprocessing, and periodic advertising with Coded PHY. Use Value: -104 dBm sensitivity and 128 connection capacity allow one gateway to aggregate >50 nodes across a 200 m factory floor without repeaters. | Use Scenario: Disposable ECG patch transmitting continuous biometric data to smartphone or hub for arrhythmia detection. IC Role / Device Role / Timing Role: Network processor with secure bootloader; handles BLE encryption, battery monitoring ADC, and PDM microphone interface for voice alerts. Use Value: 0.9 µA DEEPSTOP current (with LSI) extends CR2032 life to 18 months; hardware RNG ensures cryptographically secure pairing keys. |
| Smart Lighting Controller | Assisted Living Beacon |
Use Scenario: DALI-to-BLE bridge controlling LED drivers in commercial buildings with occupancy and daylight harvesting. IC Role / Device Role / Timing Role: Dual-role BLE device acting as both mesh node and central - receives DALI commands via USART and relays via Bluetooth Mesh. Use Value: Simultaneous GATT caching and periodic advertising sync transfer reduce mesh provisioning time by 60% vs. legacy BLE SoCs. | Use Scenario: Wearable fall-detection beacon worn by elderly users, triggering emergency alert via BLE to gateway when motion anomaly detected. IC Role / Device Role / Timing Role: Ultra-low-power sensor hub with quadrature decoder (for tilt sensing), 12-bit ADC (battery voltage), and LPUART (to companion MCU). Use Value: Wake-on-GPIO from accelerometer + DEEPSTOP retention enables sub-1 µA average system current - critical for 3-year button-cell operation. |
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 (no Coded PHY) | Higher compute throughput but larger power envelope; lacks long-range PHY and hardware PKA | Prefer for complex edge AI inference; avoid where Coded PHY range or sub-1 µA DEEPSTOP is mandatory |
| Texas Instruments CC2642R | ARM Cortex-M4F, 352 KB flash, integrated RF matching; RX sensitivity -101 dBm @ 125 kbps (S=8) | Similar long-range performance but higher DEEPSTOP current (1.2 µA); no hardware PKA or OTP memory | Acceptable for cost-sensitive lighting controls; not suitable for PSA-certified medical devices requiring PKA/RNG |
Compared with nRF52840 and CC2642R, BLUENRG-345VT uniquely combines Coded PHY S=8 sensitivity (-104 dBm), hardware PKA/AES, and 0.9 µA DEEPSTOP current - making it optimal for certified, battery-lifetime-critical BLE endpoints in healthcare and industrial IoT.
Availability
BLUENRG-345VT is available at Aetrix Electronics and suitable for industrial sensor nodes, wireless medical patches, smart lighting controllers, and assisted living beacons requiring stable component supply across multi-year production cycles.
Supply support for BLUENRG-345VT 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, designing and manufacturing microcontrollers, analog ICs, MEMS, and power solutions for industrial, automotive, and consumer markets.
The BlueNRG-LP product line targets ultra-low-power wireless edge nodes, emphasizing certified security, Bluetooth Mesh readiness, and sub-1 µA deep-sleep operation for multi-year battery life in unattended deployments.
FAQ
What is the maximum number of simultaneous BLE connections supported by BLUENRG-345VT?
The BLUENRG-345VT supports up to 128 physical BLE connections in concurrent master/slave/observer roles. This is enabled by hardware-accelerated connection management in the BlueNRG core coprocessor, allowing scalable mesh network formation without host CPU intervention. Connection count is configurable via firmware and depends on memory allocation for connection contexts.
Does BLUENRG-345VT require external RF matching components when using the ANT pin?
No external matching components are required when using the ANT pin in standard configurations. The BLUENRG-345VT integrates an on-die balun and supports direct 50 Ω single-ended antenna connection. STMicroelectronics recommends using the MLPF-NRG-01D3 IPD companion chip only when optimizing for EMI suppression or when driving an external PA - otherwise, the integrated front-end meets ETSI EN 300 328 and FCC Part 15 requirements out-of-box.
How does the SMPS regulator affect power efficiency in battery-powered designs?
The integrated SMPS step-down converter reduces average system current by up to 35% compared to LDO-only operation when VDDIO exceeds 2.4 V. It dynamically switches between 4 MHz and 8 MHz switching frequencies and supports programmable output (1.2–1.9 V) to match core voltage needs. In coin-cell applications, this extends runtime significantly - e.g., from 12 to 18 months in a DEEPSTOP-dominated sensor node.
Can BLUENRG-345VT operate in Bluetooth Mesh networks, and what firmware support is required?
Yes, BLUENRG-345VT fully supports Bluetooth Mesh v1.1 through ST's certified BlueNRG-Mesh SDK. The chip's hardware GATT caching, periodic advertising sync transfer, and 128-connection capacity enable robust proxy, relay, and node functionality. Mesh stack execution requires ≥128 KB flash and ≥32 KB RAM - both satisfied by the 256 KB flash and 64 KB SRAM configuration of BLUENRG-345VT.
BLUENRG-345VT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- BlueNRG
- Package/Case:
- 49-XFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v5.2
- Modulation:
- GFSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 8dBm
- Sensitivity:
- -104dBm
- Memory Size:
- 256kB Flash, 32kB RAM
- Serial Interfaces:
- I2C, I2S, JTAG, PCM, PWM, SPI, USART
- GPIO:
- 30
- Voltage - Supply:
- 1.7V ~ 3.6V
- Current - Receiving:
- 3.4mA
- Current - Transmitting:
- 4.3mA
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 49-WLCSP (3.14x3.14)
BLUENRG-345VT FAQ
1.How can I place an order for BLUENRG-345VT through Aetrix?
Please submit a Request for Quotation (RFQ) for BLUENRG-345VT 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-345VT reliable?
The price and inventory of BLUENRG-345VT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BLUENRG-345VT is usually 5 days.
3.What payment methods are accepted for BLUENRG-345VT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BLUENRG-345VT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BLUENRG-345VT?
BLUENRG-345VT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BLUENRG-345VT 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-345VT?
For technical support, including BLUENRG-345VT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BLUENRG-345VT requirements.
6.How does Aetrix verify that BLUENRG-345VT is sourced from the original manufacturer or authorized distributors?
All BLUENRG-345VT 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-345VT meets industry standards.
7.What is the process for return or replacement of BLUENRG-345VT?
All BLUENRG-345VT units undergo pre-shipment inspection (PSI). If there is an issue with BLUENRG-345VT, 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-345VT part is unused and in its original packaging.
Return procedure for BLUENRG-345VT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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