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STMicroelectronics STM32L443RCI6
- Part No.:
- STM32L443RCI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32L443RCI6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:11,328
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Product details
Overview
STM32L443RCI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 256 KB flash, 64 KB SRAM, and integrated LCD controller, USB FS, AES hardware accelerator, and analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DACs, op-amp with PGA, and two ultra-low-power comparators. It operates from 1.71–3.6 V across –40 °C to 85 °C and targets battery-powered portable medical devices, smart meters, and industrial sensors.
For engineers reviewing the STM32L443RCI6 datasheet, STM32L443RCI6 pinout, STM32L443RCI6 application, or STM32L443RCI6 equivalent, key selection criteria include its 280 nA Standby-with-RTC current, 4 µs wakeup from Stop mode, 83 fast I/Os (most 5 V-tolerant), and support for batch acquisition mode (BAM) in ultra-low-power sensing systems.
Technical Context
The STM32L443RCI6 integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at up to 80 MHz, delivering 100 DMIPS and 3.42 CoreMark/MHz. Its FlexPowerControl architecture supports seven low-power modes-including Shutdown (8 nA), Standby (28 nA), and Stop 2 (1.0 µA)-with hardware calendar RTC, LCD 8×40 controller, and capacitive touch sensing (21 channels).
It features dual PLLs for independent clock domains (system, USB, audio, ADC), a 17-interface communication suite (including USB 2.0 FS crystal-less, CAN 2.0B, SAI, SDMMC, and SWPMI), and security peripherals: AES-128/256 hardware accelerator, true random number generator, and 96-bit unique ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance |
| Memory | 256 KB single-bank Flash (with readout protection), 64 KB SRAM (16 KB with hardware parity) |
| Low-Power Performance | 280 nA Standby with RTC active; 4 µs wakeup from Stop mode |
| Analog Peripherals | 1× 12-bit ADC @ 5 Msps (16-bit oversampling), 2× 12-bit DACs, 1× op-amp with PGA, 2× ultra-low-power comparators |
| Connectivity | USB 2.0 FS crystal-less, CAN 2.0B, 4× USART, 1× LPUART, 3× SPI, 3× I²C FM+, SAI, SDMMC, SWPMI |
| Package & Pins | UFBGA64 (A019), 64-pin ball grid array, 0.5 mm pitch, 5 × 5 mm footprint, 83 fast I/Os (most 5 V-tolerant) |
| Operating Range | 1.71–3.6 V supply; –40 °C to +85 °C ambient temperature |
Pinout & Package
STM32L443RCI6 uses the UFBGA64 (A019) package: 5 × 5 mm, 0.5 mm ball pitch, 64-ball layout with 83 available I/Os (some shared across functions). Pin assignments follow ST's standard STM32L443 pin definition table (DS11421 Rev 6, Section 4), with dedicated VDD/VSS pairs, VBAT, VREF+, VREF–, and multiple power domains (VDDA, VDDIO2, VDDIO3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main digital power and ground | Dual-supply domain support; separate VDDA for analog; decoupling required per datasheet layout guidelines |
| VBAT | Backup power supply | Enables RTC and 32×32-bit backup registers in shutdown (200 nA draw) |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 83 total fast I/Os; most 5 V-tolerant; support 16 alternate functions (AF0–AF15) including USB, CAN, SAI, LCD |
| PC13–PC15 | RTC oscillator pins | Support external 32.768 kHz crystal (LSE); critical for calendar RTC accuracy and low-power wakeup |
| PD0–PD2 | LCD segment/common drivers | Enable 8×40 or 4×44 LCD display with integrated step-up converter; reduce external component count |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 8 nA Shutdown and 280 nA Standby-with-RTC-critical for >10-year battery life in metering |
| ART Accelerator™ | Eliminates flash wait states at 80 MHz, reducing dynamic power by ~15% vs non-accelerated M4 cores |
| Integrated LCD controller | Drives 8×40 segments without external bias or booster IC, saving PCB space and BOM cost |
| Capacitive touch sensing (TSC) | 21-channel hardware-accelerated touch engine supporting touchkey, linear, and rotary sensors-no external IC needed |
| AES-128/256 hardware accelerator | Offloads encryption/decryption from CPU, enabling secure firmware updates and data-at-rest protection in <100 µs |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with real-time display on segmented LCD and BLE transmission. IC Role / Device Role / Timing Role: Main system controller managing analog front-end sampling, LCD refresh, low-power timer-triggered sensor reads, and USB/LPUART wake-on-event comms. Use Value: 280 nA Standby-with-RTC enables multi-week operation on coin cell; integrated op-amp and ADC oversampling eliminate external signal conditioning. | Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, and periodic RF upload via LPUART or SAI-connected modem. IC Role / Device Role / Timing Role: Primary metrology processor handling pulse input capture, RTC-based billing intervals, LCD update, and AES-encrypted data packaging. Use Value: Hardware AES ensures regulatory compliance (e.g., DLMS/COSEM); 83 I/Os support isolated pulse inputs, LCD, and communication interfaces simultaneously. |
| Industrial Sensor Node | Portable Diagnostic Device |
Use Scenario: Battery-powered vibration/temperature node with local logging, LCD status display, and CAN bus reporting to gateway. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating ADC, TSC, and RTC data; CAN 2.0B interface handles deterministic fieldbus messaging. Use Value: Dual PLLs isolate CAN timing from USB/audio domains; 4 µs Stop-mode wakeup meets sub-10 ms event response requirements. | Use Scenario: Handheld ultrasound or glucose analyzer requiring analog signal chain control, real-time waveform rendering, and secure patient data export. IC Role / Device Role / Timing Role: Signal processing engine running DSP algorithms on Cortex-M4 FPU, driving SAI audio output and LCD graphics via DMA. Use Value: 64 KB SRAM with parity supports safe buffer management; integrated DACs and op-amp enable calibrated analog stimulus generation. |
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 package and core, but 128 KB Flash, no SAI, no SDMMC, no CAN | Suitable for simpler UI-driven devices without audio or fieldbus connectivity | Select when BOM cost reduction is prioritized over future feature scalability |
| STM32L552RET6 | ARMv8-M TrustZone, 512 KB Flash, 256 KB SRAM, higher security, 1.27 µA Stop 2 | Required for PSA Level 3 certified designs needing secure boot and runtime isolation | Choose only if hardware-enforced security and larger memory are mandatory |
Compared with STM32L433RCT6, the STM32L443RCI6 adds SAI, CAN, SDMMC, and 128 KB more Flash-enabling richer connectivity and firmware flexibility. Versus STM32L552RET6, it trades TrustZone and higher security for lower cost and proven ultra-low-power behavior in legacy-certified designs.
Availability
STM32L443RCI6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial sensor nodes, and portable diagnostic devices requiring stable component supply across long-lifecycle deployments.
Supply support for STM32L443RCI6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong focus on energy efficiency and industrial reliability.
The STM32L4 series is designed for ultra-low-power embedded applications demanding extended battery life, rich analog integration, and robust real-time performance-targeting metering, healthcare, and IoT edge nodes.
FAQ
What is the maximum operating frequency and how is it achieved?
The STM32L443RCI6 achieves 80 MHz maximum CPU frequency using its Adaptive Real-time Accelerator (ART Accelerator™), which eliminates flash wait states through instruction prefetch and branch cache. This allows deterministic zero-wait-state execution directly from 256 KB flash memory, validated at full temperature and voltage range per DS11421 Rev 6.
Does STM32L443RCI6 support crystal-less USB operation?
Yes, STM32L443RCI6 integrates a USB 2.0 Full-Speed crystal-less solution using its internal 48 MHz RC oscillator with Clock Recovery System (CRS), eliminating the need for an external USB crystal while maintaining ±0.25% accuracy-confirmed in Section 3.34 and Table 42 of DS11421 Rev 6.
How many I/Os are available and what is their voltage tolerance?
STM32L443RCI6 provides up to 83 fast I/Os, with most pins 5 V-tolerant even when VDD is 1.8 V or 3.3 V. This is explicitly specified in Section 3.12 and Table 19 of DS11421 Rev 6, enabling direct interfacing with legacy 5 V peripherals without level shifters.
What LCD configurations does the integrated controller support?
The STM32L443RCI6 LCD controller supports either 8×40 or 4×44 segment configurations with integrated step-up converter, allowing direct drive of passive LCD glass without external charge pumps. Pin mapping for segment/common outputs is defined in Section 3.21 and Table 14 of DS11421 Rev 6.
STM32L443RCI6 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:
STM32L443RCI6 FAQ
1.How can I place an order for STM32L443RCI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L443RCI6 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 STM32L443RCI6 reliable?
The price and inventory of STM32L443RCI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L443RCI6 is usually 5 days.
3.What payment methods are accepted for STM32L443RCI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L443RCI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L443RCI6?
STM32L443RCI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L443RCI6 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 STM32L443RCI6?
For technical support, including STM32L443RCI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L443RCI6 requirements.
6.How does Aetrix verify that STM32L443RCI6 is sourced from the original manufacturer or authorized distributors?
All STM32L443RCI6 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 STM32L443RCI6 meets industry standards.
7.What is the process for return or replacement of STM32L443RCI6?
All STM32L443RCI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L443RCI6, 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 STM32L443RCI6 part is unused and in its original packaging.
Return procedure for STM32L443RCI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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