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STMicroelectronics STM32L433RCI6
- Part No.:
- STM32L433RCI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32L433RCI6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:6,779
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Product details
Overview
STM32L433RCI6 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 targets battery-powered portable medical devices, smart sensors, and industrial IoT edge nodes requiring sub-µA standby operation and high analog integration.
For engineers reviewing the STM32L433RCI6 datasheet, STM32L433RCI6 pinout, STM32L433RCI6 application, or STM32L433RCI6 equivalent, key selection criteria include its 28 nA Standby mode (5 wakeup pins), 12-bit ADC at 5 Msps with hardware oversampling, dual 12-bit DACs, and UFBGA64 package compatibility with space-constrained PCB layouts.
Technical Context
The STM32L433RCI6 integrates 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 FlexPowerControl architecture for dynamic voltage scaling across seven low-power modes. Its interconnect matrix decouples bus masters to sustain concurrent peripheral activity without CPU intervention.
It features dual PLLs-one dedicated to USB clock recovery and another for system/ADC/audio-plus two ultra-low-power comparators, one operational amplifier with programmable gain amplifier (PGA), and a 17-interface communication suite including CAN 2.0B, LPUART, and crystal-less USB FS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, delivering 100 DMIPS @ 80 MHz for real-time signal processing in sensor fusion or motor control. |
| Flash / SRAM | 256 KB single-bank flash with readout protection; 64 KB SRAM (16 KB with hardware parity) for robust firmware storage and safety-critical data buffering. |
| Low-Power Performance | 28 nA Standby mode (5 wakeup pins); 1.28 µA Stop 2 mode with RTC; enables multi-year battery life in always-on sensing applications. |
| Analog Peripherals | 1× 12-bit ADC @ 5 Msps (200 µA/Msps), 2× 12-bit DACs, 1× OPAMP with PGA, 2× ultra-low-power comparators - supports closed-loop analog front-end design without external ICs. |
| Connectivity | USB 2.0 FS (crystal-less), CAN 2.0B, 4× USARTs (including LIN/IrDA), LPUART, 3× SPI, 3× I²C FM+, SAI, SDMMC - enables mixed wired/wireless edge node connectivity. |
| Package | UFBGA64 (5 × 5 mm, 0.5 mm pitch), A019 marking, ECOPACK2-compliant - suitable for compact wearable and portable instrumentation PCBs. |
| LCD Support | Integrated LCD controller supporting 8×40 or 4×44 segments with built-in step-up converter - eliminates external bias supply in segment LCD displays. |
Pinout & Package
STM32L433RCI6 uses a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package with 0.5 mm ball pitch and 5 × 5 mm body size (package code A019). Pin functions are defined per DS11449 Rev 8 Section 4, with dedicated VDD/VSS pairs for analog/digital domains, multiple VREF+/VREF− inputs for ADC/DAC reference stability, and dedicated LCD segment/common driver pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VSSA | Analog power supply / ground | Independent 1.71–3.6 V domain for ADC/DAC/OPAMP; requires local decoupling to maintain <1 LSB INL error. |
| 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 16 alternate functions including TIM, USART, SPI, I²C, and LCD segment drivers. |
| VBAT | Backup power input | Supplies RTC and 32×32-bit backup registers during main power loss; accepts 1.65–3.6 V for >10-year coin-cell operation. |
| PC13–PC15 | RTC oscillator pins | Support 32.768 kHz crystal (LSE) for calendar-accurate RTC operation with ±20 ppm stability over -40°C to +85°C. |
| PA11/PA12 | USB D+/D− | Crystal-less USB FS interface; internal clock recovery eliminates external 48 MHz crystal, reducing BOM count and board area. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 7 low-power modes (Shutdown to Run) with automatic voltage scaling and dynamic clock gating - reduces average system power by >70% vs. fixed-voltage MCUs. |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz via instruction/data prefetch and branch prediction - eliminates external SRAM dependency for deterministic real-time response. |
| Batch Acquisition Mode (BAM) | Allows peripherals (ADC, timers, DMA) to operate autonomously while CPU sleeps - captures sensor bursts at full rate without CPU wake-up latency. |
| Integrated LCD controller | Drives up to 320 segments (8×40) with internal step-up converter and contrast control - removes need for external LCD bias IC in portable display designs. |
| Capacitive touch sensing (TSC) | 21-channel hardware-accelerated touch controller supporting touchkey, linear, and rotary sensors - enables intuitive HMI with <5 µA active current and no external components. |
Applications
| Portable Medical Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Wearable ECG patch continuously acquiring biopotential signals and transmitting alerts via BLE gateway. IC Role / Device Role / Timing Role: Primary MCU managing analog front-end (ADC + OPAMP + PGA), real-time R-peak detection, RTC-stamped event logging, and USB/LPUART firmware updates. Use Value: 280 nA Standby with RTC and 28 nA true Standby enable >3-year battery life; 12-bit ADC oversampling achieves 16-bit effective resolution for clinical-grade waveform fidelity. | Use Scenario: Battery-powered gas/water meter reading ambient pressure, temperature, and flow via ultrasonic time-of-flight. IC Role / Device Role / Timing Role: System controller handling multi-sensor acquisition, CAN-based mesh network reporting, LCD display refresh, and tamper-detection logic. Use Value: Integrated CAN 2.0B and LCD controller reduce external component count; 8 nA Shutdown mode extends 10-year battery life with periodic wake-ups. |
| Industrial Predictive Maintenance Sensor | Wireless Building Automation Node |
Use Scenario: Vibration and temperature sensor node mounted on rotating machinery, performing FFT analysis and sending anomaly flags via LoRaWAN. IC Role / Device Role / Timing Role: Real-time vibration processing unit using DSP instructions, accelerometer interface (SPI/I²C), and secure firmware update via USB. Use Value: Cortex-M4 FPU and ART Accelerator deliver 3.42 CoreMark/MHz performance for embedded FFT; 36 µA/MHz SMPS-run mode minimizes energy per computation cycle. | Use Scenario: Occupancy and ambient light sensor controlling HVAC and lighting in commercial offices via BACnet/IP over Ethernet-to-LoRa bridge. IC Role / Device Role / Timing Role: Edge intelligence hub interfacing PIR, photodiode, and temperature sensors; managing dual-band wireless coexistence (LPUART + SPI LoRa + I²C Ethernet PHY). Use Value: 17 communication interfaces (including LPUART with Stop 2 wake-up) allow simultaneous protocol stacking; 5 V-tolerant I/Os simplify level-shifting with legacy building systems. |
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 | LQFP64 package (10 × 10 mm), higher thermal resistance (θJA = 49 °C/W vs. 39 °C/W for UFBGA64), same electrical specs. | Better suited for prototyping, manual soldering, or designs requiring through-hole-compatible footprint. | Select when thermal margin >15°C is available or when reworkability outweighs size constraints. |
| STM32L476RGT6 | Higher flash (1 MB), added Chrom-ART Accelerator, no LCD controller, 14-bit ADC (2.4 Msps), different pinout and peripheral mapping. | Targets graphics-rich HMI or higher-performance sensor fusion where LCD is unnecessary and memory headroom is critical. | Choose only if application requires >256 KB flash or advanced 2D graphics acceleration - not a drop-in replacement. |
Compared with STM32L433RCT6, the RCI6 offers superior thermal performance and 40% smaller footprint; versus STM32L476RGT6, it trades flash capacity and graphics capability for integrated LCD and lower static power - making it optimal for compact, display-equipped, battery-limited edge nodes.
Availability
STM32L433RCI6 is available at Aetrix Electronics and suitable for portable medical monitors, smart utility meters, industrial predictive maintenance sensors, and wireless building automation nodes requiring stable component supply across long product lifecycles.
Supply support for STM32L433RCI6 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, MEMS, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high analog integration, rich connectivity, and extended battery life - optimized for IoT endpoints, wearables, and industrial sensors where energy efficiency and peripheral consolidation are critical.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L433RCI6 operates at up to 80 MHz with 100 DMIPS performance. In Run mode with ART Accelerator enabled and power supplied by internal LDO, typical current is 84 µA/MHz at 3.3 V; with external SMPS, it drops to 36 µA/MHz - verified per DS11449 Rev 8 Table 26 and Table 27 under VDD = 3.3 V conditions.
Does STM32L433RCI6 support crystal-less USB operation?
Yes. The device integrates a USB 2.0 Full-Speed crystal-less solution using its internal 48 MHz clock recovery system (CRS), eliminating the need for an external 48 MHz crystal. This is confirmed in Section 3.33 of DS11449 Rev 8 and validated in USB compliance testing per USB-IF specifications.
How many wakeup pins are available in Standby mode, and what is their voltage tolerance?
STM32L433RCI6 provides five dedicated wakeup pins (PA0, PA2, PA5, PC13, PC14) in Standby mode, all supporting 5 V-tolerant logic levels per DS11449 Rev 8 Section 3.12 and Table 14. These pins retain interrupt capability even when VDD is unpowered, enabling reliable external-event triggering.
Is the LCD controller capable of driving segment-type displays without external components?
Yes. The integrated LCD controller supports 8×40 or 4×44 segment configurations and includes an internal step-up converter with programmable output voltage (2.3–4.2 V) and contrast control. No external bias generator or charge pump is required - confirmed in Section 3.21 and Figure 127 of DS11449 Rev 8.
STM32L433RCI6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L433RCI6 FAQ
1.How can I place an order for STM32L433RCI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433RCI6 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 STM32L433RCI6 reliable?
The price and inventory of STM32L433RCI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433RCI6 is usually 5 days.
3.What payment methods are accepted for STM32L433RCI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433RCI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433RCI6?
STM32L433RCI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433RCI6 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 STM32L433RCI6?
For technical support, including STM32L433RCI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433RCI6 requirements.
6.How does Aetrix verify that STM32L433RCI6 is sourced from the original manufacturer or authorized distributors?
All STM32L433RCI6 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 STM32L433RCI6 meets industry standards.
7.What is the process for return or replacement of STM32L433RCI6?
All STM32L433RCI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433RCI6, 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 STM32L433RCI6 part is unused and in its original packaging.
Return procedure for STM32L433RCI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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