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STMicroelectronics STM32W108CZU73TR
- Part No.:
- STM32W108CZU73TR
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32W108CZU73TR.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:783
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Product details
Overview
STM32W108CZU73TR 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, 256 KB Flash, 16 KB 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 building automation.
For engineers reviewing the STM32W108CZU73TR datasheet, STM32W108CZU73TR pinout, STM32W108CZU73TR application, or STM32W108CZU73TR equivalent, key selection criteria include integrated MAC layer support, deep-sleep current of 400 nA (RAM retained), 24 configurable GPIOs with Schmitt triggers, and VFQFPN48 (7 × 7 mm) package compatibility with IEEE 802.15.4 protocol stack requirements.
Technical Context
The device implements a full IEEE 802.15.4 PHY/MAC stack in hardware, with dedicated packet trace interface (PTI) and non-intrusive RF packet monitoring. Its ARM Cortex-M3 core runs at up to 24 MHz and supports Thumb®-2 instructions, nested vectored interrupt controller (NVIC), and memory protection unit (MPU) for secure firmware execution.
RF subsystem includes calibrated 2.4 GHz transceiver with configurable output power up to +8 dBm, RSSI/CCA detection, and robust coexistence against WiFi/Bluetooth interference. Power management enables multiple sleep modes - including deep sleep with 400 nA current and wake-on-GPIO - coordinated via low-frequency internal RC oscillator (LSI10K) and optional 32.768 kHz crystal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 24 MHz max operation - enables real-time ZigBee Pro stack execution with deterministic interrupt latency. |
| Wireless Standard | IEEE 802.15.4-2006 compliant PHY/MAC - supports native ZigBee Pro and RF4CE without external baseband processing. |
| Flash / RAM | 256 KB Flash / 16 KB RAM - sufficient for full ZigBee coordinator/router firmware plus application logic and OTA update buffer. |
| RF Performance | -99 dBm RX sensitivity (1% PER, 20-byte packet); +3 dBm nominal TX output - achieves 102 dB link budget for reliable 100+ m indoor mesh node range. |
| Power Consumption | 400 nA deep sleep (RAM retained); 27 mA RX current (with CPU active) - enables battery-powered sensor nodes with multi-year lifetime on coin cell. |
| Supply Voltage | 2.1–3.6 V single supply - simplifies power design with internal 1.8 V and 1.25 V regulators; eliminates need for external LDOs. |
| GPIO Count | 24 highly configurable pins with Schmitt-trigger inputs - supports direct interfacing to sensors, buttons, LEDs, and external PA control without signal conditioning. |
Pinout & Package
STM32W108CZU73TR uses a 48-pin VFQFPN package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per ST DocID16252 Rev 16, Section 3 ("Pinout and pin description").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 2.1–3.6 V main power input; powers internal 1.8 V and 1.25 V regulators for CPU, RF, and peripherals. |
| VSS | Digital ground | Reference return path for digital logic and RF baseband; requires low-inductance connection to thermal pad. |
| RF_P / RF_N | Differential RF transceiver interface | Direct 50 Ω differential connection to matching network and antenna; no external balun required. |
| OSC_IN / OSC_OUT | 24 MHz crystal oscillator terminals | Drives high-frequency clock for CPU and RF timing; supports low-ESR ceramic resonators for reduced BOM count. |
| nBOOTMODE | Boot mode selection | Pulled high during reset to enable embedded bootloader; allows firmware updates over UART or SPI without JTAG. |
| SWDIO / SWCLK | Serial Wire Debug interface | Enables non-intrusive debug, flash programming, and real-time trace via standard ARM SWD protocol. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated IEEE 802.15.4 MAC | Hardware-accelerated MAC layer reduces CPU load by >40% vs software-only implementations; enables concurrent RF and application processing. |
| AES128 encryption accelerator | Dedicated crypto engine performs AES-CTR/CCM operations in <10 µs per block - secures ZigBee network keys and OTA payloads without CPU intervention. |
| Packet Trace Interface (PTI) | Real-time, non-intrusive RF packet capture via dedicated parallel port - enables protocol-level debugging without affecting timing or power behavior. |
| Flexible low-power modes | Deep sleep with 400 nA current and RAM retention allows instant wake-up (<100 µs) from GPIO or timer events - ideal for duty-cycled sensor nodes. |
| Single-supply operation | Internal dual-regulator architecture (1.8 V core, 1.25 V RF) eliminates external voltage rails - reduces PCB area and component count by ≥3 passive parts. |
Applications
| Smart Energy Meters | Home Automation Hubs |
|---|---|
Use Scenario: Wireless communication between electricity/gas/water meters and concentrator gateways in AMI networks. IC Role / Device Role / Timing Role: IEEE 802.15.4 end-device node with embedded ZigBee Pro stack; handles secure meter reading, time-synchronized reporting, and OTA firmware updates. Use Value: 256 KB Flash stores full ZigBee SE profile and DLMS/COSEM parsing logic; 400 nA deep sleep extends battery life beyond 10 years in tamper-proof sealed units. |
Use Scenario: Central hub aggregating data from lighting, HVAC, and security sensors across residential environments. IC Role / Device Role / Timing Role: ZigBee Pro coordinator with hardware MAC and AES128 - manages network formation, routing, and secure key distribution. Use Value: 24 GPIOs directly interface with local sensors and relays; +3 dBm output ensures reliable 30+ m coverage through walls without external PA. |
| Building Automation Controllers | RF4CE Remote Controls |
Use Scenario: Wireless thermostat and occupancy sensor nodes in commercial HVAC systems requiring interoperability with BACnet/IP gateways. IC Role / Device Role / Timing Role: Low-latency end-device with fast wake-from-sleep (<100 µs) and precise 32.768 kHz timer support for scheduled reporting. Use Value: 16 KB RAM buffers sensor fusion algorithms and maintains network state during deep sleep; Schmitt-trigger GPIOs tolerate noisy industrial environments. |
Use Scenario: Ultra-low-power TV and set-top box remotes requiring sub-100 ms button response and multi-year battery life. IC Role / Device Role / Timing Role: RF4CE-compliant transmitter with optimized sleep/wake cycle; uses hardware AES for secure pairing and command encryption. Use Value: 27 mA RX current enables rapid channel scanning; 400 nA deep sleep with wake-on-button press achieves >5 year CR2032 lifetime at 10 presses/day. |
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 |
|---|---|---|---|
| TI CC2530F256 | 8051 core, 256 KB Flash, -97 dBm RX sensitivity, no hardware AES accelerator | Limited to ZigBee HA profiles; lacks RF4CE certification and deep-sleep current optimization | Prefer when legacy Z-Stack v2.x migration is required and crypto offload is handled in firmware. |
| Silicon Labs EFR32MG1P132F256GM32 | ARM Cortex-M4, 256 KB Flash, -101 dBm RX, +10 dBm TX, integrated DC-DC converter | Supports Thread/ZigBee 3.0; higher RF output enables longer range but increases BOM cost and layout complexity | Choose for new designs requiring multi-protocol support, higher link budget, or regulatory-certified modules. |
Compared with CC2530F256, STM32W108CZU73TR offers superior low-power performance (400 nA vs 1 µA deep sleep) and hardware AES; versus EFR32MG1P132, it provides lower system cost and simpler RF layout but lacks Thread compatibility and DC-DC efficiency.
Availability
STM32W108CZU73TR is available at Aetrix Electronics and suitable for smart energy metering, building automation controllers, and RF4CE remote controls requiring stable component supply and long-term lifecycle support.
Supply support for STM32W108CZU73TR 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, specializing in microcontrollers, analog ICs, and power management solutions for industrial, automotive, and IoT markets.
This device belongs to the STM32W wireless MCU product line, designed specifically for ultra-low-power, standards-compliant wireless sensor networking in resource-constrained embedded systems.
FAQ
Is STM32W108CZU73TR recommended for new designs?
No. STMicroelectronics explicitly states this part is "not recommended for new designs" as of March 2015 (DocID16252 Rev 16). It remains in production for existing program continuity but has been superseded by the STM32WB series. Customers initiating new projects should evaluate STM32WB55xx or STM32WB35xx for enhanced security, Bluetooth LE support, and extended lifecycle.
What debug interfaces does STM32W108CZU73TR support?
It supports Serial Wire Debug (SWD) via SWDIO and SWCLK pins, fully compatible with ARM CoreSight tools. The chip also features a dedicated Packet Trace Interface (PTI) for real-time, non-intrusive RF packet capture - a unique capability not available on standard SWD - enabling protocol-level validation without affecting RF timing or power consumption.
Does STM32W108CZU73TR require an external crystal for basic operation?
No. It includes a high-frequency internal RC oscillator (HSI) that enables full CPU and RF operation at 24 MHz without any external crystal. However, a 24 MHz crystal is recommended for improved RF frequency accuracy and jitter performance, while a 32.768 kHz crystal is optional for high-precision sleep timer operation.
Can STM32W108CZU73TR operate as a ZigBee coordinator?
Yes. Its integrated IEEE 802.15.4 MAC, 256 KB Flash, and 16 KB RAM provide sufficient resources to run full ZigBee Pro coordinator firmware (e.g., EmberZNet or ST's ZIGBEE-PRO stack). Hardware AES128 acceleration and PTI support ensure secure, debuggable network management in hub and gateway applications.
STM32W108CZU73TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 48-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4
- Protocol:
- -
- Modulation:
- O-QPSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 5Mbps
- Power - Output:
- 8dBm
- Sensitivity:
- -102dBm
- Memory Size:
- 192kB Flash, 12kB RAM
- Serial Interfaces:
- I2C, JTAG, SPI, UART
- GPIO:
- 24
- Voltage - Supply:
- 2.1V ~ 3.6V
- Current - Receiving:
- 22mA ~ 28.5mA
- Current - Transmitting:
- 22.5mA ~ 43.5mA
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-UFQFPN (7x7)
STM32W108CZU73TR FAQ
1.How can I place an order for STM32W108CZU73TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32W108CZU73TR 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 STM32W108CZU73TR reliable?
The price and inventory of STM32W108CZU73TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32W108CZU73TR is usually 5 days.
3.What payment methods are accepted for STM32W108CZU73TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32W108CZU73TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32W108CZU73TR?
STM32W108CZU73TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32W108CZU73TR 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 STM32W108CZU73TR?
For technical support, including STM32W108CZU73TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32W108CZU73TR requirements.
6.How does Aetrix verify that STM32W108CZU73TR is sourced from the original manufacturer or authorized distributors?
All STM32W108CZU73TR 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 STM32W108CZU73TR meets industry standards.
7.What is the process for return or replacement of STM32W108CZU73TR?
All STM32W108CZU73TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32W108CZU73TR, 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 STM32W108CZU73TR part is unused and in its original packaging.
Return procedure for STM32W108CZU73TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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