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STMicroelectronics STM32L433RCT6P
- Part No.:
- STM32L433RCT6P
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L433RCT6P.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:740
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Product details
Overview
STM32L433RCT6P from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 256 KB flash, 64 KB SRAM, USB FS, LCD controller, and integrated SMPS support. It delivers 36 µA/MHz in SMPS-run mode, 280 nA Standby with RTC, and supports capacitive touch sensing for battery-powered portable instrumentation.
For engineers reviewing the STM32L433RCT6P datasheet, STM32L433RCT6P pinout, STM32L433RCT6P application, or STM32L433RCT6P equivalent, key selection criteria include ultra-low-power operation across multiple sleep modes, integrated LCD driver with step-up converter, dual 12-bit DACs, and CAN 2.0B interface for industrial edge nodes.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture supports dual supply schemes: internal LDO or external SMPS, with dynamic voltage scaling between VDD=1.71–3.6 V and VDD12=1.05–1.15 V.
Clock system includes two PLLs (for system/USB/audio), auto-trimmed multispeed oscillator (±0.25%), and hardware calendar RTC with calibration. Analog subsystem comprises one 12-bit 5 Msps ADC (with 16-bit oversampling), two 12-bit DACs, one op-amp with PGA, and two ultra-low-power comparators - all on independent analog supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP and control algorithms without external co-processor |
| Memory | 256 KB flash (single-bank, code readout protected), 64 KB SRAM (16 KB with parity) - supports secure firmware storage and robust data buffering |
| Power Consumption | 36 µA/MHz in SMPS-run mode - reduces battery drain in always-on sensor nodes |
| Low-Power Modes | 280 nA Standby with RTC, 8 nA Shutdown - extends shelf life and operational runtime in energy-harvesting systems |
| Analog Peripherals | 1× 12-bit 5 Msps ADC, 2× 12-bit DAC, 1× op-amp with PGA, 2× comparators - enables closed-loop analog signal conditioning without external ICs |
| Connectivity | USB 2.0 FS (crystal-less), CAN 2.0B, 4× USART, 3× I²C, 3× SPI, LPUART, SAI - supports mixed wired/wireless industrial communication stacks |
| LCD Driver | 8×40 or 4×44 segment drive with integrated step-up converter - eliminates external bias supply for segment LCDs in portable medical devices |
| Package | LQFP64 (10 × 10 mm), 64-pin, ECOPACK2-compliant - compatible with standard reflow assembly and manual prototyping |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant and ECOPACK2 certified. Pin count and layout optimized for balanced signal integrity, debug access (SWD), and low-noise analog routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power and ground | Dual-supply domain: VDD powers digital core and I/Os; separate VDDA/VSSA required for analog peripherals |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PH0–PH1 | General-purpose I/Os | Up to 83 fast I/Os (most 5 V-tolerant); support 16 alternate functions including USB, CAN, LCD, and touch sensing |
| VBAT | Backup power supply | Supplies RTC and 32×32-bit backup registers during main power loss - enables persistent timekeeping and state retention |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset button or supervisor IC integration |
| BOOT0 | Boot mode selection | High at power-up selects system memory bootloader; used for field firmware recovery via USART |
| PA11/PA12 | USB D+/D− | Crystal-less USB 2.0 Full-Speed interface - eliminates external 48 MHz crystal and matching components |
| PD0/PD1 | OSC_IN/OSC_OUT | 4–48 MHz external crystal connection for main system clock - configurable for high-precision timing |
| PC13/PC14/PC15 | LSE pins | 32.768 kHz crystal connection for RTC calibration and low-power wake-up timer |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Eight low-power modes (Shutdown, Stop2, Standby with RTC) with sub-µA quiescent current - enables multi-year battery life in IoT endpoints |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz - eliminates performance penalty of embedded flash vs. SRAM execution |
| Integrated SMPS support | External switch-mode power supply interface (VDD12) - improves system efficiency by >30% vs. LDO-only operation at high current |
| Capacitive touch sensing (TSC) | 21-channel hardware-accelerated touch controller - supports touchkey, linear, and rotary sensors without CPU overhead |
| Hardware crypto acceleration | CRC calculation unit + 96-bit unique ID - enables firmware signature verification and device identity binding |
| True random number generator (RNG) | FIPS-compliant entropy source - satisfies security requirements for TLS handshake and key generation |
Applications
| Portable Medical Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Battery-powered handheld ECG or blood glucose meter with segment LCD display and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Main application controller managing analog front-end sampling, LCD refresh, USB charging detection, and low-power BLE coexistence. Use Value: 280 nA Standby with RTC preserves time/date across battery swaps; integrated LCD driver eliminates external bias IC; 12-bit DAC calibrates sensor references. | Use Scenario: Tamper-resistant electricity/water meter with pulse counting, magnetic interference immunity, and RF mesh backhaul. IC Role / Device Role / Timing Role: System-on-chip handling metrology ADC acquisition, CAN-based local bus communication, and secure firmware updates over LPWAN. Use Value: Dual 12-bit DACs generate precision calibration signals; CAN 2.0B enables interoperability with legacy AMI infrastructure; 8 nA Shutdown mode meets IEC 62056 standby requirements. |
| Industrial HMI Panel | Asset Tracking Beacon |
Use Scenario: DIN-rail mounted human-machine interface with 4×44-segment LCD, tactile buttons, and RS-485 fieldbus. IC Role / Device Role / Timing Role: Primary UI processor driving LCD segments, scanning capacitive keys, and bridging Modbus RTU to local CAN network. Use Value: 8×40 LCD controller supports custom alphanumeric displays; TSC channels detect button press without debounce firmware; LPUART wakes CPU from Stop2 on serial command. | Use Scenario: GPS-enabled logistics tag powered by coin cell, reporting location every 6 hours via NB-IoT. IC Role / Device Role / Timing Role: Power-aware host MCU coordinating GPS fix, cellular transmit burst, and accelerometer-triggered wake-up. Use Value: 4 µs wakeup from Stop mode minimizes latency during motion events; 36 µA/MHz SMPS-run efficiency extends battery life to >5 years; RTC alarm triggers periodic GPS acquisition. |
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, no LCD, no CAN, QFN32 package | Suitable for compact sensor nodes without display or fieldbus requirements | Select when footprint and BOM cost are prioritized over display/CAN capability |
| STM32L476RGT6 | 1 MB flash, 128 KB SRAM, full-speed USB + OTG, no SMPS support, LQFP64 | Better for USB-host applications (e.g., USB HID devices) but higher active current | Choose when larger code space and USB device/host flexibility outweigh ultra-low-power optimization |
Compared with STM32L432KCU6, the STM32L433RCT6P adds LCD, CAN, and 4× more flash/SRAM for richer HMI and industrial protocols; versus STM32L476RGT6, it trades USB OTG and memory size for superior sub-µA low-power modes and integrated SMPS efficiency - making it optimal for battery-constrained edge nodes requiring display and fieldbus interfaces.
Availability
STM32L433RCT6P is available at Aetrix Electronics and suitable for portable medical monitors, smart utility meters, industrial HMI panels, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L433RCT6P 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.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance per µA, with design focus on battery-operated industrial, medical, and metering equipment requiring long service life and rich peripheral integration.
FAQ
What is the maximum operating frequency and corresponding performance metric?
The STM32L433RCT6P operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and ART Accelerator™. Its performance is rated at 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark®, achieving 3.42 CoreMark/MHz. This enables real-time execution of floating-point control loops and audio processing without external coprocessors.
Does this MCU support external SMPS, and how does it affect power efficiency?
Yes, the STM32L433RCT6P supports external switch-mode power supply via dedicated VDD12 pin (1.05–1.15 V). In SMPS-run mode, it achieves 36 µA/MHz - a 60% reduction versus 84 µA/MHz in LDO-run mode. This directly extends battery life in applications like portable meters and wearables where sustained active operation is required.
How many capacitive sensing channels does the TSC support, and what topologies are enabled?
The Touch Sensing Controller (TSC) provides 21 hardware-accelerated channels supporting touchkey, linear touch slider, and rotary touch wheel topologies. It includes built-in charge transfer measurement, spread-spectrum modulation, and noise filtering - enabling robust touch detection even in noisy industrial environments without CPU intervention.
Is the USB interface crystal-less, and what are its compliance features?
Yes, the USB 2.0 Full-Speed interface is crystal-less, using the internal 48 MHz clock recovery system (CRS) synchronized to the USB SOF packet. It supports Link Power Management (LPM) and Battery Charging Detection (BCD) v1.2, enabling direct connection to host PCs and chargers without external crystal or resistor networks - reducing BOM cost and PCB area.
STM32L433RCT6P 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:
- CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, PWM, WDT, (External SMPS Required)
- Number of I/O:
- 52
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L433RCT6P FAQ
1.How can I place an order for STM32L433RCT6P through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433RCT6P 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 STM32L433RCT6P reliable?
The price and inventory of STM32L433RCT6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433RCT6P is usually 5 days.
3.What payment methods are accepted for STM32L433RCT6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433RCT6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433RCT6P?
STM32L433RCT6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433RCT6P 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 STM32L433RCT6P?
For technical support, including STM32L433RCT6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433RCT6P requirements.
6.How does Aetrix verify that STM32L433RCT6P is sourced from the original manufacturer or authorized distributors?
All STM32L433RCT6P 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 STM32L433RCT6P meets industry standards.
7.What is the process for return or replacement of STM32L433RCT6P?
All STM32L433RCT6P units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433RCT6P, 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 STM32L433RCT6P part is unused and in its original packaging.
Return procedure for STM32L433RCT6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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