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STMicroelectronics STM32L443RCI3
- Part No.:
- STM32L443RCI3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA, WLCSP
- Datasheet:
-
STM32L443RCI3.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,673
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Product details
Overview
STM32L443RCI3 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, AES hardware accelerator, and analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DACs, op-amp, and two ultra-low-power comparators. It targets battery-powered portable medical devices, smart meters, and industrial sensors requiring long runtime and mixed-signal integration.
For engineers reviewing the STM32L443RCI3 datasheet, STM32L443RCI3 pinout, STM32L443RCI3 application, or STM32L443RCI3 equivalent, key selection criteria include its 8 nA shutdown current, 280 nA standby-with-RTC, 1.0 µA Stop 2 mode, 21 capacitive sensing channels, and UFBGA64 (6 × 6 mm) package with 57 I/Os - all validated for sub-100 µA/MHz active power efficiency in real-time sensor fusion workloads.
Technical Context
The STM32L443RCI3 implements 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 proprietary code readout protection. Its FlexPowerControl architecture supports seven low-power modes, including Shutdown (8 nA), Standby (28 nA), and Stop 2 (1.0 µA), each with configurable wakeup sources and voltage scaling.
It integrates dual PLLs - one for system clock/USB/audio and another for ADC - alongside a dedicated interconnect matrix routing 17 communication interfaces (including CAN 2.0B, SAI, SDMMC, and SWPMI) to 14-channel DMA without CPU intervention. The analog subsystem operates on independent supply rails, supporting simultaneous high-speed conversion and low-noise signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS, DSP instructions, MPU |
| Memory | 256 KB flash (single-bank, readout protected), 64 KB SRAM (16 KB with parity) |
| Low-Power Modes | Shutdown: 8 nA; Standby: 28 nA; Standby+RTC: 280 nA; Stop 2: 1.0 µA |
| Analog Peripherals | 1× 12-bit ADC @ 5 Msps (16-bit oversampling); 2× 12-bit DAC; 1× op-amp w/ PGA; 2× ultra-low-power comparators |
| Connectivity | USB 2.0 FS (crystal-less), CAN 2.0B, 4× USART, 1× LPUART, 3× SPI, 3× I²C, SAI, SDMMC, SWPMI, IRTIM |
| Package & I/O | UFBGA64 (6 × 6 mm, 0.5 mm pitch), 57 I/Os (most 5 V-tolerant) |
| Security & Crypto | AES-128/256 hardware accelerator, true RNG, 96-bit unique ID, CRC unit |
| Operating Range | 1.71–3.6 V supply; –40 °C to +105 °C ambient temperature |
Pinout & Package
STM32L443RCI3 is housed in a 6 × 6 mm, 0.5 mm pitch UFBGA64 package (ST part code A019), with 57 user-accessible I/Os, 4 power supply pins (VDD, VSS, VDDA, VSSA), 3 reset/debug pins (NRST, SWCLK, SWDIO), and dedicated RTC/LCD/USB/LCD bias pins. Pin functions are fully defined per DS11421 Rev 6 Section 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Main digital power / ground | Supplies core logic; decoupling required per layout guidelines for EMI and noise immunity |
| VDDA / VSSA | Analog domain power / ground | Isolates sensitive analog circuitry (ADC/DAC/OPAMP) from digital switching noise |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | 57 total GPIOs; most support 5 V tolerance, multiple alternate functions (AF0–AF15), and external interrupt capability |
| NRST | Active-low reset input | Asynchronous reset pin; internal pull-up; compatible with open-drain reset supervisors |
| SWCLK / SWDIO | Serial Wire Debug interface | Enables programming, debugging, and trace via 2-pin SWD; no JTAG required |
| PC13–PC15 | RTC oscillator inputs | Supports 32.768 kHz crystal connection for calendar RTC with calibration and alarm functions |
| PA11 / PA12 | USB D+/D− | Dedicated full-speed USB transceiver pins; support crystal-less operation using internal 48 MHz clock recovery |
| PF0–PF15 | LCD segment/common drivers | Drives up to 8×40 or 4×44 segments with integrated step-up converter for single-supply LCD bias |
Key Features
| Feature | Design Value |
|---|---|
| Batch Acquisition Mode (BAM) | Enables peripheral-triggered data capture (e.g., ADC→DMA→SRAM) while CPU remains in Stop mode, reducing active time by >60% in sensor polling loops |
| ART Accelerator™ | Eliminates flash wait states at 80 MHz, delivering consistent 1.25 DMIPS/MHz performance without cache-induced timing jitter |
| Capacitive Sensing Controller (TSC) | Supports 21 channels for touchkey, linear, and rotary sensors with built-in charge transfer and noise filtering - no external components needed |
| Ultra-Low-Power Comparators | Operate down to 1.62 V supply and consume <100 nA in active mode, enabling always-on threshold detection in battery-backed systems |
| Flexible Clock System | Dual PLLs + auto-trimmed MSI (±0.25%) + LSE-synchronized 48 MHz USB clock enable precise timing across USB, audio, and ADC domains without external crystals |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with local processing and Bluetooth LE transmission during periodic wake-ups. IC Role / Device Role / Timing Role: Primary MCU handling analog front-end control (ADC, OPAMP, COMP), real-time filtering, AES-encrypted data packaging, and USB/LPUART firmware updates. Use Value: 280 nA Standby+RTC enables multi-year battery life; BAM reduces average current to <5 µA during sensor sampling bursts. | Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, RF communication, and secure firmware updates. IC Role / Device Role / Timing Role: System controller managing metrology ADC, LCD driver (8×40), tamper-detection comparators, AES-secured OTA updates, and RTC-based billing cycles. Use Value: Integrated LCD controller eliminates external bias IC; 5 V-tolerant I/Os interface directly with legacy pulse sensors and optocouplers. |
| Industrial Wireless Sensor Node | Portable Diagnostic Device |
Use Scenario: Battery-powered vibration/temperature node transmitting time-stamped sensor logs over LoRaWAN or NB-IoT. IC Role / Device Role / Timing Role: Host processor for multi-axis accelerometer, thermistor, and humidity sensor interfacing via I²C/SPI; manages low-power scheduling and secure payload encryption. Use Value: Dual PLLs allow concurrent 80 MHz CPU operation and 48 MHz USB/SAI audio streaming; 1.0 µA Stop 2 mode extends field deployment beyond 10 years. | Use Scenario: Handheld ultrasound or point-of-care blood analyzer requiring analog signal chain control, touchscreen UI, and clinical data export. IC Role / Device Role / Timing Role: Mixed-signal SoC managing high-resolution ADC sampling, capacitive touch UI (21-channel TSC), LCD graphics rendering, and USB mass storage class for report export. Use Value: On-chip op-amp and PGA condition weak transducer signals; 16-bit oversampling achieves effective 14.5 ENOB for diagnostic-grade measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L433RCT6 | Same core/peripherals but 128 KB flash, no USB FS, no LCD controller, 48-pin LQFP64 package | Suitable for cost-sensitive sensor nodes without display or USB connectivity | Select when display, USB, or >128 KB code space is unnecessary - saves BOM cost and PCB area |
| STM32L552RET6 | ARM Cortex-M33 with TrustZone, 512 KB flash, 256 KB SRAM, enhanced crypto (AES-GCM, PKA), but higher active current (120 µA/MHz) | Required for certified secure boot, firmware attestation, or IoT edge node with remote attestation | Choose only when hardware-enforced security isolation and cryptographic acceleration beyond AES-128 are mandated |
Compared with STM32L433RCT6, the STM32L443RCI3 adds USB FS, LCD, and 128 KB more flash at identical low-power performance; versus STM32L552RET6, it trades TrustZone security for 40% lower active power and proven qualification in extended-temperature industrial deployments.
Availability
STM32L443RCI3 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across multi-year production cycles.
Supply support for STM32L443RCI3 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.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, featuring ST's FlexPowerControl architecture and ART Accelerator for energy-efficient real-time processing in battery-constrained environments.
FAQ
What is the maximum operating temperature rating for STM32L443RCI3?
The STM32L443RCI3 is qualified for operation from –40 °C to +105 °C ambient temperature, meeting industrial-grade reliability requirements. This rating is verified per DS11421 Rev 6 Section 6.3.1 and applies to all UFBGA64 variants, including the I3 suffix denoting extended temperature grade.
Does STM32L443RCI3 support crystal-less USB Full-Speed operation?
Yes - STM32L443RCI3 integrates a clock recovery system (CRS) that synchronizes its internal 48 MHz RC oscillator to USB SOF packets, enabling reliable crystal-less USB 2.0 Full-Speed communication without external timing components, as confirmed in Section 3.35 and Table 42 of DS11421 Rev 6.
How many capacitive sensing channels does STM32L443RCI3 provide?
The device integrates a dedicated Touch Sensing Controller (TSC) supporting up to 21 capacitive sensing channels, configurable for touchkey, linear, or rotary touch sensors. All channels share a common charge transfer architecture with built-in noise filtering and automatic recalibration, documented in Section 3.20 of the datasheet.
Is the LCD controller capable of driving segmented displays without external components?
Yes - the integrated LCD controller supports 8×40 or 4×44 segment configurations and includes an internal step-up converter to generate the required LCD bias voltage from a single 3.3 V supply, eliminating external charge pumps or DC-DC converters per Section 3.21 and Figure 132 in DS11421 Rev 6.
STM32L443RCI3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA, WLCSP
- 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:
STM32L443RCI3 FAQ
1.How can I place an order for STM32L443RCI3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L443RCI3 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 STM32L443RCI3 reliable?
The price and inventory of STM32L443RCI3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L443RCI3 is usually 5 days.
3.What payment methods are accepted for STM32L443RCI3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L443RCI3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L443RCI3?
STM32L443RCI3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L443RCI3 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 STM32L443RCI3?
For technical support, including STM32L443RCI3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L443RCI3 requirements.
6.How does Aetrix verify that STM32L443RCI3 is sourced from the original manufacturer or authorized distributors?
All STM32L443RCI3 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 STM32L443RCI3 meets industry standards.
7.What is the process for return or replacement of STM32L443RCI3?
All STM32L443RCI3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L443RCI3, 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 STM32L443RCI3 part is unused and in its original packaging.
Return procedure for STM32L443RCI3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L443RCI3 Tags
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