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STMicroelectronics STM32L412CBT6TR
- Part No.:
- STM32L412CBT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L412CBT6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,460
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Product details
Overview
STM32L412CBT6TR 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 efficiency optimization and targets battery-powered IoT sensor nodes, portable medical devices, and energy-harvesting systems.
For engineers reviewing the STM32L412CBT6TR datasheet, STM32L412CBT6TR pinout, STM32L412CBT6TR application, or STM32L412CBT6TR equivalent, key selection criteria include verified sub-1 µA Stop 2 mode current (0.7 µA), LPUART wake-up capability in deep sleep, Quad SPI XIP support, and 52 fast I/Os with 5 V tolerance - all confirmed in DS12469 Rev 9.
Technical Context
This MCU implements the Adaptive Real-time Accelerator™ (ART) for zero-wait-state execution from flash at 80 MHz and integrates a flexible power architecture with multiple low-power modes: Shutdown (16 nA), Standby with RTC (245 nA), and Stop 2 (0.7 µA). Its interconnect matrix enables concurrent peripheral access without CPU arbitration overhead.
The analog subsystem operates on an independent supply domain and includes hardware oversampling (up to 16-bit effective resolution), built-in temperature sensor, VREFINT reference, and VBAT monitoring - all validated across –40 °C to 85 °C operation per DS12469 §6.3.1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions; enables real-time signal processing in sensor fusion and motor control. |
| Max Clock Frequency | 80 MHz; delivers 100 DMIPS and 3.42 CoreMark/MHz - sufficient for real-time USB audio or closed-loop control. |
| Flash / SRAM | 128 KB single-bank flash with readout protection; 40 KB SRAM (8 KB with hardware parity) - supports secure firmware updates and robust data logging. |
| Low-Power Run Current | 28 µA/MHz in SMPS mode @ 3.3 V - reduces battery drain in always-on edge nodes with active sensing. |
| ADC Performance | Dual 12-bit ADCs, 5 Msps total; hardware oversampling to 16-bit resolution - suitable for precision environmental monitoring. |
| Communication Interfaces | USB 2.0 FS (crystal-less), 3× I²C, 3× USART, 1× LPUART, 2× SPI, Quad SPI with XIP - enables direct NOR/NAND flash boot and low-latency host interfacing. |
| Operating Voltage | 1.71 V to 3.6 V; supports coin-cell (1.8 V) and Li-ion (3.3 V) power sources without external regulators. |
| Temperature Range | –40 °C to 85 °C; qualified for industrial and consumer-grade portable equipment deployment. |
Pinout & Package
STM32L412CBT6TR uses the UFQFPN32 (5 × 5 mm) package with 32-pin layout, optimized for space-constrained PCBs in wearables and smart sensors. Pin functions are defined per DS12469 §4 and validated for 5 V-tolerant I/Os on most pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports dual-supply configuration with external SMPS input (VDD12) for ultra-low-power operation. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/Os | 52 total fast I/Os; majority 5 V-tolerant - simplifies level-shifting in mixed-voltage systems. |
| PA2/PA3 | LPUART_TX/LPUART_RX | Enables wake-up from Stop 2 mode via low-power UART - critical for periodic telemetry transmission. |
| PC13 | RTC_OUT/ALARM_OUT | Dedicated RTC output with calendar and alarm functions - eliminates need for external real-time clock IC. |
| PF0/PF1 | OSC_IN/OSC_OUT | Supports 4–48 MHz crystal oscillator; internal 16 MHz RC (±1%) available for calibration-free startup. |
| NRST | Active-low reset | Internal pull-up; compatible with open-drain reset supervisors and manual reset buttons. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 16 nA Shutdown and 245 nA Standby with RTC - extends shelf life of sealed battery devices beyond 10 years. |
| Batch Acquisition Mode (BAM) | Allows autonomous ADC sampling during CPU sleep - reduces system-level power by eliminating polling overhead. |
| Quad SPI with XIP capability | Permits direct code execution from external flash memory - saves on-chip flash usage and enables field-upgradable firmware. |
| Hardware CRC and 96-bit UID | Provides deterministic checksum computation and device-unique identification - essential for secure boot and anti-cloning. |
| True Random Number Generator (RNG) | Fulfills NIST SP800-90B entropy requirements - enables cryptographic key generation in TLS handshakes and OTA updates. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and CO₂ every 5 minutes using BLE beaconing. IC Role / Device Role / Timing Role: Primary controller managing sensor acquisition, data preprocessing, and low-power radio scheduling. Use Value: Sub-1 µA Stop 2 mode and LPUART wake-up reduce average current to <2 µA - enabling 5+ year operation on CR2032. | Use Scenario: Wearable ECG patch acquiring analog biopotentials, performing real-time QRS detection, and transmitting alerts via Bluetooth LE. IC Role / Device Role / Timing Role: Signal processor running adaptive filtering and peak detection algorithms while maintaining clinical-grade timing accuracy via RTC-calibrated sampling. Use Value: Dual 12-bit ADCs with hardware oversampling achieve >14 ENOB - meeting AAMI EC11 requirements for diagnostic-grade analog front-end. |
| Energy-Harvesting Remote Control | Smart Building Occupancy Detector |
Use Scenario: Solar-powered HVAC remote using indoor light harvesting, capacitive touch interface, and IR transmission. IC Role / Device Role / Timing Role: Capacitive sensing controller (TSC) with 12-channel support and ultra-low-power timer-driven wake-up. Use Value: Integrated TSC eliminates external touch controller; 4 µs wakeup from Stop ensures responsive UI without perceptible latency. | Use Scenario: PIR-based occupancy detector with ambient light sensing, local decision logic, and LoRaWAN backhaul. IC Role / Device Role / Timing Role: System-on-chip integrating motion detection, ambient light ADC, and LoRa modem interface via SPI. Use Value: 52 GPIOs with 5 V tolerance simplify connection to legacy building automation interfaces (e.g., 0–10 V lighting controls). |
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 | 64 KB flash, 16 KB SRAM, same core and peripherals but lacks Quad SPI and has no VBAT domain for backup registers. | Suitable for cost-sensitive designs where external memory expansion is unnecessary and RTC-only backup suffices. | Select when BOM cost reduction outweighs need for external flash boot and extended backup register retention. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB flash, 256 KB RAM, lower active current (114 µA/MHz) but no USB and limited analog integration (no op-amp, single ADC). | Better for high-firmware-complexity applications requiring large code space but less dependent on analog signal chain integration. | Prefer when USB connectivity and embedded analog front-end (op-amp + comparator) are not required. |
Compared with STM32L412CBT6TR, STM32L432KCU6 trades flash/SRAM capacity and Quad SPI for lower unit cost, while EFM32PG12B500F1024GL125 offers higher memory headroom but requires external analog components and lacks USB - making STM32L412CBT6TR optimal for compact, analog-rich, USB-enabled edge nodes.
Availability
STM32L412CBT6TR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, energy-harvesting remotes, and smart building occupancy detectors requiring stable component supply across multi-year production cycles.
Supply support for STM32L412CBT6TR 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, power management, and MEMS sensors - with over 40 years of automotive- and industrial-grade qualification expertise.
The STM32L4 series was designed specifically for ultra-low-power embedded applications demanding rich analog integration, secure firmware execution, and long battery life - targeting IoT endpoints and portable electronics.
FAQ
What is the maximum operating frequency and corresponding performance metric?
The STM32L412CBT6TR runs at up to 80 MHz, delivering 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). This is achieved using the ART Accelerator™ for zero-wait-state flash execution and validated under full voltage and temperature range per DS12469 §3.1.
Does this MCU support external SMPS, and what power savings does it enable?
Yes - the STM32L412CBT6TR supports external SMPS via dedicated VDD12 pin. In SMPS mode, active current drops to 28 µA/MHz at 3.3 V, representing a 65% reduction versus 79 µA/MHz in LDO mode - directly extending battery life in continuous-sensing applications.
How many analog-to-digital converters does it integrate, and what are their key capabilities?
It integrates two independent 12-bit ADCs with combined 5 Msps sampling rate, hardware oversampling up to 16-bit effective resolution, and support for injected/conversion sequences. Both ADCs operate on a dedicated analog supply domain and include internal temperature sensor and VREFINT channels per DS12469 §3.15.
Is USB functionality available without an external crystal, and what compliance level does it meet?
Yes - the integrated USB 2.0 Full-Speed PHY supports crystal-less operation using the internal 48 MHz clock recovery system (CRS), compliant with USB Battery Charging v1.2 (BCD) and Link Power Management (LPM). This eliminates BOM cost and board space for external timing components.
STM32L412CBT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32L4
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- I2C, Infrared, IrDA, LINbus, QSPI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, Temp Sensor, WDT
- Number of I/O:
- 38
- 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 10x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L412CBT6TR FAQ
1.How can I place an order for STM32L412CBT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L412CBT6TR 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 STM32L412CBT6TR reliable?
The price and inventory of STM32L412CBT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L412CBT6TR is usually 5 days.
3.What payment methods are accepted for STM32L412CBT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L412CBT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L412CBT6TR?
STM32L412CBT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L412CBT6TR 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 STM32L412CBT6TR?
For technical support, including STM32L412CBT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L412CBT6TR requirements.
6.How does Aetrix verify that STM32L412CBT6TR is sourced from the original manufacturer or authorized distributors?
All STM32L412CBT6TR 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 STM32L412CBT6TR meets industry standards.
7.What is the process for return or replacement of STM32L412CBT6TR?
All STM32L412CBT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L412CBT6TR, 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 STM32L412CBT6TR part is unused and in its original packaging.
Return procedure for STM32L412CBT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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