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STMicroelectronics STM32L433RBY6TR
- Part No.:
- STM32L433RBY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA, WLCSP
- Datasheet:
-
STM32L433RBY6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,411
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Product details
Overview
STM32L433RBY6TR 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 delivers 36 µA/MHz in SMPS-run mode, 280 nA Standby with RTC, and supports capacitive touch sensing for battery-powered portable instrumentation and smart sensors.
For engineers reviewing the STM32L433RBY6TR datasheet, STM32L433RBY6TR pinout, STM32L433RBY6TR application, or STM32L433RBY6TR equivalent, key selection criteria include ultra-low-power mode timing behavior, LCD driver capability, USB crystal-less operation, and dual 12-bit DAC channel availability in UFBGA64 packaging.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, paired with a memory protection unit (MPU) and dual PLLs-one dedicated to USB clock recovery. Its power architecture includes configurable voltage scaling (VOS), external SMPS interface (VDD12), and FlexPowerControl supporting eight low-power modes including Stop 2 with 4 µs wakeup.
Analog subsystems include a 12-bit 5 Msps ADC with hardware oversampling (up to 16-bit), two 12-bit DACs with sample-and-hold, one rail-to-rail op-amp with programmable gain amplifier (PGA), and two ultra-low-power comparators-all supplied from independent analog rails for noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP and control algorithms without external co-processor |
| Memory | 256 KB flash (single-bank, code readout protected), 64 KB SRAM (16 KB with parity) - supports secure firmware storage and robust data buffering |
| Power Consumption | 36 µA/MHz @ 3.3 V in SMPS mode - reduces battery drain in always-on sensor nodes and wearable devices |
| Low-Power Modes | 280 nA Standby with RTC + 32×32-bit backup registers - maintains timekeeping and critical state during multi-year battery operation |
| Analog Peripherals | 1× 12-bit 5 Msps ADC, 2× 12-bit DAC, 1× op-amp with PGA, 2× comparators - enables closed-loop analog signal conditioning without external components |
| Connectivity | USB 2.0 FS crystal-less, CAN 2.0B, 4× USART, 3× I²C, LPUART, SAI, SWPMI - supports mixed wired/wireless edge-node communication topologies |
| LCD Driver | 8×40 or 4×44 segment drive with integrated step-up converter - drives segmented displays directly from single 3.3 V supply |
| Package | UFBGA64 (5 × 5 mm, 0.5 mm pitch, A019 marking) - enables compact PCB layout for space-constrained IoT endpoints |
Pinout & Package
STM32L433RBY6TR is housed in a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package with 0.5 mm ball pitch and 5 mm × 5 mm body size, compliant with ECOPACK2 environmental standards. Pin functions are validated per STMicroelectronics datasheet DS11449 Rev 8, Section 4 "Pinouts and pin description".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power/ground | Dual-supply domain: VDD powers digital core and I/O; VSS provides reference return path |
| VDDA, VSSA | Analog power/ground | Isolated analog supply pins reduce noise coupling into ADC/DAC/OPAMP circuits |
| VBAT | Backup power input | Supplies RTC and 32×32-bit backup registers during main power loss (down to 1.65 V) |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/O | Up to 83 fast I/Os; most 5 V-tolerant - simplifies level-shifting in mixed-voltage systems |
| PA9/PA10 | USB_DM/USB_DP | Crystal-less USB 2.0 Full-Speed interface - eliminates external 48 MHz crystal and matching network |
| PC13 | RTC_OUT | Dedicated output for RTC calibration or alarm pulse - enables precise time-synchronized wakeups |
| PF10 | LCD_VLCD | Output of internal step-up converter for LCD bias - drives up to 44-segment displays without external charge pump |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Eight configurable low-power modes including Stop 2 (1.0 µA) and Shutdown (8 nA) - extends battery life in intermittent-sensing applications |
| ART Accelerator™ | Zero-wait-state execution from flash at 80 MHz - eliminates external RAM for deterministic real-time response |
| Integrated SMPS interface | VDD12 pin accepts regulated 1.05–1.15 V from external DC-DC converter - improves system efficiency over LDO-only designs |
| Capacitive touch sensing | 21-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive HMI without overlay controllers |
| True random number generator (RNG) | NIST SP800-90B compliant entropy source - satisfies cryptographic key generation requirements in secure boot and TLS stacks |
| Firewall and ROP protection | Hardware-enforced memory access control and readout protection level 2 - prevents unauthorized firmware extraction or tampering |
Applications
| Smart Wearable Sensor Hub | Portable Medical Diagnostic Device |
|---|---|
Use Scenario: Continuous ECG/SpO₂ monitoring with Bluetooth LE telemetry and OLED display. IC Role / Device Role / Timing Role: Main application processor managing sensor acquisition, real-time filtering, USB charging negotiation, and LCD refresh at 60 Hz. Use Value: 280 nA Standby with RTC preserves session state between measurements; dual DACs generate precision reference voltages for analog front-end calibration. | Use Scenario: Handheld blood glucose meter with capacitive touch UI, SD card logging, and IR thermal sensor interface. IC Role / Device Role / Timing Role: System-on-chip controller handling touch sensing, 12-bit ADC sampling, SDMMC file writes, and LPUART diagnostics output. Use Value: 21-channel TSC enables bezel-free buttonless design; 36 µA/MHz SMPS-run mode extends alkaline battery life beyond 12 months. |
| Industrial Wireless Node | Energy Harvesting Remote Monitor |
Use Scenario: LoRaWAN-connected temperature/humidity node powered by solar cell and supercapacitor. IC Role / Device Role / Timing Role: Low-duty-cycle host managing periodic ADC reads, CAN bus gateway to legacy equipment, and USB firmware updates. Use Value: Crystal-less USB allows field reprogramming without crystal replacement; CAN 2.0B interface enables retrofit into existing factory automation networks. | Use Scenario: Self-powered environmental sensor using piezoelectric vibration harvester and thin-film battery. IC Role / Device Role / Timing Role: Energy-aware controller entering Shutdown mode (8 nA) between 10-minute measurement cycles, waking via LSE-calibrated LPTIM2. Use Value: 4 µs wakeup from Stop mode minimizes active time; internal 32 kHz RC (±5%) eliminates external crystal for cost-sensitive deployments. |
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), no integrated SMPS interface, same peripheral set | Better suited for prototyping and manual soldering; lacks VDD12 pin for external DC-DC optimization | Select when board space permits larger footprint and external SMPS integration is unnecessary |
| STM32L476RGT6 | Higher flash (1 MB), added Chrom-ART accelerator, no LCD controller, 1.14 µA Stop 2 mode | Targeted at graphical HMI with TFT displays; lacks segment LCD driver and step-up converter | Choose for color GUI applications requiring higher memory and graphics throughput, not segment-based displays |
Compared with STM32L433RCT6, the RBY6TR offers superior energy efficiency in SMPS-coupled designs and smaller form factor; versus STM32L476RGT6, it trades graphics capability for integrated LCD driving and lower static current in segment-display use cases.
Availability
STM32L433RBY6TR is available at Aetrix Electronics and suitable for smart wearables, portable medical diagnostics, industrial wireless nodes, and energy harvesting remote monitors requiring stable component supply across extended product lifecycles.
Supply support for STM32L433RBY6TR 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-grade components since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with emphasis on battery longevity, secure firmware execution, and integrated analog peripherals for sensor-centric designs.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32L433RBY6TR operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and ART Accelerator™, achieving 100 DMIPS (Dhrystone 2.1). This performance level is sustained across full voltage and temperature ranges with zero-wait-state flash execution enabled.
Does this MCU support crystal-less USB operation?
Yes - the STM32L433RBY6TR 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 while maintaining ±0.25% accuracy required for USB compliance.
What LCD configurations does the integrated controller support?
The built-in LCD controller supports either 8 commons × 40 segments or 4 commons × 44 segments, with an integrated step-up converter (VLCD) capable of generating up to 4.9 V from a 3.3 V supply - enabling direct drive of passive segment displays without external boost circuitry.
How many low-power modes are available and what is the lowest current draw?
The MCU offers eight low-power modes. The lowest active-retention mode is Shutdown at 8 nA (with five wakeup pins enabled); Standby with RTC consumes 280 nA, and Stop 2 mode draws 1.0 µA - all verified per DS11449 Rev 8 electrical characteristics tables.
STM32L433RBY6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA, WLCSP
- Series:
- STM32L4
- Packaging:
- Tape & Reel (TR)
- 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:
- 128KB (128K 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:
STM32L433RBY6TR FAQ
1.How can I place an order for STM32L433RBY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433RBY6TR 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 STM32L433RBY6TR reliable?
The price and inventory of STM32L433RBY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433RBY6TR is usually 5 days.
3.What payment methods are accepted for STM32L433RBY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433RBY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433RBY6TR?
STM32L433RBY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433RBY6TR 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 STM32L433RBY6TR?
For technical support, including STM32L433RBY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433RBY6TR requirements.
6.How does Aetrix verify that STM32L433RBY6TR is sourced from the original manufacturer or authorized distributors?
All STM32L433RBY6TR 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 STM32L433RBY6TR meets industry standards.
7.What is the process for return or replacement of STM32L433RBY6TR?
All STM32L433RBY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433RBY6TR, 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 STM32L433RBY6TR part is unused and in its original packaging.
Return procedure for STM32L433RBY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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