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STMicroelectronics STM32L412RBT6P
- Part No.:
- STM32L412RBT6P
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L412RBT6P.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:8,420
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Product details
Overview
STM32L412RBT6P from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 128 KB flash, 40 KB SRAM, and integrated analog peripherals including dual 12-bit ADCs (5 Msps), one operational amplifier with PGA, and one ultra-low-power comparator. It supports external SMPS for optimized efficiency and delivers 28 µA/MHz run current at 3.3 V - deployed in battery-powered IoT sensor nodes requiring long-life operation with real-time signal acquisition and USB connectivity.
For engineers reviewing the STM32L412RBT6P datasheet, STM32L412RBT6P pinout, STM32L412RBT6P application, or STM32L412RBT6P equivalent, key selection criteria include verified low-power mode timing (4 µs Stop-mode wakeup), RTC+calendar support, LPUART wake capability, and Quad SPI XIP interface for secure firmware expansion - all validated in production-grade DS12469 Rev 9.
Technical Context
This MCU implements the Arm Cortex-M4 core with FPU and Adaptive Real-Time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz. Its FlexPowerControl architecture integrates multiple voltage regulators (LDO/SMPS), programmable low-power modes (Shutdown: 16 nA; Standby with RTC: 245 nA), and hardware-based power gating per peripheral domain.
The device features a dedicated interconnect matrix for deterministic bus arbitration, independent analog supply domains for noise isolation, and dual 12-bit ADCs with hardware oversampling up to 16-bit resolution - supporting simultaneous sampling and calibration without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance - enables real-time DSP and control algorithms without external coprocessor. |
| Memory | 128 KB single-bank flash with readout protection; 40 KB SRAM (8 KB parity-checked) - supports secure firmware storage and robust data buffering in safety-critical tasks. |
| Power Consumption | 28 µA/MHz in SMPS-run mode @3.3 V - reduces battery drain in always-on edge devices by >65% vs LDO-only operation. |
| ADC | Dual 12-bit, 5 Msps, hardware oversampling to 16-bit - allows high-fidelity sensor signal digitization (e.g., temperature, pressure) with minimal software overhead. |
| Low-Power Modes | Shutdown: 16 nA (4 wakeup pins); Standby with RTC: 245 nA - extends coin-cell battery life to multi-year operation in maintenance-free deployments. |
| Connectivity | USB 2.0 full-speed (crystal-less), 3× I²C (FM+), 3× USART, LPUART, 2× SPI, Quad SPI with XIP - enables direct USB-CDC communication and external flash expansion without host controller. |
| Analog Peripherals | 1 op-amp with programmable gain amplifier (PGA); 1 ultra-low-power comparator - supports sensor front-end conditioning and threshold detection with sub-µA quiescent current. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 52 fast I/Os - most pins 5 V-tolerant, enabling direct interfacing with legacy logic and industrial sensors without level shifters.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.71–3.6 V operation; decoupling required per datasheet layout guidelines to maintain SMPS stability and ADC accuracy. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2 | General-purpose I/Os | 52 total GPIOs; majority 5 V-tolerant - simplifies mixed-voltage system integration and reduces BOM count. |
| PA13/PA14 | SWDIO/SWCLK | Serial Wire Debug interface - enables non-intrusive programming and real-time tracing without JTAG pins. |
| PA9/PA10 | USART1_TX/USART1_RX | Full-duplex UART interface - supports bootloader updates, debug logging, and host communication at up to 4.5 Mbps. |
| PA11/PA12 | USB_DM/USB_DP | Crysal-less USB 2.0 FS interface - eliminates external crystal, reducing cost and PCB area while maintaining ±0.25% clock accuracy via internal CRS. |
| PC13/PC14/PC15 | RTC_OUT/LSE_IN/LSE_OUT | 32 kHz RTC oscillator circuit - enables calendar functions and precise wake-up scheduling with <±20 ppm accuracy over -40°C to +85°C. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic switching between LDO and external SMPS, reducing active-mode current by 65% and extending battery life in portable medical monitors. |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz - eliminates instruction cache misses during interrupt-driven control loops in motor drives. |
| Dual 12-bit ADC with hardware oversampling | Delivers 16-bit effective resolution at 125 kSPS without CPU load - ideal for precision analog sensor fusion in environmental sensing nodes. |
| Batch Acquisition Mode (BAM) | Allows CPU to remain in Stop mode while ADC, timers, and DMA autonomously collect and process sensor data - cuts average system power by >90% in periodic monitoring. |
| True Random Number Generator (RNG) | FIPS-compliant entropy source - enables secure key generation for TLS handshakes in constrained IoT edge gateways. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and CO₂ every 30 seconds, transmitting via BLE or LoRaWAN. IC Role / Device Role / Timing Role: Main application processor managing sensor drivers, ADC sampling, data preprocessing, and radio stack timing synchronization. Use Value: 245 nA Standby-with-RTC and 4 µs Stop-mode wakeup enable microsecond-precision sampling triggers while sustaining >5-year coin-cell operation. |
Use Scenario: Handheld ECG or pulse oximeter requiring clinical-grade analog front-end, real-time waveform analysis, and USB-CDC data export. IC Role / Device Role / Timing Role: Signal acquisition controller handling dual-channel ADC sampling, op-amp PGA gain adjustment, and real-time QRS detection. Use Value: Integrated op-amp with PGA and 12-bit ADC (5 Msps) eliminate external signal conditioning ICs, reducing size and power in Class IIa medical devices. |
| Smart Utility Meter | Industrial Predictive Maintenance Node |
|
Use Scenario: Gas/water meter with ultrasonic flow sensing, tamper detection, and NB-IoT backhaul - operating unattended for 10+ years. IC Role / Device Role / Timing Role: System-on-chip managing metrology calculations, RTC-calendar timestamping, secure firmware updates, and low-power communication. Use Value: 128 KB flash with code readout protection and 96-bit unique ID support secure OTA updates and anti-counterfeiting in utility infrastructure. |
Use Scenario: Vibration and temperature monitor on rotating machinery, performing FFT analysis and anomaly detection before alerting via cellular modem. IC Role / Device Role / Timing Role: Edge inference accelerator running lightweight ML models (e.g., TinyML) on sensor fusion data with deterministic timer-triggered sampling. Use Value: Cortex-M4+FPU + ART Accelerator enables 32-bit floating-point FFT computation in <10 ms at 80 MHz - eliminating need for external DSP. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L432KCU6 | Same L4 series, but 256 KB flash, 64 KB SRAM, includes AES-256 crypto accelerator and USB PD controller - no Quad SPI XIP. | Better suited for secure firmware signing and USB Type-C power delivery negotiation - less optimal for memory-constrained cost-sensitive designs. | Select when cryptographic acceleration or USB PD compliance is mandatory; avoid if Quad SPI XIP or minimal footprint is prioritized. |
| STM32L072RBT6 | Cortex-M0+, lower performance (32 MHz), 128 KB flash, 20 KB SRAM, no FPU or ART - higher active current (116 µA/MHz). | Targeted at simpler control tasks (e.g., basic timers, GPIO sequencing) where DSP or high-resolution ADC is unnecessary. | Choose for lowest-cost entry-level ultra-low-power design with minimal processing requirements - not suitable for real-time sensor fusion or USB audio. |
Compared with STM32L432KCU6, the STM32L412RBT6P offers smaller footprint and Quad SPI XIP at lower cost but lacks crypto acceleration; versus STM32L072RBT6, it delivers 3× higher DMIPS and 2.5× lower active current, making it superior for complex edge analytics in space- and power-constrained systems.
Availability
STM32L412RBT6P is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart utility meters, and industrial predictive maintenance nodes requiring stable component supply across multi-year production cycles.
Supply support for STM32L412RBT6P 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, specializing in microcontrollers, power management, and analog/mixed-signal solutions for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with design focus on battery longevity, secure firmware execution, and integrated analog signal chain capabilities for edge intelligence.
FAQ
What is the maximum operating frequency and corresponding performance metric of the STM32L412RBT6P?
The STM32L412RBT6P operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and ART Accelerator™, delivering 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance level supports real-time control, sensor fusion, and lightweight machine learning inference without external co-processors.
Does the STM32L412RBT6P support external SMPS, and how does it impact power efficiency?
Yes, the STM32L412RBT6P supports external SMPS via dedicated VDD12 and VDDA12 pins. In SMPS-run mode, it achieves 28 µA/MHz at 3.3 V - a 65% reduction versus LDO-mode (79 µA/MHz) - directly extending battery life in always-on applications like environmental sensors and wearables.
What analog peripherals are integrated, and what are their key specifications?
The device integrates two 12-bit ADCs (5 Msps, hardware oversampling to 16-bit), one operational amplifier with built-in PGA, and one ultra-low-power comparator. The op-amp supports rail-to-rail input/output and programmable gain (1–40×), enabling direct sensor signal conditioning without external components.
Is the STM32L412RBT6P pin-compatible with other STM32L4xx variants in the same package?
No - while sharing the LQFP64 footprint with some L4-series MCUs (e.g., STM32L432KCU6), the STM32L412RBT6P has distinct peripheral mapping and pin assignments. Pin compatibility must be verified per datasheet Table 14; for example, USB DP/DM are on PA11/PA12 in L412, but differ in L432's alternate function remapping.
STM32L412RBT6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- I2C, Infrared, IrDA, LINbus, Quad SPI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT, (External SMPS Required)
- Number of I/O:
- 50
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 40K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L412RBT6P FAQ
1.How can I place an order for STM32L412RBT6P through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L412RBT6P 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 STM32L412RBT6P reliable?
The price and inventory of STM32L412RBT6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L412RBT6P is usually 5 days.
3.What payment methods are accepted for STM32L412RBT6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L412RBT6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L412RBT6P?
STM32L412RBT6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L412RBT6P 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 STM32L412RBT6P?
For technical support, including STM32L412RBT6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L412RBT6P requirements.
6.How does Aetrix verify that STM32L412RBT6P is sourced from the original manufacturer or authorized distributors?
All STM32L412RBT6P 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 STM32L412RBT6P meets industry standards.
7.What is the process for return or replacement of STM32L412RBT6P?
All STM32L412RBT6P units undergo pre-shipment inspection (PSI). If there is an issue with STM32L412RBT6P, 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 STM32L412RBT6P part is unused and in its original packaging.
Return procedure for STM32L412RBT6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L412RBT6P Tags
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ATTINY4-TSHR
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PIC10F200T-I/OT
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