STM32WB55CGU6U STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STMicroelectronics STM32WB55CGU6U is an ultra-low-power dual-core wireless SoC with an ARM Cortex-M4 at 64 MHz and a Cortex-M0+ for Bluetooth 5.0 and IEEE 802.15.4, in a 49-pin UFQFPN package. It integrates 1 MB Flash, 256 KB SRAM, and an integrated RF transceiver supporting BLE and Zigbee. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 49
- Lifecycle
- ACTIVE
- Datasheet
- STM32WB55CGU6U Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STM32WB55CGU6U?
- Dual-core ARM Cortex-M4 at 64 MHz + Cortex-M0+ co-processor for concurrent application and wireless stack execution
- Integrated multi-protocol RF with Bluetooth 5.0 and IEEE 802.15.4 (Zigbee/Thread) in a single chip
- Ultra-low-power modes with 1 MB Flash and 256 KB SRAM in a compact 49-pin UFQFPN package
What is STM32WB55CGU6U used for?
The STM32WB55CGU6U targets connected IoT devices such as smart home sensors, wearable health monitors, and building automation nodes that require simultaneous Bluetooth 5.0 and Zigbee connectivity. Its dual-core architecture lets the M0+ manage the wireless protocol stack independently, freeing the M4 application core for sensor fusion and user-interface tasks. The device is also used in asset trackers and industrial wireless mesh networks where multi-protocol flexibility in a 7 mm x 7 mm footprint is essential.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the STM32WB55CGU6U datasheet?
STM32WB55CGU6U Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STM32WB55CGU6U?
Compatible alternatives and drop-in replacements for STM32WB55CGU6U:
Frequently Asked Questions
How does the dual-core architecture of STM32WB55CGU6U benefit real-time wireless applications?
The STM32WB55CGU6U pairs a 64 MHz Cortex-M4 application core with a dedicated Cortex-M0+ wireless co-processor. The M0+ runs the BLE or Zigbee stack independently, so the M4 is never interrupted by protocol timing tasks. This separation guarantees deterministic latency under 1 ms for application-level responses while maintaining IEEE 802.15.4 packet timing requirements.
Which wireless standards does the STM32WB55CGU6U support, and can it run them concurrently?
The STM32WB55CGU6U supports Bluetooth 5.0 Low Energy and IEEE 802.15.4 (used by Zigbee and Thread). ST's wireless firmware stacks can be combined to run BLE and Zigbee concurrently through time-multiplexing, allowing a single chip to bridge a BLE mobile app at 2 Mbps and a Zigbee mesh at 250 kbps simultaneously without external RF components.
What memory resources does the STM32WB55CGU6U provide for firmware and data buffering?
The device includes 1 MB of internal Flash for program storage and 256 KB of SRAM split between the application core and the wireless co-processor. This allocation supports complex BLE GATT profiles, over-the-air firmware update buffers, and application data in a single package, eliminating the need for external NOR Flash in most sensor and wearable designs.
Is the STM32WB55CGU6U suitable for a compact wearable PCB, and what package does it use?
Yes. The STM32WB55CGU6U is housed in a 49-pin UFQFPN package measuring 7 mm x 7 mm with a 0.5 mm pitch, which is among the smallest footprints for a dual-core wireless SoC with integrated 1 MB Flash. This makes it an excellent fit for wristworn health monitors and clip-on industrial badges where the total PCB area is limited to a few square centimeters.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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