My Inquiry
My Account
STMicroelectronics STM32L433RBI6
- Part No.:
- STM32L433RBI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32L433RBI6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,726
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32L433RBI6 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 IoT sensors, portable medical devices, and smart meters requiring sub-µA standby operation and high analog integration.
For engineers reviewing the STM32L433RBI6 datasheet, STM32L433RBI6 pinout, STM32L433RBI6 application, or STM32L433RBI6 equivalent, key selection criteria include its 28 nA Standby mode, 36 µA/MHz SMPS-enabled run efficiency, 12-bit ADC with 5 Msps, dual DACs, and UFBGA64 package compatibility with space-constrained PCB layouts.
Technical Context
The STM32L433RBI6 implements FlexPowerControl architecture with five low-power modes (Shutdown, Standby, Stop 2, Low-power Run, Run), enabling dynamic voltage scaling and external SMPS coordination. Its ART Accelerator™ delivers zero-wait-state execution from flash at 80 MHz, while the interconnect matrix decouples bus arbitration for deterministic peripheral access.
It integrates a full analog subsystem: one 12-bit ADC (5 Msps, hardware oversampling to 16-bit), two 12-bit DACs, one operational amplifier with programmable gain, two ultra-low-power comparators, and a 21-channel capacitive touch sensing controller - all with independent analog supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, 80 MHz max frequency (100 DMIPS) |
| Memory | 256 KB single-bank Flash (with readout protection), 64 KB SRAM (16 KB with parity) |
| Power Consumption | 28 nA Standby mode (5 wakeup pins), 36 µA/MHz run mode with external SMPS |
| Analog Peripherals | 1× 12-bit ADC (5 Msps), 2× 12-bit DACs, 1× OPAMP with PGA, 2× comparators |
| Connectivity | USB 2.0 FS (crystal-less), CAN 2.0B, 4× USART, 3× I²C, 3× SPI, LPUART, SAI, SWPMI |
| Package | UFBGA64 (5 × 5 mm, 0.5 mm pitch, A019 marking) |
| Operating Range | 1.71–3.6 V supply, –40 °C to +105 °C ambient temperature |
Pinout & Package
STM32L433RBI6 uses the UFBGA64 (A019) package: 5 mm × 5 mm, 0.5 mm ball pitch, 64 I/O balls in 9×9 array with corner balls omitted. Ball layout supports high-density routing and thermal dissipation via central ground pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O power supplies | Independent domains enable noise isolation; VDDA must be ≥ VDD for ADC/DAC stability |
| VSS, VSSA, VSSIO2 | Ground returns | Separate analog/digital grounds reduce coupling; mandatory star-point connection at PCB level |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | Up to 83 fast I/Os (most 5 V-tolerant); configurable as GPIO, AF, or event inputs |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–5.5 V logic levels |
| BOOT0 | Boot mode selection | High at reset enables system memory bootloader; requires external pull-down for main flash boot |
| VBAT | RTC/backup register supply | Accepts coin-cell or supercap; maintains RTC calendar and 32×32-bit registers in shutdown (200 nA) |
| OSC_IN/OSC_OUT | External crystal oscillator interface | Supports 4–48 MHz crystals; optional for HSE; LSE (32.768 kHz) required for RTC accuracy |
| USB_DP/USB_DM | USB 2.0 Full-Speed differential pair | Certified crystal-less operation; internal transceiver with suspend/resume detection |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 28 nA Standby and 84 µA/MHz LDO-run mode; SMPS mode reduces active current by 57% |
| ART Accelerator™ | Eliminates flash wait states at 80 MHz, delivering 3.42 CoreMark/MHz and deterministic real-time response |
| LCD controller | Drives 8×40 or 4×44 segments with integrated step-up converter - eliminates external bias supply |
| Capacitive touch sensing (TSC) | 21-channel hardware-accelerated acquisition supporting touchkey, linear, and rotary sensors without CPU load |
| True random number generator (RNG) | FIPS-compliant entropy source certified per ISO/IEC 19790; used for secure key generation and seeding |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with Bluetooth LE telemetry and multi-week battery life. IC Role / Device Role / Timing Role: Central MCU managing analog front-end (ADC, OPAMP, comparators), LCD display, USB programming, and low-power wireless co-processor interface. Use Value: 28 nA Standby and 36 µA/MHz SMPS-run mode extend CR2032 battery life beyond 18 months; integrated TSC enables buttonless UI. | Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, and PLC or RF mesh communication. IC Role / Device Role / Timing Role: Primary controller handling metrology ADC sampling, RTC-based billing intervals, LCD refresh, and secure firmware updates via USB or isolated UART. Use Value: Hardware parity on 16 KB SRAM ensures data integrity during power glitches; VBAT-backed RTC maintains accurate billing timestamps across outages. |
| Portable Diagnostic Device | Industrial Sensor Node |
Use Scenario: Handheld ultrasound or blood glucose analyzer requiring high-precision analog measurement and local data logging. IC Role / Device Role / Timing Role: Signal processor interfacing with 12-bit ADC (5 Msps), dual DACs for calibration waveform generation, and SDMMC for raw data storage. Use Value: 16-bit oversampling capability improves effective resolution to 14.5 ENOB; quad-SPI interface enables fast external flash expansion for firmware OTA. | Use Scenario: Wireless vibration/temperature node in predictive maintenance systems deployed in harsh factory environments. IC Role / Device Role / Timing Role: Edge intelligence unit performing FFT analysis on accelerometer data, CAN bus gateway to legacy machinery, and LPUART wake-up from Stop 2 mode. Use Value: 4 µs wakeup from Stop mode enables rapid response to transient events; CAN 2.0B interface ensures interoperability with existing industrial networks. |
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 |
|---|---|---|---|
| STM32L432KBU6 | Same core and peripherals but 256 KB flash reduced to 256 KB, 64 KB SRAM unchanged; UFBGA32 (32-pin) package only | Lacks LCD controller, USB FS, and one DAC channel; no TSC or SAI | Select when board space is critical and LCD/USB/touch are unnecessary |
| STM32L552RET6 | ARM Cortex-M33 with TrustZone, 512 KB flash, 256 KB SRAM, same UFBGA64 package; 38 µA/MHz SMPS run mode | Includes cryptographic accelerators (AES, PKA), secure boot, and enhanced tamper detection | Choose for applications requiring PSA Level 2 certification or secure firmware updates |
Compared with STM32L433RBI6, the STM32L432KBU6 sacrifices LCD, USB, and touch capability for smaller footprint, while the STM32L552RET6 adds hardware security and larger memory at higher cost and power - making STM32L433RBI6 optimal for balanced cost, integration, and ultra-low-power analog-rich designs.
Availability
STM32L433RBI6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable diagnostic devices, and industrial sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for STM32L433RBI6 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 analog integration, rich connectivity, and long battery life - optimized for IoT edge nodes, portable medical equipment, and energy-harvesting systems.
FAQ
What is the maximum operating frequency and corresponding performance metric of the STM32L433RBI6?
The STM32L433RBI6 operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and DSP extensions, achieving 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark® (3.42 CoreMark/MHz). Its ART Accelerator™ ensures zero-wait-state execution from flash, enabling deterministic real-time behavior without external RAM or cache penalties.
Does the STM32L433RBI6 support external SMPS, and how does it affect power consumption?
Yes, the STM32L433RBI6 supports external SMPS via dedicated VDD12 and VDD12_IO pins. In SMPS mode, active current drops to 36 µA/MHz - a 57% reduction versus 84 µA/MHz in LDO mode - significantly extending battery life in always-on applications like smart meters and wearables.
What LCD capabilities does the STM32L433RBI6 provide, and what external components are eliminated?
The STM32L433RBI6 integrates a full LCD controller supporting up to 8×40 or 4×44 segments with an on-chip step-up converter. This eliminates the need for external LCD bias generators, charge pumps, or external DC-DC converters, reducing BOM count and PCB area in portable displays such as medical handhelds and utility meters.
How many capacitive sensing channels does the STM32L433RBI6 support, and what sensor types are natively handled?
The STM32L433RBI6 provides 21 hardware-accelerated capacitive sensing channels via its Touch Sensing Controller (TSC), supporting touchkey, linear touch sliders, and rotary touch wheels without CPU intervention. It includes built-in acquisition control, filtering, and baseline tracking - enabling robust, low-power human-machine interfaces in battery-operated devices.
STM32L433RBI6 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:
- 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:
STM32L433RBI6 FAQ
1.How can I place an order for STM32L433RBI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433RBI6 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 STM32L433RBI6 reliable?
The price and inventory of STM32L433RBI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433RBI6 is usually 5 days.
3.What payment methods are accepted for STM32L433RBI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433RBI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433RBI6?
STM32L433RBI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433RBI6 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 STM32L433RBI6?
For technical support, including STM32L433RBI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433RBI6 requirements.
6.How does Aetrix verify that STM32L433RBI6 is sourced from the original manufacturer or authorized distributors?
All STM32L433RBI6 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 STM32L433RBI6 meets industry standards.
7.What is the process for return or replacement of STM32L433RBI6?
All STM32L433RBI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433RBI6, 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 STM32L433RBI6 part is unused and in its original packaging.
Return procedure for STM32L433RBI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L433RBI6 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…
