STM32L412C8U6TR STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STM32L412C8U6TR is an ultra-low-power 32-bit Arm Cortex-M4 MCU from STMicroelectronics with FPU, running at up to 80 MHz with 64 kB Flash and 40 kB SRAM. Features DMA, ADC, and external SMPS support in a QFN-48 package targeting IoT and wearable applications. Available from stock worldwide.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 49
- Lifecycle
- ACTIVE
- Datasheet
- STM32L412C8U6TR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.8600(MOQ 2500)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low-power Arm Cortex-M4 core with FPU running at up to 80 MHz delivering 100 DMIPS with sub-microamp stop-mode current for long battery life
- 64 kB Flash and 40 kB SRAM with external SMPS interface, enabling efficient power-rail management for wearables and IoT sensor nodes
- ADC with DMA support, boundary scan, and rich peripheral set in QFN-48 package for compact embedded designs with minimal external components
Applications
STM32L412C8U6TR is targeted at IoT sensor hubs, medical wearables, and industrial wireless nodes that require a high-performance 32-bit MCU with ultra-low active and sleep currents for years of battery operation. Its Cortex-M4 core with FPU accelerates digital signal processing tasks such as FFT-based vibration analysis and sensor fusion algorithms at up to 80 MHz. The external SMPS pin simplifies power supply design by allowing an ultra-efficient switching regulator to supply the MCU core, reducing heat and extending battery runtime.
Specifications
| Factory Lead Time | 12Weeks |
| Date Of Intro | 2018-11-19 |
| YTEOL | 9 |
| Has ADC | YES |
| Bit Size | 32 |
| Boundary Scan | YES |
| CPU Family | CORTEX-M4 |
| Clock Frequency-Max | 48MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| Format | FIXED POINT |
| Integrated Cache | YES |
| JESD-30 Code | S-XQCC-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 | 3 |
| Number of Timers | 8 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC48,.27SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| RAM (bytes) | 40960 |
| ROM (words) | 65536 |
| ROM Programmability | FLASH |
| Speed | 80MHz |
| Supply Current-Max | 100mA |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for STM32L412C8U6TR:
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M4 CPU, 80MHz, CMOS, QCC48
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M4 CPU, 80MHz, CMOS, PQCC48
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M4 CPU, 80MHz, CMOS, QCC48
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M4 CPU, 80MHz, CMOS, QCC48
Frequently Asked Questions
What is the maximum clock frequency of STM32L412C8U6TR and how does the FPU benefit sensor fusion workloads?
STM32L412C8U6TR clocks at up to 80 MHz on its Cortex-M4 core, delivering 100 DMIPS throughput. The single-precision FPU executes floating-point multiply-accumulate in 1 clock cycle, accelerating sensor fusion algorithms such as Madgwick or Mahony filters that require quaternion multiplication. Without FPU this would require software emulation taking 10x to 50x more cycles, so the FPU allows complex orientation tracking at 80 MHz while leaving headroom for communication and application tasks.
How much non-volatile and working memory does STM32L412C8U6TR provide and what firmware stack does that accommodate?
STM32L412C8U6TR provides 64 kB Flash for program storage and 40 kB SRAM for data and stack. This is sufficient for a FreeRTOS-based application with multiple tasks, a BLE stack of approximately 20 kB, and application code of 20 kB, with 10 kB to 15 kB remaining for sensor drivers and buffers. The Flash is organized with write protection and read-out protection features for IP security in commercial IoT products.
For an ultra-low-power wearable design, what sleep current does STM32L412C8U6TR achieve and how is the external SMPS feature used?
STM32L412C8U6TR achieves stop-mode currents below 1 µA with all RAM retained, and shutdown currents below 30 nA when RAM contents can be sacrificed. The external SMPS pin interfaces directly to a small inductor and capacitor to implement a built-in buck converter supplying the MCU core at 1.2 V from the battery rail, achieving core supply efficiency above 90% compared to 60% for an internal LDO, extending battery life by 30% or more in continuous-wake applications.
In a QFN-48 package, how does STM32L412C8U6TR fit into a compact PCB design and what debugging interface does it support?
STM32L412C8U6TR in the UFQFPN-48 package measures 7 mm x 7 mm with 0.5 mm pin pitch, enabling a complete MCU circuit within a 1 cm x 1 cm board area using only decoupling capacitors and the optional SMPS inductor. The device supports a 2-pin SWD (Serial Wire Debug) interface for programming and real-time debugging with ST-LINK probes, requiring only SWDIO and SWDCLK lines instead of the 5-pin JTAG boundary-scan interface, saving I/O pins on space-constrained boards.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 2500+ | $1.8600 | $4650.00 |
In Stock · 24h Response · Worldwide Shipping
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“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”