STM32L431CBU6 STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STM32L431CBU6 is an ultra-low-power 32-bit ARM Cortex-M4 MCU with FPU, 256 KB Flash, 64 KB SRAM, and 80 MHz clock in UFQFPN-48 package. From $4.50 in stock worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 49
- Lifecycle
- ACTIVE
- Datasheet
- STM32L431CBU6 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.9850(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STM32L431CBU6?
- Ultra-low-power Cortex-M4 with FPU at up to 80 MHz delivering 100 DMIPS for energy-efficient embedded processing
- 256 KB Flash and 64 KB SRAM with Stop 2 mode current under 1 µA for long-life IoT and wearable devices
- Integrated 12-bit ADC, DAC, op-amp, and comparator in a compact UFQFPN-48 package for analog signal chain consolidation
What is STM32L431CBU6 used for?
STM32L431CBU6 excels in battery-powered IoT edge nodes, industrial sensor hubs, and personal health monitors where energy efficiency is paramount. Its ultra-low-power Stop 2 mode with RTC active enables coin-cell designs with multi-year lifetimes while its 80 MHz Cortex-M4 with FPU handles DSP workloads between sleep intervals. The integrated analog peripherals including 12-bit ADC and DAC make it suitable for wearable biometric sensors and smart building controls.
What are the specifications of STM32L431CBU6?
| Manufacturer Package Code | UFQFPN 48 7x7x0.55 |
| YTEOL | 9 |
| Has ADC | YES |
| Bit Size | 32 |
| Boundary Scan | YES |
| CPU Family | CORTEX-M4 |
| Clock Frequency-Max | 48MHz |
| DAC Channels | YES |
| DMA Channels | YES |
| Format | FLOATING POINT |
| Integrated Cache | YES |
| JESD-30 Code | S-PQCC-N48 |
| Low Power Mode | YES |
| Number of DMA Channels | 14 |
| Number of External Interrupts | 16 |
| Number of I/O Lines | 38 |
| Number of Serial I/Os | 5 |
| Number of Timers | 9 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC48,.27SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| RAM (bytes) | 65536 |
| ROM (words) | 131072 |
| ROM Programmability | FLASH |
| Speed | 80MHz |
| Supply Current-Max | 9.8mA |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 1.71V |
| Supply Voltage-Nom | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.25 |
| Country of Origin | Mainland China, Taiwan |
Where can I find the STM32L431CBU6 datasheet?
STM32L431CBU6 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STM32L431CBU6?
Compatible alternatives and drop-in replacements for STM32L431CBU6:
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M4 CPU, 80MHz, CMOS, PQCC48
Frequently Asked Questions
What is the STM32L431CBU6 standby current and how does it extend battery life in IoT nodes?
The STM32L431CBU6 achieves under 1 µA in Stop 2 mode with RTC active, enabling a coin-cell CR2032 (240 mAh) powered node to remain in low-power state for over 27 years theoretically. In practice, with periodic 80 MHz wake-ups for 10 ms sensor reads at 10 µA average active current, total system lifetime exceeds 5 years on a single coin cell.
How does the integrated FPU in the STM32L431CBU6 benefit sensor data processing compared to non-FPU MCUs?
The ARM Cortex-M4 FPU in the STM32L431CBU6 executes single-precision floating-point operations in 1 cycle versus 20 to 100 cycles on a Cortex-M0+ without FPU. For a motion sensor fusing 3-axis accelerometer and gyroscope data at 100 Hz, this reduces filter computation time from approximately 2 ms to under 0.2 ms, freeing the core for sleep at 80 MHz clock speed.
For a compact wearable design, how does the STM32L431CBU6 UFQFPN-48 package simplify PCB layout?
The UFQFPN-48 package measures only 7 mm x 7 mm x 0.55 mm, providing 48 pins including GPIOs, SPI, I2C, UART, and ADC inputs within a footprint under 50 mm². This allows wearable PCBs with 64 KB SRAM and 256 KB Flash to fit in watchband-width layouts without external memory chips, significantly reducing overall board area versus larger LQFP alternatives.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.9000 | $3.90 |
| 3+ | $1.9850 | $5.96 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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