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STMicroelectronics STM32L433VCT3
- Part No.:
- STM32L433VCT3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32L433VCT3.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:351
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Product details
Overview
STM32L433VCT3 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 STM32L433VCT3 datasheet, STM32L433VCT3 pinout, STM32L433VCT3 application, or STM32L433VCT3 equivalent, key selection criteria include its 36 µA/MHz run current in SMPS mode, 280 nA standby-with-RTC power, 12-bit ADC (5 Msps), dual DACs, and LQFP64 package compatibility with legacy STM32L4 designs.
Technical Context
This MCU integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a memory protection unit (MPU) and dual PLLs for system/USB clock generation. Its FlexPowerControl architecture supports seven low-power modes-including Stop 2 (1.28 µA with RTC) and Shutdown (8 nA)-with sub-4 µs wake-up latency.
The analog subsystem includes a 12-bit ADC with hardware oversampling up to 16-bit resolution, two 12-bit DACs with sample-and-hold, one operational amplifier with programmable gain, and two ultra-low-power comparators-all operating from independent supplies to isolate noise-sensitive circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU and DSP instructions; enables real-time signal processing in sensor fusion and motor control without external co-processors. |
| Max Frequency | 80 MHz; achieves 100 DMIPS and 273.55 CoreMark®-sufficient for concurrent BLE stack + UI rendering on integrated LCD. |
| Flash / SRAM | 256 KB flash (single-bank, code readout protected), 64 KB SRAM (16 KB with parity); supports secure firmware updates and robust data logging buffers. |
| Power Consumption | 36 µA/MHz in SMPS-run mode; reduces battery load by >50% vs. LDO mode-critical for multi-year coin-cell operation. |
| ADC Performance | 12-bit @ 5 Msps, up to 16-bit via hardware oversampling; captures high-fidelity biopotential signals (e.g., ECG) with <200 µA/Msps quiescent draw. |
| Low-Power Modes | 280 nA Standby with RTC + 32×32-bit backup registers; maintains calendar time and critical state during deep sleep without external RTC. |
| Peripherals | USB 2.0 FS (crystal-less), LCD 8×40, 21-channel capacitive sensing, CAN 2.0B, SDMMC, SAI, and SWPMI; consolidates connectivity and HMI in compact wearable form factors. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK2 certified. Pin count and layout align with STM32L433VC variants for drop-in PCB reuse.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports dual-supply configuration: VDD (1.71–3.6 V) for digital core, VDDA (1.62–3.6 V) for analog peripherals-enables noise isolation. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | Up to 83 fast I/Os; most 5 V-tolerant-simplifies level-shifting with legacy peripherals and sensors. |
| PF0–PF15 | Additional GPIOs & alternate functions | Includes oscillator inputs (PH0/PH1), RTC backup (PC13–PC15), and LCD segment/common drivers (PB0–PB15, PC0–PC15). |
| PA9/PA10 | USB_DM / USB_DP | Certified crystal-less USB FS interface; eliminates external 48 MHz crystal and matching components-reduces BOM cost and board area. |
| PC13–PC15 | RTC oscillator & backup domain | Connects 32.768 kHz LSE crystal; powers RTC and 32×32-bit backup registers in VBAT mode (200 nA). |
| VBAT | Battery backup supply | Direct connection to coin cell; sustains RTC, backup registers, and tamper detection during main power loss. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 8 nA shutdown and 280 nA standby-with-RTC-extends battery life in intermittent-sensing applications like environmental monitors. |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz; eliminates performance penalty of internal flash latency-ideal for deterministic real-time control loops. |
| Integrated LCD controller | Drives 8×40 or 4×44 segments with built-in step-up converter; removes external bias generator and simplifies display integration in portable medical devices. |
| Capacitive touch sensing (TSC) | 21-channel hardware-accelerated touch engine supporting touchkey, linear, and rotary sensors-enables intuitive UI on space-constrained wearables. |
| Dual 12-bit DACs | Independent outputs with low-power sample-and-hold; generates precise analog waveforms for sensor calibration and actuator biasing without external DACs. |
Applications
| Portable Medical Monitor | Smart Energy Meter |
|---|---|
Use Scenario: Wearable ECG/SpO₂ monitor with OLED display and Bluetooth LE radio. IC Role / Device Role / Timing Role: Main application processor managing analog front-end sampling, LCD refresh, USB charging negotiation, and real-time RTOS scheduling. Use Value: 36 µA/MHz SMPS-run mode and 280 nA RTC-standby extend single-CR2032 battery life beyond 18 months in periodic measurement mode. | Use Scenario: DIN-rail mounted electricity meter with LCD, infrared comms, and tamper detection. IC Role / Device Role / Timing Role: System-on-chip handling metrology ADC interfacing, LCD driver, RTC calendar, and secure firmware updates over isolated RS-485. Use Value: Integrated 12-bit ADC (5 Msps) with hardware oversampling replaces external sigma-delta converter; VBAT-backed RTC ensures billing accuracy during mains outage. |
| Industrial Wireless Sensor Node | Low-Power Human-Machine Interface |
Use Scenario: Battery-powered vibration/temperature node transmitting LoRaWAN telemetry every 15 minutes. IC Role / Device Role / Timing Role: Central controller coordinating accelerometer sampling, crypto acceleration (RNG + CRC), LoRa transceiver SPI control, and deep-sleep scheduling. Use Value: 4 µs wake-up from Stop mode minimizes latency in event-triggered sampling; true RNG enables FIPS-compliant key generation for secure OTA updates. | Use Scenario: Touch-enabled thermostat with segmented LCD, ambient light sensing, and HVAC relay control. IC Role / Device Role / Timing Role: HMI processor running capacitive touch engine, LCD segment driver, temperature compensation algorithm, and PWM fan control. Use Value: 21-channel TSC supports slider + button + proximity sensing on single glass overlay; integrated op-amp with PGA conditions thermistor signals without external amplification. |
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 |
|---|---|---|---|
| STM32L433RCT6 | Same core/peripherals but in LQFP64 package with 256 KB flash and 64 KB SRAM; differs only in temperature grade (–40 to 85 °C vs. –40 to 105 °C). | Suitable for commercial-grade industrial controls where extended temperature is not required. | Select when full 105 °C operation is unnecessary and cost optimization is prioritized. |
| STM32L452RET6 | Higher flash (512 KB) and SRAM (256 KB), adds AES-256 crypto accelerator and USB PD support; no LCD controller or TSC. | Better suited for secure firmware update gateways or USB-C peripheral hubs requiring encryption. | Choose when cryptographic acceleration or larger code space outweighs integrated LCD/touch needs. |
Compared with STM32L433RCT6, the STM32L433VCT3 offers extended temperature range for harsh environments; versus STM32L452RET6, it trades crypto features for on-chip HMI peripherals-making it optimal for cost-sensitive, display-driven edge nodes.
Availability
STM32L433VCT3 is available at Aetrix Electronics and suitable for portable medical monitors, smart energy meters, industrial wireless sensor nodes, and low-power human-machine interfaces requiring stable component supply across long production lifecycles.
Supply support for STM32L433VCT3 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 automotive chips with emphasis on energy efficiency and industrial reliability.
The STM32L4 series targets ultra-low-power embedded applications demanding rich analog integration, secure firmware execution, and extended battery life-especially in portable healthcare, metering, and predictive maintenance systems.
FAQ
What is the maximum operating temperature for STM32L433VCT3?
The STM32L433VCT3 is rated for operation from –40 °C to +105 °C, validated per ST's industrial temperature grade specification. This allows deployment in enclosed enclosures near heat-generating components or outdoor metering installations without derating.
Does STM32L433VCT3 support external SMPS regulation?
Yes-it includes dedicated VDD12 and VDD12_IO pins to accept regulated 1.2 V from an external switching regulator, reducing active-mode current to 36 µA/MHz. The internal LDO can be disabled to maximize efficiency in battery-critical designs.
How many capacitive sensing channels does this MCU provide?
The STM32L433VCT3 integrates a hardware-accelerated Touch Sensing Controller (TSC) supporting up to 21 channels. These can be configured for touchkeys, linear sliders, or rotary wheels-enabling intuitive user interfaces without external touch controllers.
Is USB functionality available without an external crystal?
Yes-the USB 2.0 Full-Speed interface supports crystal-less operation using the internal 48 MHz RC oscillator with clock recovery system (CRS). This eliminates the need for a 48 MHz crystal and associated load capacitors, reducing BOM count and PCB footprint.
STM32L433VCT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-LQFP
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- 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:
- 83
- 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:
STM32L433VCT3 FAQ
1.How can I place an order for STM32L433VCT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433VCT3 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 STM32L433VCT3 reliable?
The price and inventory of STM32L433VCT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433VCT3 is usually 5 days.
3.What payment methods are accepted for STM32L433VCT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433VCT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433VCT3?
STM32L433VCT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433VCT3 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 STM32L433VCT3?
For technical support, including STM32L433VCT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433VCT3 requirements.
6.How does Aetrix verify that STM32L433VCT3 is sourced from the original manufacturer or authorized distributors?
All STM32L433VCT3 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 STM32L433VCT3 meets industry standards.
7.What is the process for return or replacement of STM32L433VCT3?
All STM32L433VCT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433VCT3, 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 STM32L433VCT3 part is unused and in its original packaging.
Return procedure for STM32L433VCT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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