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STMicroelectronics BLUENRG-355AT
- Part No.:
- BLUENRG-355AT
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
BLUENRG-355AT.pdf
- Description:
- IC RF TXRX+MCU BLE 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
BLUENRG-355AT from STMicroelectronics is a Bluetooth® 5.2-certified ultra-low-power wireless SoC 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 simultaneous BLE roles in industrial sensor nodes and medical wearables.
For engineers reviewing the BLUENRG-355AT datasheet, BLUENRG-355AT pinout, BLUENRG-355AT application, or BLUENRG-355AT equivalent, key selection criteria include its DEEPSTOP mode current (0.6 µA with external LSE), integrated SMPS regulator, hardware AES-128/PKA security accelerators, and QFN32 package compatibility with IPD companion MLPF-NRG-01D3.
Technical Context
The BLUENRG-355AT 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 including Coded PHY and LE Power Control.
Its RF subsystem uses a low-IF receiver with AGC and direct-modulation transmitter with programmable LDO-controlled PA biasing, enabling precise output power tuning from -20 to +8 dBm. The integrated balun and support for external PA allow flexible antenna interface design compliant with ETSI EN 300 328, FCC Part 15, and ARIB STD-T66.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BLE Version | Bluetooth 5.2: enables long-range (Coded PHY), periodic advertising sync transfer, and GATT caching for reduced connection latency in mesh networks. |
| RX Sensitivity | -104 dBm @ 125 kbps: ensures reliable reception in noisy industrial environments with extended range up to 1 km line-of-sight. |
| TX Output Power | +8 dBm (programmable): allows optimization of link budget without external PA in compact PCB layouts. |
| Ultra-Low Power Modes | 0.6 µA DEEPSTOP (LSE + BLE wake-up): enables multi-year battery life in coin-cell-powered sensors with scheduled BLE advertising. |
| Memory | 256 KB flash / 64 KB SRAM: sufficient for full BLE stack + application firmware with OTA update capability and secure bootloader storage. |
| Security Hardware | AES-128 co-processor + PKA + RNG + 64-bit UID: provides certified cryptographic acceleration for secure pairing, firmware signing, and device identity binding. |
| Operating Voltage | 1.7–3.6 V: supports direct Li-ion/Li-Po or two-AA battery operation without external regulators. |
| Temperature Range | -40 °C to +105 °C: qualified for under-hood automotive sensors, industrial gateways, and HVAC controllers. |
Pinout & Package
BLUENRG-355AT is housed in a VFQFPN32 (5 × 5 mm) package with 32-pin layout, exposing 20 GPIOs (including 18 with wake-up capability), dedicated RF I/O (RF_IN/RF_OUT), integrated balun connections, and separate analog/digital ground pins (VSSRF/VSS) requiring direct connection to PCB ground plane per STMicroelectronics layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO / VDD | Digital power supply | 1.7–3.6 V main supply; powers I/O ring, peripherals, and SMPS input; must be decoupled with 100 nF + 1 µF near pin. |
| VSS / VSSRF | Analog & digital ground | Separate ground returns required: VSSRF connects directly to RF ground plane; VSS ties to digital ground with low-inductance path. |
| RF_IN / RF_OUT | Differential RF interface | Connects to internal balun; RF_OUT drives 50 Ω antenna; RF_IN receives from antenna; no external matching needed when using integrated balun. |
| PA4–PA11 | DEEPSTOP wake-up I/Os | Eight GPIOs retain wake-up capability in DEEPSTOP mode; configurable as RTC output, LSE clock, or static level for peripheral control during sleep. |
| BOOT0 | Boot mode select | Pulled low for normal operation; pulled high to enter UART bootloader mode for firmware recovery or field updates. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-core execution model | Cortex-M0+ + BlueNRG coprocessor enables concurrent application processing and deterministic BLE timing-no software stack arbitration needed. |
| Hardware-accelerated security | Dedicated AES-128, PKA (ECDH), and TRNG eliminate CPU overhead for secure key exchange and encrypted OTA updates. |
| Integrated SMPS regulator | Configurable 1.2–1.9 V output reduces active-mode current by ~30% vs. LDO-only supply at 3.3 V, extending battery life in always-on sensing nodes. |
| Multi-role BLE concurrency | Supports simultaneous central/peripheral/broadcaster roles-enables single-chip BLE gateway bridging sensor networks to cloud infrastructure. |
| Industrial-grade memory retention | SRAM0 retained in DEEPSTOP; optional retention of SRAM1–SRAM3 allows fast context restore without full reboot after wake-up events. |
Applications
| Industrial Sensor Node | Wireless Medical Patch |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor deployed in factory-floor machinery monitoring. IC Role / Device Role / Timing Role: Standalone BLE peripheral with periodic advertising, local data logging, and wake-on-RF event handling. Use Value: 0.6 µA DEEPSTOP current enables >5-year operation on CR2032; Coded PHY extends coverage across metal-rich environments. | Use Scenario: Disposable ECG patch transmitting biometric data to smartphone or hub. IC Role / Device Role / Timing Role: Secure BLE peripheral with encrypted PDM microphone interface and battery voltage monitoring. Use Value: Integrated 12-bit ADC with decimation filter achieves 16-bit effective resolution for analog biosignal acquisition; AES-128 ensures HIPAA-compliant data transport. |
| Smart Lighting Controller | Asset Tracking Tag |
Use Scenario: Zigbee-to-BLE bridge controlling LED drivers via DALI interface in commercial buildings. IC Role / Device Role / Timing Role: BLE network processor with UART host interface, managing multiple light group advertisements and OTA updates. Use Value: 256 KB flash stores dual BLE stack images for seamless firmware rollback; LPUART supports DALI physical layer timing compliance. | Use Scenario: GPS-denied indoor logistics tag reporting location via BLE proximity beacons. IC Role / Device Role / Timing Role: BLE broadcaster with periodic advertising sync transfer to fixed-location gateways. Use Value: +8 dBm TX power and -104 dBm RX sensitivity maximize beacon detection range in warehouse multipath environments; 105 °C rating ensures reliability near HVAC ducts. |
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 |
|---|---|---|---|
| nRF52840 DK | Higher peak TX power (+9 dBm), larger flash (1 MB), but higher DEEPSTOP current (1.5 µA) and no integrated SMPS. | Better suited for USB-powered hubs or complex mesh routers requiring large OTA payloads. | Select when >500 KB application code size or USB connectivity is required; avoid for coin-cell lifetime-critical designs. |
| CC2642R1F | Same BLE 5.2 feature set, lower RX sensitivity (-102 dBm @ 125 kbps), includes integrated DC/DC but no PKA accelerator. | Preferred for TI ecosystem integration (SimpleLink SDK) and sub-GHz coexistence in multi-band IoT gateways. | Choose if leveraging TI's BLE stack certification services or needing concurrent 2.4 GHz + sub-GHz operation. |
Compared with nRF52840 DK and CC2642R1F, BLUENRG-355AT offers the lowest DEEPSTOP current (0.6 µA), integrated SMPS for efficiency across 1.7–3.6 V, and hardware PKA for ECDH-making it optimal for long-life, security-sensitive, battery-constrained edge nodes where minimal BOM count is critical.
Availability
BLUENRG-355AT 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-355AT 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, power management ICs, sensors, and wireless SoCs for industrial, automotive, and consumer markets.
The BlueNRG-LP product line targets ultra-low-power wireless edge devices requiring Bluetooth 5.2 features, hardware security, and extended battery life-designed specifically for industrial automation, medical wearables, and smart building systems.
FAQ
What is the minimum external crystal requirement for BLUENRG-355AT?
The BLUENRG-355AT requires a 32 MHz ±20 ppm crystal for the HSE oscillator and a 32.768 kHz ±20 ppm crystal for the LSE oscillator. Both crystals must be placed within 5 mm of their respective pins with tight ground shielding and matched trace lengths to meet Bluetooth SIG timing accuracy requirements for advertising and connection intervals.
Does BLUENRG-355AT support over-the-air (OTA) firmware updates?
Yes, BLUENRG-355AT supports secure OTA updates via its embedded UART bootloader and dual-bank flash architecture. The bootloader validates firmware signatures using the hardware AES-128 and PKA engines before writing to the active bank, ensuring authenticated and tamper-resistant field upgrades without external debug interfaces.
Can BLUENRG-355AT operate without an external PA in long-range applications?
Yes-the integrated balun and +8 dBm programmable TX output enable direct connection to a 50 Ω PCB antenna for Coded PHY long-range operation up to 1 km line-of-sight. External PA is optional and only recommended when >+8 dBm is required for extreme range or metallic enclosure penetration.
How many simultaneous BLE connections does BLUENRG-355AT support?
The BLUENRG-355AT supports up to 128 physical connections in master/slave configurations, with hardware-assisted connection management allowing concurrent roles (e.g., acting as both peripheral and central). Connection count is limited by available RAM allocation and stack configuration-not by hardware PHY constraints.
BLUENRG-355AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- BlueNRG
- Package/Case:
- 32-VFQFN Exposed Pad
- 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 ~ 2.4835GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 8dBm
- Sensitivity:
- -97dBm
- Memory Size:
- 256kB Flash, 64kB RAM
- Serial Interfaces:
- ADC, GPIO, I2C, I2S, PDM, SPI, USART
- GPIO:
- 32
- 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:
- 32-QFN (5x5)
BLUENRG-355AT FAQ
1.How can I place an order for BLUENRG-355AT through Aetrix?
Please submit a Request for Quotation (RFQ) for BLUENRG-355AT 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-355AT reliable?
The price and inventory of BLUENRG-355AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BLUENRG-355AT is usually 5 days.
3.What payment methods are accepted for BLUENRG-355AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BLUENRG-355AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BLUENRG-355AT?
BLUENRG-355AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BLUENRG-355AT 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-355AT?
For technical support, including BLUENRG-355AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BLUENRG-355AT requirements.
6.How does Aetrix verify that BLUENRG-355AT is sourced from the original manufacturer or authorized distributors?
All BLUENRG-355AT 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-355AT meets industry standards.
7.What is the process for return or replacement of BLUENRG-355AT?
All BLUENRG-355AT units undergo pre-shipment inspection (PSI). If there is an issue with BLUENRG-355AT, 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-355AT part is unused and in its original packaging.
Return procedure for BLUENRG-355AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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