My Inquiry
My Account
STMicroelectronics STM32L433RCI3
- Part No.:
- STM32L433RCI3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32L433RCI3.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:10,606
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32L433RCI3 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, delivering 100 DMIPS at 80 MHz, featuring 256 KB flash, 64 KB SRAM, USB FS, LCD controller, and integrated SMPS support. It operates from 1.71–3.6 V across –40 °C to 105 °C and targets battery-powered portable medical devices, smart sensors, and energy-harvesting IoT endpoints.
For engineers reviewing the STM32L433RCI3 datasheet, STM32L433RCI3 pinout, STM32L433RCI3 application, or STM32L433RCI3 equivalent, key selection criteria include its 36 µA/MHz SMPS-enabled run mode, 280 nA standby-with-RTC current, 12-bit ADC (5 Msps), dual DACs, and UFBGA64 package compatibility with space-constrained PCB layouts.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash memory and a flexible power architecture with multiple low-power modes (Shutdown: 8 nA, Stop 2: 1.0 µA, Standby with RTC: 280 nA). Its interconnect matrix decouples bus masters for concurrent peripheral access without arbitration stalls.
Clock system includes dual PLLs (system/USB/audio), internal 48 MHz RC with clock recovery, and hardware-calibrated LSE-driven auto-trimming for ±0.25% accuracy. Analog subsystem features one 12-bit ADC with hardware oversampling up to 16-bit, two 12-bit DACs, one op-amp with PGA, and two ultra-low-power comparators-all with independent supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance |
| Memory | 256 KB flash (single-bank, code readout protection), 64 KB SRAM (16 KB with parity) |
| Power Consumption | 36 µA/MHz in SMPS-run mode @3.3 V; 280 nA Standby with RTC active |
| Analog Peripherals | 1× 12-bit ADC (5 Msps, 200 µA/Msps), 2× 12-bit DACs, 1× op-amp with PGA, 2× comparators |
| Connectivity | USB 2.0 FS (crystal-less), CAN 2.0B, 4× USART, 1× LPUART, 3× I²C, 3× SPI, Quad-SPI, SAI, SWPMI |
| Package | UFBGA64 (5 × 5 mm, 0.5 mm pitch, A019 marking), RoHS-compliant ECOPACK2 |
| Operating Range | –40 °C to +105 °C ambient; 1.71–3.6 V supply voltage |
Pinout & Package
STM32L433RCI3 is housed in 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 per ST documentation). The package supports automated optical inspection and fine-pitch routing for high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Dual-domain supply pins supporting separate analog/digital power routing and noise isolation |
| VDDA, VSSA | Analog power and ground | Independent analog domain supply enabling precision ADC/DAC operation with reduced digital switching noise |
| VBAT | Backup power input | Supplies RTC and 32×32-bit backup registers during main power loss; supports coin-cell battery connection |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | Up to 83 fast I/Os; most are 5 V-tolerant, configurable as GPIO, AF, or event inputs with wakeup capability |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external reset sources or debugger-initiated reset |
| SWCLK, SWDIO | Serial Wire Debug interface | Two-pin debug interface supporting full SWD protocol for programming, tracing, and real-time debugging |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 8 nA shutdown mode and 4 µs wake-up from Stop mode-critical for duty-cycled sensor nodes |
| ART Accelerator™ | Eliminates flash wait states at 80 MHz, reducing code latency and dynamic power in real-time control loops |
| Integrated SMPS support | External step-down converter interface reduces system-level power conversion losses vs. LDO-only designs |
| LCD controller | Drives 8×40 or 4×44 segments with integrated step-up converter-enables direct LCD bias without external charge pump |
| Capacitive touch sensing | 21-channel TSC supports touchkey, linear, and rotary sensors using hardware-accelerated acquisition |
Applications
| Wearable Health Monitor | Smart Gas Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with local processing and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Main application processor executing sensor fusion algorithms, managing USB/LPUART communication, and controlling LCD display. Use Value: 280 nA standby-with-RTC enables multi-week battery life; 12-bit ADC + hardware oversampling achieves clinical-grade signal resolution. | Use Scenario: Battery-powered CO/NH₃ detection unit with electrochemical sensor interfacing and wireless alert transmission. IC Role / Device Role / Timing Role: Signal conditioner, low-power scheduler, and CAN/UART gateway for fieldbus integration. Use Value: Dual 12-bit DACs calibrate sensor baselines; ultra-low-power comparators enable fast gas-threshold triggering with sub-µA quiescent current. |
| Energy-Harvesting Remote Controller | Industrial Panel Meter |
Use Scenario: Solar- or RF-harvested power management for HVAC remote control with tactile feedback and LCD UI. IC Role / Device Role / Timing Role: System-on-chip managing energy harvesting PMIC interface, capacitive touch sensing, and segmented LCD drive. Use Value: Batch Acquisition Mode (BAM) synchronizes sensor reads with harvest pulses; LCD controller eliminates external bias IC. | Use Scenario: DIN-rail mounted meter displaying real-time voltage/current harmonics with Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Data concentrator with dual ADC sampling, CRC-protected UART communication, and RTC-stamped logging. Use Value: 64 KB SRAM with parity ensures data integrity during brown-out events; CAN 2.0B supports industrial fieldbus interoperability. |
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, no BGA soldering requirement | Better suited for prototyping, manual rework, or legacy PCB footprints requiring leaded packages | Select when board assembly lacks BGA reflow capability or thermal dissipation constraints favor larger footprint |
| STM32L476RGT6 | Higher flash (1 MB), added Chrom-ART accelerator, no LCD controller, 14-bit ADC (2.4 Msps) | Targeted at graphics-rich HMI applications where display rendering outweighs segment LCD needs | Choose when GUI performance and extended memory supersede ultra-low-power LCD integration |
Compared with STM32L433RCT6, the RCI3 offers superior board-area efficiency and thermal performance in compact designs; versus STM32L476RGT6, it trades graphics capability for lower static power and integrated LCD drive-making it optimal for segment-display, battery-limited edge nodes.
Availability
STM32L433RCI3 is available at Aetrix Electronics and suitable for wearable health monitors, smart gas sensor nodes, energy-harvesting remote controllers, and industrial panel meters requiring stable component supply across long production lifecycles.
Supply support for STM32L433RCI3 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-milliwatt, with emphasis on battery longevity, secure firmware execution, and mixed-signal integration for IoT and portable industrial equipment.
FAQ
What is the maximum operating temperature for STM32L433RCI3?
The STM32L433RCI3 is rated for operation from –40 °C to +105 °C ambient temperature, validated per ST's industrial temperature grade specification. This rating applies to all electrical characteristics including flash endurance, ADC linearity, and RTC accuracy under sustained thermal stress.
Does STM32L433RCI3 support external SMPS control?
Yes-it provides dedicated VDD12 and VDD12_IO pins to interface with an external step-down DC-DC converter, enabling 36 µA/MHz run-mode current versus 84 µA/MHz in LDO mode. The SMPS must supply 1.1 V ±5% to VDD12, and the MCU automatically configures regulators and clocks upon detection.
How many pins support wakeup-from-Stop mode?
Five dedicated wakeup pins (WKUP1–WKUP5) are available, mapped to PA0, PC13, PC14, PC15, and PI8 per the datasheet. These pins retain functionality in Stop 2 and Standby modes and can trigger interrupt-based resume without full system reset.
Is the UFBGA64 package of STM32L433RCI3 compatible with standard reflow profiles?
Yes-the UFBGA64 (A019) package complies with IPC/JEDEC J-STD-020D moisture sensitivity level 3 and supports standard Pb-free reflow profiles (peak 260 °C, 10–30 sec above 217 °C). ST recommends stencil aperture ratio ≥0.66 and solder paste volume control to ensure void-free ball formation.
STM32L433RCI3 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L433RCI3 FAQ
1.How can I place an order for STM32L433RCI3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433RCI3 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 STM32L433RCI3 reliable?
The price and inventory of STM32L433RCI3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433RCI3 is usually 5 days.
3.What payment methods are accepted for STM32L433RCI3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433RCI3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433RCI3?
STM32L433RCI3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433RCI3 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 STM32L433RCI3?
For technical support, including STM32L433RCI3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433RCI3 requirements.
6.How does Aetrix verify that STM32L433RCI3 is sourced from the original manufacturer or authorized distributors?
All STM32L433RCI3 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 STM32L433RCI3 meets industry standards.
7.What is the process for return or replacement of STM32L433RCI3?
All STM32L433RCI3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433RCI3, 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 STM32L433RCI3 part is unused and in its original packaging.
Return procedure for STM32L433RCI3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L433RCI3 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
