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STMicroelectronics STM32L433RCT3
- Part No.:
- STM32L433RCT3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L433RCT3.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:10,853
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Product details
Overview
STM32L433RCT3 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 80 MHz max frequency, 256 KB flash, 64 KB SRAM, and integrated USB FS, LCD controller, and external SMPS support. It delivers 100 DMIPS and operates from 1.71–3.6 V across -40 °C to 105 °C, targeting battery-powered portable medical devices, smart sensors, and energy-harvesting IoT endpoints.
For engineers reviewing the STM32L433RCT3 datasheet, STM32L433RCT3 pinout, STM32L433RCT3 application, or STM32L433RCT3 equivalent, key selection criteria include its 36 µA/MHz SMPS-enabled run mode, 280 nA standby-with-RTC current, 12-bit 5 Msps ADC with hardware oversampling, and LQFP64 package compatibility for space-constrained industrial control interfaces.
Technical Context
The STM32L433RCT3 implements FlexPowerControl architecture with dual voltage regulation (LDO/SMPS), enabling dynamic power scaling across eight low-power modes including Stop 2 (1.28 µA with RTC) and Shutdown (8 nA). Its ART Accelerator™ ensures zero-wait-state execution from flash at 80 MHz.
It integrates a full peripheral suite for sensor fusion and human interface: 21-channel capacitive touch sensing (TSC), LCD controller supporting 8×40 segments, two 12-bit DACs, one op-amp with PGA, and dual ultra-low-power comparators - all operating from independent analog supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS, MPU, DSP instructions |
| Memory | 256 KB flash (single bank, readout protection), 64 KB SRAM (16 KB parity-checked) |
| Power Consumption | 36 µA/MHz in SMPS-run mode; 280 nA Standby with RTC; 8 nA Shutdown |
| Analog Peripherals | 12-bit 5 Msps ADC (16-bit oversampled), 2× 12-bit DACs, 1 op-amp with PGA, 2 comparators |
| Connectivity | USB 2.0 FS (crystal-less), CAN 2.0B, 4× USART, 3× I²C, 3× SPI, Quad-SPI, SAI, SWPMI, SDMMC |
| Special Functions | LCD controller (8×40 / 4×44), 21-channel TSC, true RNG, CRC unit, 96-bit UID |
| Operating Range | 1.71–3.6 V supply; -40 °C to +105 °C ambient temperature |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power and ground | Supplies core and I/O domains; decoupling required per datasheet layout guidelines |
| VDDA, VSSA | Analog power and ground | Independent supply for ADC/DAC/OPAMP/COMP; enables noise isolation and precision measurement |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | Up to 83 fast I/Os (most 5 V-tolerant); support multiple alternate functions including USB, CAN, LCD, and TSC |
| PF0–PF15 | Additional GPIOs | Extend peripheral mapping flexibility; used for LCD segment/common, ADC channels, and timer inputs |
| NRST | Reset input | Active-low reset with internal pull-up; supports external reset button or supervisor IC integration |
| BOOT0 | Boot configuration | Defines boot source (system memory, flash, or SRAM) at power-on; requires external pull-down for normal flash execution |
| SWDIO / SWCLK | Debug interface | Serial Wire Debug (SWD) pins for programming and real-time debugging without JTAG overhead |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables sub-µA low-power modes with configurable wakeup sources (5 pins in Stop/Shutdown) and 4 µs wake time from Stop |
| ART Accelerator™ | Eliminates flash wait states at 80 MHz, sustaining 100 DMIPS without external cache or SRAM code relocation |
| Integrated LCD controller | Drives up to 8×40 segments with built-in step-up converter - eliminates external bias supply in portable displays |
| TSC with 21 channels | Supports robust touchkey, linear slider, and rotary encoder implementation using self-capacitance measurement |
| Dual voltage regulation | On-chip LDO + external SMPS interface allows system-level efficiency optimization: 36 µA/MHz vs. 84 µA/MHz (LDO-only) |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition and local analytics in coin-cell-powered wristband. IC Role / Device Role / Timing Role: Main controller executing sensor fusion algorithms, managing BLE connectivity via UART, and driving segmented LCD display. Use Value: 280 nA Standby-with-RTC enables multi-week battery life; 12-bit ADC with 5 Msps sampling captures high-fidelity biosignals without external amplifiers. | Use Scenario: Battery-backed electricity meter with tamper detection, pulse counting, and infrared communication. IC Role / Device Role / Timing Role: System-on-chip handling metrology calculations, RTC-based billing intervals, IR data transmission (IRTIM), and LCD UI updates. Use Value: Integrated RTC with HW calendar and calibration eliminates external timekeeping IC; 8 nA Shutdown mode preserves battery during long idle periods. |
| Industrial Wireless Sensor Node | Portable Diagnostic Tool |
Use Scenario: LoRaWAN edge node collecting temperature, humidity, and vibration data in factory environments. IC Role / Device Role / Timing Role: Data aggregator with CAN interface to legacy machinery, LPUART wake-up for low-latency alerts, and quad-SPI for external FRAM logging. Use Value: LPUART wake-up from Stop 2 mode reduces average current to <2 µA; CAN 2.0B interface enables direct connection to PLC networks without level-shifting. | Use Scenario: Handheld ultrasound or point-of-care blood analyzer requiring precise analog front-end control and real-time display. IC Role / Device Role / Timing Role: Real-time signal processor managing ADC sampling, DAC waveform generation, op-amp PGA gain switching, and LCD refresh timing. Use Value: Single-chip integration of 12-bit ADC + dual DAC + op-amp + LCD controller reduces BOM count by ≥7 components versus discrete solutions. |
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 |
|---|---|---|---|
| STM32L433VCT6 | LQFP100 package (100 pins); adds 16 more GPIOs and 2 additional ADC channels | Suitable for designs requiring expanded peripheral routing or higher channel-count analog acquisition | Select when pin count >64 is needed; same flash/SRAM/peripheral spec but larger footprint |
| STM32L432KCU6 | Smaller 32-pin UFQFPN; 256 KB flash but only 64 KB SRAM; no LCD or TSC; USB only | Targeted at compact USB-C accessories or firmware-upgradable modules where display/touch are unnecessary | Choose for minimal footprint and cost-sensitive USB endpoint designs lacking display or capacitive sensing needs |
Compared with STM32L433VCT6, the STM32L433RCT3 offers identical core/peripheral functionality in a smaller LQFP64 package - ideal for space-constrained designs. Versus STM32L432KCU6, it adds LCD, TSC, CAN, and full analog subsystems at the cost of 28 extra pins and slightly higher PCB area.
Availability
STM32L433RCT3 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic tools requiring stable component supply across extended product lifecycles.
Supply support for STM32L433RCT3 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-grade components.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, featuring advanced power gating, flexible clock trees, and integrated analog peripherals for sensor-centric edge devices.
FAQ
What is the maximum operating temperature for the STM32L433RCT3?
The STM32L433RCT3 is rated for operation from –40 °C to +105 °C ambient temperature. This extended industrial temperature range is validated per ST's production test flow and supports deployment in enclosed enclosures or outdoor metering applications without active cooling.
Does the STM32L433RCT3 support external SMPS control?
Yes - the device includes dedicated VDD12 and VDD12_IO pins to interface with an external switched-mode power supply. When enabled, SMPS operation reduces active-mode current consumption to 36 µA/MHz (vs. 84 µA/MHz in LDO mode), significantly extending battery life in always-on applications.
Can the integrated LCD controller drive graphic displays?
No - the LCD controller supports only static or multiplexed segment-based displays (up to 8×40 or 4×44 segments). It does not support pixel-addressable graphic LCDs or TFT panels. For graphical UIs, external display controllers or higher-tier MCUs with parallel RGB interfaces are required.
Is the STM32L433RCT3 pin-compatible with other STM32L433 variants?
Within the same LQFP64 package (e.g., STM32L433RBT6, STM32L433RCT6), pinouts are fully compatible. However, the 'C' suffix denotes 256 KB flash and 'T3' specifies the 105 °C temperature grade - substituting a 'B' (192 KB flash) or 'T6' (125 °C) variant requires firmware and thermal validation due to memory and derating differences.
STM32L433RCT3 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
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L433RCT3 FAQ
1.How can I place an order for STM32L433RCT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433RCT3 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 STM32L433RCT3 reliable?
The price and inventory of STM32L433RCT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433RCT3 is usually 5 days.
3.What payment methods are accepted for STM32L433RCT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433RCT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433RCT3?
STM32L433RCT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433RCT3 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 STM32L433RCT3?
For technical support, including STM32L433RCT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433RCT3 requirements.
6.How does Aetrix verify that STM32L433RCT3 is sourced from the original manufacturer or authorized distributors?
All STM32L433RCT3 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 STM32L433RCT3 meets industry standards.
7.What is the process for return or replacement of STM32L433RCT3?
All STM32L433RCT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433RCT3, 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 STM32L433RCT3 part is unused and in its original packaging.
Return procedure for STM32L433RCT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L433RCT3 Tags
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