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Home > Products > RF and Wireless > RF Transceiver ICs

STMicroelectronics STM32W108CBU61TR

Name: STM32W108CBU61TR
Brand: STMicroelectronics
SKU: STM32W108CBU61TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32W108CBU61TR

Manufacturer:: STMicroelectronics

Category:: RF Transceiver ICs

Package:: 48-VFQFN Exposed Pad

Datasheet:: STM32W108CBU61TR.pdf

Description:: IC RF TXRX+MCU BLE 48VFQFPN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STM32W108CBU61TR from STMicroelectronics is a high-performance IEEE 802.15.4 wireless system-on-chip integrating a 32-bit ARM® Cortex®-M3 processor, 2.4 GHz transceiver, 128 Kbyte Flash, 8 Kbyte RAM, and AES128 encryption accelerator. It operates at 2.1–3.6 V, delivers +3 dBm RF output, and achieves -99 dBm RX sensitivity for ZigBee® Pro and RF4CE applications in smart energy and home automation.

For engineers reviewing the STM32W108CBU61TR datasheet, STM32W108CBU61TR pinout, STM32W108CBU61TR application, or STM32W108CBU61TR equivalent, this SoC supports non-intrusive packet trace, low-deep-sleep current (400 nA), configurable link budget up to 107 dB, and hardware debug via Serial Wire/JTAG - critical for wireless sensor node development and certification.

Technical Context

The device integrates a full IEEE 802.15.4 MAC layer with hardware-accelerated AES128, enabling secure frame encryption/decryption without CPU overhead. Its RF front-end includes configurable TX power (up to +8 dBm) and RX sensitivity (-100 dBm at 1% PER), with robust coexistence against WiFi/Bluetooth interference.

Power management features include dual internal oscillators (HSI at 24 MHz for fast wake-up; LSI at 10 kHz for deep sleep timing), flexible sleep modes retaining RAM and GPIO state, and integrated 1.8 V/1.25 V regulators eliminating external LDOs for single-supply operation.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	ARM Cortex-M3 @ 24 MHz - delivers deterministic real-time execution for time-critical MAC and application tasks.
RF Standard	IEEE 802.15.4-2006 - enables native ZigBee Pro and RF4CE protocol stack implementation without external baseband IC.
Memory	128 Kbyte Flash / 8 Kbyte RAM - sufficient for full ZigBee coordinator/router firmware plus user application logic.
RF Performance	-99 dBm RX sensitivity (1% PER, 20-byte packet); +3 dBm nominal TX output - supports >100 m outdoor range in mesh networks.
Power Consumption	400 nA deep sleep current with RAM retention - enables battery life >10 years in coin-cell-powered sensors.
Interface Peripherals	24 GPIOs (Schmitt-trigger inputs), SPI/I²C/UART, 3x general-purpose timers, ADC - supports sensor interfacing and host MCU bridging.
Security	Hardware AES128 accelerator - offloads encryption from CPU, reducing latency and power during secure frame transmission.

Pinout & Package

STM32W108CBU61TR is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact wireless modules and PCB space-constrained IoT endpoints.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Core & I/O supply	2.1–3.6 V input powering internal 1.8 V/1.25 V regulators; decoupling required per datasheet layout guidelines.
RF_IO	Transceiver antenna interface	Differential RF port requiring 50 Ω matching network; supports direct connection to chip antenna or external PA/LNA.
nBOOTMODE	Boot configuration control	Pulled high to boot from embedded Flash; pulled low to enter serial bootloader mode via UART.
SWDIO/SWCLK	Debug interface	Serial Wire Debug pins enabling non-intrusive JTAG/SWD programming and real-time packet trace debugging.
PA0–PA23	General-purpose I/O	24 highly configurable GPIOs with Schmitt triggers, supporting alternate functions for SPI/I²C/UART and wake-from-sleep capability.

Key Features

Feature	Design Value
Integrated IEEE 802.15.4 MAC	Hardware-implemented lower MAC layer reduces CPU load by >30% vs software MAC, improving real-time responsiveness.
Configurable RF link budget	Up to 107 dB via adjustable TX power (+3 to +8 dBm) and RX gain - enables adaptive range/power trade-offs per deployment environment.
Low-power deep sleep mode	400 nA current draw with RAM and GPIO retention - eliminates need for external RTC or backup power in battery-operated nodes.
Non-intrusive packet trace	Dedicated PTI interface captures RF frame timing, MAC events, and CPU activity without halting execution - accelerates ZigBee interoperability testing.
Single-supply operation	Internal 1.8 V and 1.25 V regulators powered from 2.1–3.6 V VDD - removes requirement for external voltage rails, simplifying BOM and layout.

Applications

Smart Energy Meters

Home Automation Sensors

Use Scenario: Wireless communication between electricity/gas meters and concentrator gateways in AMI networks.

IC Role / Device Role / Timing Role: Full-stack ZigBee Pro endpoint handling MAC layer, security, and application data framing.

Use Value: Meets ANSI C12.22 and DLMS/COSEM over ZigBee requirements with hardware AES128 and deterministic 15.4 timing.

Use Scenario: Battery-powered temperature/humidity/motion sensors reporting to hub via mesh network.

IC Role / Device Role / Timing Role: Self-contained wireless node managing RF scheduling, sleep/wake cycles, and sensor data acquisition.

Use Value: 400 nA deep sleep current extends CR2032 battery life beyond 5 years while maintaining network join capability.

Building Security Panels

RF4CE Remote Controls

Use Scenario: Wireless door/window contact sensors and panic buttons transmitting alerts to central alarm panel.

IC Role / Device Role / Timing Role: Low-latency, secure endpoint with fast wake-up (<100 µs) and encrypted payload transmission.

Use Value: HSI oscillator enables sub-100 µs CPU startup from sleep, ensuring <150 ms end-to-end alarm response time.

Use Scenario: Two-way remote controls for TVs and set-top boxes using RF4CE protocol stack.

IC Role / Device Role / Timing Role: Dual-role device acting as both RF4CE controller and target, supporting HID profile and key repeat timing.

Use Value: Integrated MAC and hardware AES enable certified RF4CE compliance without external crypto IC or timing jitter.

Equivalent & Alternatives

The following parts are listed as comparable options for similar IEEE 802.15.4 wireless SoC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CC2530F256RHAT	8051 core, 256 KB Flash, no integrated MAC acceleration; lower RF sensitivity (-97 dBm)	Requires larger software stack footprint; less suitable for dense mesh deployments with co-channel interference	Preferred where legacy 8051 toolchain familiarity outweighs performance and power advantages
JN5169-001-M00	32-bit RISC core, 512 KB Flash, ZigBee 3.0 certified, higher sleep current (1.2 µA)	Built-in ZigBee 3.0 stack support; lacks hardware AES but offers enhanced OTA update capabilities	Chosen for new ZigBee 3.0 product lines requiring long-term certification roadmap alignment

Compared with CC2530F256RHAT and JN5169-001-M00, STM32W108CBU61TR provides superior RF link budget (102 dB vs ≤97 dB), lowest deep-sleep current (400 nA vs ≥1.2 µA), and hardware MAC acceleration - making it optimal for ultra-low-power, high-reliability ZigBee Pro sensor networks despite its "not recommended for new designs" status.

Availability

STM32W108CBU61TR is available at Aetrix Electronics and suitable for smart energy metering, building security systems, and home automation sensor nodes requiring stable component supply and long-lifecycle support.

Supply support for STM32W108CBU61TR 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 solutions for industrial, automotive, and consumer markets.

The STM32W series targets low-power wireless embedded applications, combining ARM Cortex-M processing with IEEE 802.15.4 radio and security acceleration to simplify certified ZigBee and RF4CE product development.

FAQ

Is STM32W108CBU61TR still in production?

Yes, STM32W108CBU61TR remains in active production per STMicroelectronics' official product status, though it is marked "not recommended for new designs" as of March 2015. Aetrix Electronics maintains inventory and supports legacy design continuity with full traceability and extended procurement planning.

What is the maximum configurable TX output power?

The STM32W108CBU61TR supports configurable TX output power up to +8 dBm in normal mode, achieved via internal PA bias adjustment and register-controlled RF path calibration - verified in ST's AN3927 application note and production test reports.

Does it support over-the-air (OTA) firmware updates?

Yes, the device supports secure OTA updates through its integrated AES128 accelerator and dual-bank Flash architecture (with bootloader residing in protected sector), enabling authenticated, encrypted firmware image validation and atomic swap - documented in UM1455 and STSW-STM32085 reference code.

Can it operate without an external crystal?

Yes - the STM32W108CBU61TR includes a high-frequency internal RC oscillator (HSI, 24 MHz) capable of full-speed operation and fast wake-up (<100 µs). An external 24 MHz crystal is optional for improved timing accuracy in MAC timing-critical applications like beacon-enabled networks.

STM32W108CBU61TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STM32

Package/Case:: 48-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: TxRx + MCU

RF Family/Standard:: Bluetooth, WiFi

Protocol:: 802.15.4, Zigbee®

Modulation:: -

Frequency:: 2.4GHz

Data Rate (Max):: -

Power - Output:: 3dBm

Sensitivity:: -99dBm

Memory Size:: 128kB Flash

Serial Interfaces:: ADC, GPIO, I2C, SPI, UART

GPIO:: 24

Voltage - Supply:: 2.1V ~ 3.6V

Current - Receiving:: 27mA

Current - Transmitting:: 31mA

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Supplier Device Package:: 48-VFQFPN (7x7)

STM32W108CBU61TR FAQ

1.How can I place an order for STM32W108CBU61TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32W108CBU61TR 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 STM32W108CBU61TR reliable?

The price and inventory of STM32W108CBU61TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32W108CBU61TR is usually 5 days.

3.What payment methods are accepted for STM32W108CBU61TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32W108CBU61TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32W108CBU61TR?

STM32W108CBU61TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32W108CBU61TR 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 STM32W108CBU61TR?

For technical support, including STM32W108CBU61TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32W108CBU61TR requirements.

6.How does Aetrix verify that STM32W108CBU61TR is sourced from the original manufacturer or authorized distributors?

All STM32W108CBU61TR 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 STM32W108CBU61TR meets industry standards.

7.What is the process for return or replacement of STM32W108CBU61TR?

All STM32W108CBU61TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32W108CBU61TR, 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 STM32W108CBU61TR part is unused and in its original packaging.

Return procedure for STM32W108CBU61TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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