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STMicroelectronics STM32L412CBT6P
- Part No.:
- STM32L412CBT6P
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L412CBT6P.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,782
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Product details
Overview
STM32L412CBT6P from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz, 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 - ideal for battery-powered IoT sensor nodes requiring long runtime and real-time signal processing.
For engineers reviewing the STM32L412CBT6P datasheet, STM32L412CBT6P pinout, STM32L412CBT6P application, or STM32L412CBT6P equivalent, key selection criteria include verified low-power mode timing (4 µs wakeup from Stop), RTC+calendar support, USB 2.0 full-speed crystal-less operation, and LQFP32 package compatibility with 5 V-tolerant I/Os for mixed-voltage system interfacing.
Technical Context
The device implements FlexPowerControl architecture with multiple low-power modes: 16 nA Shutdown, 32 nA Standby (4 wakeup pins), 245 nA Standby+RTC, and 0.7 µA/MHz Run mode with LDO or 28 µA/MHz with external SMPS. Its ART Accelerator™ enables zero-wait-state execution from flash at 80 MHz.
It integrates a full peripheral set for edge sensing and connectivity: 10 timers (including 2 low-power 16-bit timers active in Stop mode), USB 2.0 FS without external crystal, LPUART for Stop 2 wake-up, and Quad SPI with XIP capability for external memory expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, 100 DMIPS @ 80 MHz - enables real-time control and floating-point math in compact firmware. |
| Flash / SRAM | 128 KB single-bank flash with readout protection; 40 KB SRAM (8 KB with hardware parity) - sufficient for secure OTA updates and safety-critical data buffering. |
| Power Efficiency | 28 µA/MHz in Run mode with SMPS; 32 nA Standby (4 wakeup pins); 4 µs wakeup from Stop - extends coin-cell battery life to multi-year operation. |
| Analog Peripherals | Dual 12-bit ADCs (5 Msps, 16-bit oversampling), 1 op-amp with PGA, 1 ultra-low-power comparator - supports precision sensor signal conditioning without external components. |
| Connectivity | USB 2.0 FS crystal-less, 3× I²C FM+, 3× USART (LIN/IRDA/ISO7816), LPUART, 2× SPI + Quad SPI - enables direct USB-C interface and multi-sensor bus aggregation. |
| Package & I/O | LQFP32 (7×7 mm), 26 general-purpose I/Os (most 5 V-tolerant) - fits space-constrained industrial and wearable PCB layouts with legacy voltage level compatibility. |
Pinout & Package
LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.71–3.6 V) | Supplies core and I/O domains; supports external SMPS input via VDD12 for sub-30 µA/MHz efficiency. |
| VSS | Ground reference | Dedicated analog/digital ground pins ensure noise isolation for ADC and RTC operation. |
| PA0–PA15, PB0–PB12 | General-purpose I/Os | 26 GPIOs total; most are 5 V-tolerant - simplifies level-shifting in mixed-voltage systems (e.g., 3.3 V MCU + 5 V sensors). |
| PC13–PC15 | RTC oscillator & reset | PC14/PC15 accept 32.768 kHz LSE crystal; PC13 drives RTC calendar and tamper detection. |
| PA9/PA10 | USB D+/D− | Crytal-less USB 2.0 FS interface - eliminates external 48 MHz crystal, reducing BOM cost and board area. |
| PA2/PA3 | USART2 TX/RX | Support LIN physical layer and IrDA modulation - enables automotive diagnostics and remote IR control. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 7 distinct low-power modes with validated current specs - allows precise energy budgeting for duty-cycled sensor applications. |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz - eliminates cache misses in time-critical ISR handling and deterministic control loops. |
| Integrated analog front-end | Dual ADCs with hardware oversampling + op-amp + comparator - replaces discrete signal chain components in gas, temperature, or capacitive touch sensing. |
| Crystal-less USB 2.0 FS | Internal 48 MHz clock recovery with ±0.25% accuracy - removes crystal and load caps, cutting component count and EMI sources. |
| Quad SPI with XIP | Direct code execution from external flash via QSPI interface - expands effective program memory beyond 128 KB without external bus logic. |
Applications
| Smart Utility Meter | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated water/gas meter logging flow rate, temperature, and pressure every 15 minutes with encrypted RF transmission. IC Role / Device Role / Timing Role: Primary controller executing metrology algorithms, managing RTC-based scheduling, and driving sub-GHz transceiver via SPI. Use Value: 245 nA Standby+RTC and 4 µs wakeup enable >10-year battery life on CR2450 while maintaining accurate timekeeping and fast response to pulse events. | Use Scenario: Optical heart-rate sensor with PPG signal acquisition, motion artifact correction, and Bluetooth LE data streaming. IC Role / Device Role / Timing Role: Analog front-end processor: synchronizing ADC sampling, filtering raw PPG data, and triggering LPUART wake-up for burst transmission. Use Value: Dual 12-bit ADCs (5 Msps) + hardware oversampling + built-in op-amp allow high-SNR photodiode signal conditioning within 1.5 mm² PCB area. |
| Industrial Predictive Maintenance Node | Asset Tracking Beacon |
Use Scenario: Vibration and temperature monitoring on rotating machinery using MEMS accelerometer and thermistor, transmitting alerts via LoRaWAN. IC Role / Device Role / Timing Role: Sensor fusion hub: reading I²C accelerometer, oversampling thermistor ADC, and managing deep-sleep cycles between 10-second acquisitions. Use Value: 28 µA/MHz Run mode with SMPS and 32 nA Standby reduce average current to <10 µA - enabling 5-year operation on two AA cells. | Use Scenario: GPS-denied indoor asset tracker using BLE beaconing and RSSI-based proximity detection in warehouses. IC Role / Device Role / Timing Role: Low-power location coordinator: scanning for BLE beacons via LPUART-linked module, logging timestamps in backup registers, and waking only on geofence breach. Use Value: 300 nA VBAT mode powers RTC and 32×32-bit backup registers during main power loss - preserves last-known position and uptime across power interruptions. |
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 and SHA-256 crypto accelerators; QFN32 package. | Better suited for secure firmware updates and TLS stack execution in connected devices. | Select when cryptographic offload and larger memory footprint are required over minimal BOM cost. |
| EFM32PG12B500F1024GL125 | Silicon Labs MCU: 1024 KB flash, 256 KB RAM, 1.42 µA deep-sleep, but no USB or Quad SPI; QFN64 package. | Optimized for sub-µA sleep-only applications with heavy sensor polling, lacking host-facing interfaces. | Choose only if USB connectivity and external memory expansion are unnecessary and lowest possible sleep current is critical. |
Compared with STM32L412CBT6P, STM32L432KCU6 offers enhanced security and memory for cloud-connected edge nodes, while EFM32PG12B500F1024GL125 trades interface richness for deeper sleep efficiency - making STM32L412CBT6P the optimal balance of USB, analog integration, and ultra-low-power runtime in LQFP32 form factor.
Availability
STM32L412CBT6P is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial predictive maintenance nodes, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32L412CBT6P 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog chips for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding rich analog integration, secure firmware execution, and flexible power management - specifically engineered for battery-operated edge intelligence.
FAQ
What is the maximum operating frequency and corresponding power supply configuration for STM32L412CBT6P?
The STM32L412CBT6P achieves 80 MHz maximum CPU frequency using the internal PLL with HSI16 or HSE clock source. For lowest power, it operates in SMPS mode with VDD12 = 1.10 V, delivering 28 µA/MHz in Run mode. LDO mode supports same frequency but consumes 79 µA/MHz - design choice depends on whether external DC-DC is available.
Does STM32L412CBT6P support hardware encryption acceleration?
No, STM32L412CBT6P does not include dedicated cryptographic accelerators such as AES or HASH engines. It relies on software libraries for encryption tasks. Devices like STM32L432KCU6 in the same family add AES-256 and SHA-256 hardware acceleration - this part prioritizes analog integration and ultra-low-power efficiency over security acceleration.
Can the internal op-amp be used in standalone mode without external components?
Yes, the integrated op-amp supports non-inverting, inverting, and follower configurations using internal resistors and programmable gain (1x, 2x, 3x, 4x, 8x, 16x, 32x, 64x). It requires no external feedback components for basic gain stages, enabling compact analog signal conditioning directly on-chip - confirmed in Section 3.17 and Table 6.3.20 of DS12469 Rev 9.
What is the minimum supply voltage and associated functional limitation?
The absolute minimum supply voltage is 1.71 V per datasheet Section 6.2. Below this, brown-out reset triggers and flash/SRAM access is disabled. At 1.71 V, maximum CPU frequency drops to 24 MHz (vs. 80 MHz at ≥3.0 V), and some analog peripherals like ADC may require reduced sampling rates or calibration adjustments - detailed in Section 6.3.1 and Table 21.
STM32L412CBT6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 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
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L412CBT6P FAQ
1.How can I place an order for STM32L412CBT6P through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L412CBT6P 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 STM32L412CBT6P reliable?
The price and inventory of STM32L412CBT6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L412CBT6P is usually 5 days.
3.What payment methods are accepted for STM32L412CBT6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L412CBT6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L412CBT6P?
STM32L412CBT6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L412CBT6P 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 STM32L412CBT6P?
For technical support, including STM32L412CBT6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L412CBT6P requirements.
6.How does Aetrix verify that STM32L412CBT6P is sourced from the original manufacturer or authorized distributors?
All STM32L412CBT6P 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 STM32L412CBT6P meets industry standards.
7.What is the process for return or replacement of STM32L412CBT6P?
All STM32L412CBT6P units undergo pre-shipment inspection (PSI). If there is an issue with STM32L412CBT6P, 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 STM32L412CBT6P part is unused and in its original packaging.
Return procedure for STM32L412CBT6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L412CBT6P Tags
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ATTINY4-TSHR
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PIC10F200T-I/OT
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