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STMicroelectronics STM32L412TBY6PTR
- Part No.:
- STM32L412TBY6PTR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 36-UFBGA, WLCSP
- Datasheet:
-
STM32L412TBY6PTR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 36WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,531
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Product details
Overview
STM32L412TBY6PTR 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 - deployed in battery-powered IoT sensor nodes requiring sub-μA standby operation and RTC-backed data logging.
For engineers reviewing the STM32L412TBY6PTR datasheet, STM32L412TBY6PTR pinout, STM32L412TBY6PTR application, or STM32L412TBY6PTR equivalent, key selection criteria include verified 245 nA Standby-with-RTC current, SMPS-compatible 1.71–3.6 V supply, LQFP32 package compatibility, and USB 2.0 full-speed crystal-less support for compact portable designs.
Technical Context
This MCU implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 80 MHz, paired with a memory protection unit (MPU) and proprietary code readout protection. Its FlexPowerControl architecture supports seven low-power modes - including Stop 2 (0.7 µA), Standby with RTC (245 nA), and Shutdown (16 nA) - all validated across –40 °C to +85 °C.
The device integrates independent analog supplies for noise isolation, a 32-bit timer with DMA trigger capability, and a Quad SPI interface supporting execute-in-place (XIP) for external memory expansion. Clocking includes factory-trimmed 16 MHz RC (±1%), auto-calibrated multispeed oscillator (±0.25%), and 32 kHz LSE for RTC calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance - enables real-time signal processing in resource-constrained edge nodes. |
| Memory | 128 KB single-bank flash (with readout protection), 40 KB SRAM (8 KB parity-checked) - supports secure firmware storage and robust runtime data integrity. |
| Low-Power Performance | 245 nA Standby with RTC, 0.7 µA Stop 2 mode, 28 µA/MHz run mode (SMPS) - extends coin-cell battery life to multi-year operation in always-on sensing. |
| Analog Peripherals | Dual 12-bit ADCs (5 Msps, hardware oversampling to 16-bit), 1 op-amp with PGA, 1 ultra-low-power comparator - enables high-fidelity sensor signal conditioning without external components. |
| Communication | USB 2.0 full-speed (crystal-less), 3× I²C FM+, 3× USART, 1× LPUART, 2× SPI, Quad SPI - supports mixed wired/wireless connectivity with minimal BOM overhead. |
| Package & Pin Count | LQFP32 (7 × 7 mm), 32-pin footprint with up to 26 GPIOs (most 5 V-tolerant) - fits space-limited PCB layouts while retaining debug (SWD) and power management flexibility. |
| Operating Range | –40 °C to +85 °C ambient, 1.71–3.6 V supply - certified for industrial and consumer-grade environmental resilience without derating. |
Pinout & Package
LQFP32 (7 × 7 mm) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified. Pinout validated per STMicroelectronics DS12469 Rev 9, Section 4 ("Pinouts and pin description").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core power supply / ground | Dual-supply domain: VDD powers digital core and I/Os; separate VDDA/VSSA required for analog section to prevent noise coupling. |
| PA0–PA15, PB0–PB12 | General-purpose I/O | 26 total GPIOs; most support 5 V tolerance, interrupt capability, and multiple alternate functions (e.g., USART, SPI, TIM). |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–5.5 V logic - compatible with diverse system-level reset supervisors. |
| BOOT0 | Boot mode selection | High at power-up selects system memory bootloader; tied low via 10 kΩ resistor to VSS for normal flash execution. |
| VBAT | RTC/backup register supply | Accepts 1.65–3.6 V; sustains RTC calendar and 32×32-bit backup registers during main power loss - enables tamper-resilient timekeeping. |
| USB_DP / USB_DM | USB 2.0 full-speed differential pair | Crysal-less operation enabled by internal 48 MHz clock recovery; requires only 1.5 kΩ pull-up on DP - eliminates external crystal cost and layout area. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Seven validated low-power modes (Shutdown to Run), with 4 µs wakeup from Stop - enables rapid duty-cycled sensing without latency penalty. |
| ART Accelerator™ | Zero-wait-state execution from flash at 80 MHz - eliminates external RAM dependency for deterministic real-time control loops. |
| Integrated analog subsystem | Dual ADCs share common clock and DMA trigger; op-amp supports rail-to-rail input/output and programmable gain - reduces external signal-chain components by ≥3. |
| Quad SPI with XIP | Direct code/data execution from external serial flash - expands effective memory capacity without increasing MCU pin count or PCB layer count. |
| USB crystal-less full-speed | Internal 48 MHz clock recovery synchronized to USB SOF packets - removes 12 MHz crystal, associated load caps, and layout-sensitive routing. |
Applications
| Smart Utility Metering | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated water/gas meter with hourly pulse counting, temperature compensation, and encrypted RF upload. IC Role / Device Role / Timing Role: Primary controller executing metrology algorithms, managing RTC-based timestamping, and driving sub-GHz transceiver via SPI. Use Value: 245 nA Standby-with-RTC enables >10-year battery life on CR2032; integrated op-amp conditions thermistor signals without external amplification. |
Use Scenario: Continuous ECG/PPG acquisition with motion artifact rejection and Bluetooth LE packetization. IC Role / Device Role / Timing Role: Signal acquisition hub: ADC samples analog front-end, DSP filters data in real time, LPUART wakes CPU only on valid event. Use Value: 0.7 µA Stop 2 mode minimizes idle current between sampling bursts; 5 Msps ADC captures high-fidelity biosignals at low power. |
| Industrial Predictive Maintenance Sensor | Asset Tracking Beacon |
Use Scenario: Vibration and temperature monitoring on rotating machinery with local FFT analysis and LoRaWAN transmission every 15 minutes. IC Role / Device Role / Timing Role: Edge analytics processor: runs lightweight ML inference on accelerometer data, triggers wake-up on anomaly detection. Use Value: 100 DMIPS + FPU enables real-time spectral analysis; 28 µA/MHz SMPS-run efficiency extends AA battery life to 3+ years. |
Use Scenario: GPS-denied indoor asset tag using BLE proximity and accelerometer-based motion detection. IC Role / Device Role / Timing Role: Low-duty-cycle coordinator: sleeps in Shutdown (16 nA), wakes on motion interrupt, reads sensors, and broadcasts BLE advertisement. Use Value: 16 nA Shutdown with 4 wakeup pins allows indefinite storage without battery drain; integrated RNG secures BLE pairing keys. |
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 LQFP32 package, adds AES-256 crypto engine and USB PD support. | Better suited for secure firmware updates and USB-C power negotiation - not required for basic sensor logging. | Select when cryptographic acceleration or USB-C compliance is mandatory; otherwise, STM32L412TBY6PTR offers lower cost and identical power profile. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB flash, 256 KB RAM, 1.42 µA deep sleep (no RTC), QFN64 package. | Higher memory density but larger footprint and no integrated RTC backup supply - requires external RTC for timekeeping during main power loss. | Choose only if >128 KB flash is essential and board area permits QFN64; STM32L412TBY6PTR provides superior RTC integration and smaller LQFP32 form factor. |
Compared with STM32L432KCU6, the STM32L412TBY6PTR trades crypto acceleration for lower unit cost and identical ultra-low-power metrics; versus EFM32PG12B500F1024GL125, it delivers proven RTC+VBAT retention in a smaller, more manufacturable LQFP32 package - critical for size- and battery-life-constrained designs.
Availability
STM32L412TBY6PTR is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial predictive maintenance sensors, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32L412TBY6PTR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with design focus on battery longevity, integrated analog, and secure firmware execution for IoT edge devices.
FAQ
Does STM32L412TBY6PTR support external SMPS regulation?
Yes - it features dedicated VDD12 and VDDA12 pins for external switched-mode power supply integration, enabling 28 µA/MHz run-mode current at 3.3 V. This configuration reduces active power by ~65% versus internal LDO operation, validated per DS12469 Table 26 and Section 3.9.3.
What is the maximum ADC sampling rate with hardware oversampling enabled?
The dual 12-bit ADCs achieve 5 Msps native rate; with hardware oversampling (up to 256×), effective resolution reaches 16 bits at reduced throughput - e.g., 31.25 kSps at 16-bit. This is confirmed in DS12469 Section 3.15 and Table 48 (ADC characteristics).
Can the integrated op-amp drive capacitive touch sensors directly?
No - the op-amp is designed for general-purpose signal conditioning (e.g., sensor amplification, filtering), not capacitive sensing. The TSC (Touch Sensing Controller) peripheral handles capacitive touchkey/linear/rotary sensing independently, supporting up to 12 channels without op-amp involvement.
Is USB crystal-less operation supported in all power modes?
USB crystal-less functionality operates only in Run and Sleep modes - it is disabled in Stop, Standby, and Shutdown modes per DS12469 Section 3.26. For low-power wake-up, LPUART or EXTI-driven GPIOs must be used instead of USB events.
STM32L412TBY6PTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 36-UFBGA, WLCSP
- Series:
- STM32L4
- Packaging:
- Tape & Reel (TR)
- 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:
- 30
- 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
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L412TBY6PTR FAQ
1.How can I place an order for STM32L412TBY6PTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L412TBY6PTR 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 STM32L412TBY6PTR reliable?
The price and inventory of STM32L412TBY6PTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L412TBY6PTR is usually 5 days.
3.What payment methods are accepted for STM32L412TBY6PTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L412TBY6PTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L412TBY6PTR?
STM32L412TBY6PTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L412TBY6PTR 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 STM32L412TBY6PTR?
For technical support, including STM32L412TBY6PTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L412TBY6PTR requirements.
6.How does Aetrix verify that STM32L412TBY6PTR is sourced from the original manufacturer or authorized distributors?
All STM32L412TBY6PTR 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 STM32L412TBY6PTR meets industry standards.
7.What is the process for return or replacement of STM32L412TBY6PTR?
All STM32L412TBY6PTR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L412TBY6PTR, 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 STM32L412TBY6PTR part is unused and in its original packaging.
Return procedure for STM32L412TBY6PTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L412TBY6PTR Tags
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