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STMicroelectronics STM32G431CBT3
- Part No.:
- STM32G431CBT3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32G431CBT3.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,277
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Product details
Overview
STM32G431CBT3 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, operating up to 170 MHz (213 DMIPS), featuring 128 KB Flash with ECC, 32 KB SRAM (22 KB + 10 KB CCM), and integrated analog peripherals including dual 12-bit DACs (1 MSPS buffered), dual 16-bit ADCs (0.25 µs conversion), 3 op-amps, 4 comparators, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.
For engineers reviewing the STM32G431CBT3 datasheet, STM32G431CBT3 pinout, STM32G431CBT3 application, or STM32G431CBT3 equivalent, key selection considerations include its LQFP48 package, 5 V-tolerant I/Os, FDCAN support, UCPD interface for USB Type-C™ PD, and hardware-accelerated trigonometric/filter math functions essential for real-time control loops.
Technical Context
The STM32G431CBT3 implements a tightly coupled Arm Cortex-M4 core with FPU and Adaptive Real-Time (ART) Accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its memory subsystem includes 128 KB Flash with ECC and PCROP, 22 KB SRAM with parity on first 16 KB, and 10 KB CCM SRAM with parity - all accessible via multi-AHB bus matrix for concurrent peripheral access.
Analog integration centers on two independent 12-bit ADCs (up to 23 channels, hardware oversampling), four rail-to-rail comparators, three programmable-gain op-amps with full terminal access, and a voltage reference buffer (VREFBUF) supporting 2.048 V / 2.5 V / 2.9 V outputs - coordinated by dedicated timers (TIM1/TIM8) with dead-time generation and emergency stop for advanced motor control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 170 MHz max frequency (213 DMIPS), ART Accelerator for zero-wait-state Flash execution |
| Memory | 128 KB Flash with ECC and PCROP; 22 KB SRAM (16 KB with parity); 10 KB CCM SRAM (parity-enabled) |
| Analog Peripherals | Dual 12-bit DACs (2 buffered @ 1 MSPS, 2 unbuffered @ 15 MSPS); dual 16-bit ADCs (0.25 µs conversion, 23 ch) |
| Timers | 14 timers including 2x 16-bit advanced motor control timers (TIM1/TIM8), 1x 32-bit general-purpose timer, LPTIM1 |
| Communication | FDCAN (flexible data rate), 4x USART/UART, 3x I²C (Fast Mode Plus), 3x SPI, USB 2.0 FS, UCPD, SAI, LPUART |
| Math Acceleration | CORDIC engine for sin/cos/tan/sqrt/log/exp; FMAC for FIR/IIR filter computation - offloads CPU in real-time control |
| Supply & Power | 1.71–3.6 V operation; POR/PDR/BOR; PVD; sleep/stop/standby/shutdown modes; RTC with VBAT backup |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; 38 general-purpose I/Os (33 5 V-tolerant), 3x VDD/VSS pairs, dedicated VDDA/VSSA for analog domain, VREF+/- for ADC/DAC reference, and BOOT0 for boot mode selection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS (×3) | Core & I/O power supply/ground | Independent domains reduce noise coupling; decoupling required per datasheet layout guidelines |
| VDDA, VSSA | Analog domain supply/ground | Isolated analog power path ensures ADC/DAC accuracy; must be filtered and routed separately |
| VREF+ | ADC/DAC reference input | Accepts external reference (0–3.6 V) or internal VREFBUF output; enables precise ratiometric measurements |
| PA0–PA15, PB0–PB15, PC0–PC15, PD2 | General-purpose I/Os | 38 GPIOs total; 33 support 5 V tolerance; all mappable to EXTI for wake-up or interrupt handling |
| BOOT0 | Boot mode selection | High at reset selects system memory bootloader; low selects user Flash - critical for firmware recovery |
| NRST | Active-low reset input | Asynchronous reset signal; internal pull-up; compatible with push-button or supervisor IC assertion |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric/logarithmic computation in <100 ns - eliminates software library overhead in motor FOC or sensor fusion |
| FMAC unit | Dedicated 32-bit filter engine supporting 16-tap FIR at 170 MHz - enables real-time digital power control without CPU load |
| Advanced motor timers | TIM1/TIM8 with 8-channel PWM, programmable dead time, and emergency stop input - supports 3-phase BLDC/PMSM drives |
| UCPD interface | Integrated USB Type-C™ Power Delivery controller - enables bidirectional power negotiation and role swapping without external IC |
| Op-amp PGA mode | Three rail-to-rail op-amps with selectable gain (1–20×) and full pin access - allows configurable signal conditioning for current/voltage sensing |
Applications
| Industrial Motor Control | Digital Power Supply |
|---|---|
|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase BLDC motors in HVAC blowers and pumps. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, generating six PWM signals with synchronized dead time, sampling current via dual ADCs, and managing thermal protection. Use Value: CORDIC computes sine/cosine for Park/Clarke transforms in <1 µs; FMAC handles PI loop filtering; TIM1/TIM8 deliver precise 20 kHz PWM with <1 ns jitter. |
Use Scenario: 1–3 kW AC-DC and DC-DC converters with adaptive voltage regulation and fault logging. IC Role / Device Role / Timing Role: Digital power controller managing PWM duty cycle, monitoring input/output voltage/current, and communicating status via UART/I²C. Use Value: Dual 16-bit ADCs sample 4 channels simultaneously at 2 Msps; VREFBUF provides stable 2.5 V reference; UCPD enables USB-C PD negotiation for variable output voltage. |
| Smart Sensor Hub | USB-C Peripheral Interface |
|
Use Scenario: Multi-sensor node aggregating temperature, pressure, and current data for predictive maintenance in factory automation. IC Role / Device Role / Timing Role: Sensor fusion hub with analog front-end (op-amps, comparators), local processing, and wireless gateway interface (via UART/LPUART). Use Value: Three op-amps condition differential sensor signals; internal temperature sensor and VREFINT enable self-calibration; LPUART maintains connectivity during low-power sleep. |
Use Scenario: Embedded device (e.g., docking station, monitor) requiring USB-C port power management and data tunneling. IC Role / Device Role / Timing Role: USB Type-C controller managing CC line detection, VCONN sourcing, power role negotiation, and alternate mode signaling. Use Value: Integrated UCPD peripheral replaces discrete USB-C controller; supports USB PD 3.0 with programmable policy engine; reduces BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G431KBT3 | LQFP32 package (32-pin), 26 GPIOs, no UCPD, reduced timer count (no TIM8), same core/peripherals otherwise | Suitable for space-constrained designs without USB-C PD or advanced motor control requirements | Select when board area is critical and UCPD/motor timer features are unnecessary - saves cost and layout complexity |
| STM32G474RET6 | LQFP64 package, 512 KB Flash, 128 KB SRAM, additional ADC/DAC channels, enhanced crypto (AES, PKA), no UCPD | Targeted at higher-complexity applications like secure industrial gateways or multi-axis motion controllers | Choose for larger code footprint, cryptographic needs, or expanded analog I/O - not a drop-in replacement due to pinout and feature divergence |
Compared with STM32G431KBT3, the STM32G431CBT3 adds UCPD and TIM8 for USB-C PD and 3-phase motor control; versus STM32G474RET6, it trades Flash/SRAM capacity and crypto for smaller footprint and integrated power delivery - making it optimal for cost-sensitive, analog-rich edge nodes.
Availability
STM32G431CBT3 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and smart sensor hub applications requiring stable component supply, long-term manufacturability, and qualified automotive-grade variants (where applicable).
Supply support for STM32G431CBT3 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32G4 series targets high-performance, analog-intensive embedded applications - combining real-time control capability, mathematical acceleration, and USB-C power delivery in a single-chip solution for next-generation power electronics and motor drives.
FAQ
What is the maximum operating frequency and corresponding performance metric of the STM32G431CBT3?
The STM32G431CBT3 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1). This is achieved using the Arm Cortex-M4 core with FPU and Adaptive Real-Time (ART) Accelerator, which enables zero-wait-state execution from Flash memory - verified across temperature and voltage ranges per DS12589 Rev 6.
Does the STM32G431CBT3 support USB Type-C™ Power Delivery, and how is it implemented?
Yes - the STM32G431CBT3 integrates a dedicated USB Type-C™ and Power Delivery (UCPD) controller compliant with USB PD 3.0. It handles CC line detection, VCONN sourcing, power role negotiation (SRC/SNK), and alternate mode signaling without external components, using internal analog comparators and programmable logic per Section 3.35 of the datasheet.
How many analog-to-digital converter (ADC) channels does the STM32G431CBT3 provide, and what are their key timing specifications?
The device integrates two independent 12-bit ADCs with up to 23 total channels (16 external + 7 internal). Each achieves 0.25 µs conversion time (4 MSPS), supports hardware oversampling up to 16× for effective 16-bit resolution, and operates across the full 0–3.6 V input range - with simultaneous sampling capability enabled via dual ADC mode.
What packaging and thermal characteristics define the STM32G431CBT3 variant specifically?
The STM32G431CBT3 uses an LQFP48 package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad. Its thermal resistance is θJA = 41 °C/W (JEDEC standard board), and it is rated for industrial temperature range (–40 to +85 °C). The "T3" suffix denotes tape-and-reel packaging with moisture sensitivity level (MSL) 3 per J-STD-020.
STM32G431CBT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32G4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 170MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 17x12b; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G431CBT3 FAQ
1.How can I place an order for STM32G431CBT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431CBT3 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 STM32G431CBT3 reliable?
The price and inventory of STM32G431CBT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431CBT3 is usually 5 days.
3.What payment methods are accepted for STM32G431CBT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431CBT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431CBT3?
STM32G431CBT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431CBT3 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 STM32G431CBT3?
For technical support, including STM32G431CBT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431CBT3 requirements.
6.How does Aetrix verify that STM32G431CBT3 is sourced from the original manufacturer or authorized distributors?
All STM32G431CBT3 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 STM32G431CBT3 meets industry standards.
7.What is the process for return or replacement of STM32G431CBT3?
All STM32G431CBT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431CBT3, 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 STM32G431CBT3 part is unused and in its original packaging.
Return procedure for STM32G431CBT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G431CBT3 Tags
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ATTINY4-TSHR
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