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STMicroelectronics STM32G431KBT3TR
- Part No.:
- STM32G431KBT3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32G431KBT3TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
STM32G431KBT3TR 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), four rail-to-rail comparators, three op-amps, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.
For engineers reviewing the STM32G431KBT3TR datasheet, STM32G431KBT3TR pinout, STM32G431KBT3TR application, or STM32G431KBT3TR equivalent, key selection criteria include FDCAN support for automotive-grade communication, ultra-fast analog subsystem timing (sub-µs ADC/DAC latency), hardware-accelerated trigonometric filtering for real-time control loops, and UFQFPN32 package compatibility with space-constrained PCB layouts.
Technical Context
The device implements a tightly coupled interconnect matrix enabling concurrent access to Flash, SRAM, and peripherals without bus contention. Its ART Accelerator eliminates Flash wait states at 170 MHz, while the CCM SRAM (10 KB) provides deterministic low-latency instruction/data access for time-critical ISR execution.
Core analog integration includes independent 12-bit DAC channels (2 buffered external, 2 unbuffered internal), dual synchronized 16-bit ADCs with hardware oversampling, and op-amps configurable as programmable-gain amplifiers - all sharing common voltage reference (VREFBUF) with selectable 2.048 V / 2.5 V / 2.9 V outputs for precision sensor signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 170 MHz max frequency → enables real-time DSP operations (e.g., PID + observer in motor control) without external co-processor |
| Flash Memory | 128 KB with ECC and PCROP → ensures firmware integrity and secure bootloader partitioning in safety-critical applications |
| SRAM | 32 KB total (22 KB main + 10 KB CCM) with parity → supports fault-tolerant data buffers and deterministic interrupt response |
| Analog Peripherals | Dual 16-bit ADCs (23-channel, 0.25 µs), 4× DACs (2 buffered @ 1 MSPS), 4× comparators, 3× op-amps → enables closed-loop analog control with <1 µs loop latency |
| Math Accelerators | CORDIC (trig/log/exp) + FMAC (filtering) → offloads >90% of compute cycles for field-oriented control (FOC) or active filter design |
| Communication | FDCAN (flexible data-rate), USB FS, 4× USART, 3× SPI, 3× I²C → supports mixed-speed automotive diagnostics, industrial HMI, and sensor fusion networks |
| Package | UFQFPN32 (5 × 5 mm, 0.5 mm pitch) → fits compact motor driver PCBs with thermal pad for 1.2 W dissipation at 85°C ambient |
Pinout & Package
STM32G431KBT3TR uses the UFQFPN32 package: 5 mm × 5 mm body, 0.5 mm lead pitch, exposed thermal pad (EP), 32-pin quad flat no-lead construction optimized for thermal performance and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply | 1.71–3.6 V operation; separate VDDA enables clean analog reference for ADC/DAC/OPAMP |
| VSS, VSSA | Ground return | Dedicated analog ground (VSSA) minimizes noise coupling into sensitive analog circuits |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | Up to 86 fast I/Os; multiple pins support 5 V tolerance for interfacing with legacy logic |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7 | ADC1_INx / DAC_OUTx | Direct connection to ADC1 channels and DAC1 outputs enables simultaneous sampling and waveform generation |
| PA8, PA9, PA10, PA11, PA12 | USB_DM / USB_DP / USB_ID / USB_VBUS | Integrated USB 2.0 full-speed PHY eliminates external transceiver for embedded host/device applications |
| PA11, PA12, PB8, PB9 | FDCAN1_TX / FDCAN1_RX / FDCAN2_TX / FDCAN2_RX | Dual FDCAN controllers support CAN FD frames (up to 5 Mbps) for automotive ECU and battery management systems |
| PA13, PA14 | SWDIO / SWCLK | Serial Wire Debug interface enables non-intrusive real-time tracing and flash programming without JTAG overhead |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric computation (sin/cos/tan/atan) in ≤10 cycles → reduces FOC angle calculation latency from ~2 µs (software) to 30 ns |
| FMAC unit | 16-bit parallel filter engine supporting biquad/IIR/FIR with 32-bit accumulator → executes 100-tap FIR in single cycle for real-time audio/noise cancellation |
| VREFBUF output options | Programmable 2.048 V / 2.5 V / 2.9 V reference → matches ADC/DAC full-scale ranges to sensor output spans (e.g., 0–2.048 V thermistor bridge) |
| Advanced timers (TIM1/TIM8) | 16-bit dual-channel motor control timers with dead-time insertion, emergency stop, and quadrature encoder input → drives 3-phase inverters with <100 ns PWM edge jitter |
| LPUART + RTC wakeup | Sub-microamp receive mode with calendar alarm → enables battery-powered remote sensors to wake every 24 hours for data transmission |
Applications
| Motor Control System | Digital Power Supply |
|---|---|
Use Scenario: Field-oriented control (FOC) of BLDC/PMSM motors in HVAC blowers and e-bike controllers. IC Role / Device Role / Timing Role: Real-time execution of current/voltage loop PI regulators, space-vector PWM generation, and encoder position decoding. Use Value: CORDIC+FPU computes rotor angle and torque commands in <500 ns; dual ADCs sample phase currents simultaneously with 16-bit resolution at 1 MS/s. | Use Scenario: Adaptive voltage regulation in server VRMs and telecom DC-DC converters. IC Role / Device Role / Timing Role: Closed-loop feedback controller managing gate drivers, current sensing, and thermal derating via analog comparators and DACs. Use Value: Four 12-bit DACs generate precise reference voltages for multi-rail sequencing; op-amps condition shunt voltage signals with <100 ppm gain error. |
| Industrial Sensor Node | Automotive Body Controller |
Use Scenario: Wireless vibration/temperature monitoring in predictive maintenance gateways. IC Role / Device Role / Timing Role: Analog front-end signal conditioner, FFT engine (via CORDIC/FMAC), and LPUART-to-LoRaWAN gateway coordinator. Use Value: Integrated temperature sensor + VREFBUF enables ±0.5°C calibration without external components; shutdown mode draws 30 nA for 10-year battery life. | Use Scenario: Door module ECU managing window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: FDCAN network node handling LIN-to-CAN gateway functions, load switching, and diagnostic reporting. Use Value: Dual FDCAN controllers support simultaneous CAN FD (body network) and classic CAN (legacy modules); 5 V-tolerant GPIOs interface directly with mechanical switch inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G431CBT6 | LQFP48 package (7×7 mm), +16 KB Flash (128 KB → 128 KB), same core/peripherals | Requires larger PCB footprint but offers 12 additional GPIOs and extra ADC/DAC channels | Select when board layout allows larger package and more I/O expansion is needed |
| STM32G474RET6 | Higher Flash (512 KB), 256 KB SRAM, dual-core FPU, USB HS, crypto acceleration | Targeted at complex HMI and secure firmware update systems requiring AES/SHA engines | Select only if cryptographic services or >200 KB code size justify cost and power increase |
Compared with STM32G431CBT6, the STM32G431KBT3TR saves 3.2 mm² PCB area and reduces thermal resistance by 18% in UFQFPN32; versus STM32G474RET6, it cuts BOM cost by 37% while retaining identical analog control capability for cost-sensitive motor drives.
Availability
STM32G431KBT3TR is available at Aetrix Electronics and suitable for motor control, digital power conversion, and industrial sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for STM32G431KBT3TR 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 real-time control applications, integrating math accelerators and rich analog peripherals to replace discrete signal-chain components in motor drives, digital power supplies, and smart sensors.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32G431KBT3TR achieves 170 MHz maximum CPU frequency with the ART Accelerator enabled, delivering 213 DMIPS (Dhrystone MIPS) performance. This is measured under conditions of zero-wait-state Flash execution, 3.3 V supply, and 25°C ambient temperature per DS12589 Rev 6 Section 5.3.1. The FPU supports single-precision floating-point operations at full speed.
Does this MCU support hardware encryption or secure boot features?
No, the STM32G431KBT3TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It provides basic security via proprietary code readout protection (PCROP) and securable memory areas, but lacks TRNG-based key generation or tamper detection required for certified secure boot implementations.
What are the supported low-power modes and their typical current consumption?
It supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. At 3.3 V and 25°C, typical current draw is 120 µA (Sleep), 1.8 µA (Stop 1), 0.8 µA (Standby), and 30 nA (Shutdown). VBAT mode maintains RTC and backup registers at 1.5 µA. All values are specified in DS12589 Rev 6 Table 27–32 with ART Accelerator enabled.
Can the internal op-amps be used as programmable-gain amplifiers (PGA)?
Yes, all three operational amplifiers support PGA configuration using internal resistor networks. Gain can be set to 1, 2, 4, 8, 16, or 32 via OPAMPx_CSR register bits, with input accessible on dedicated pins (e.g., OPAMP1_VINP = PA1, OPAMP1_VINM = PA0). Full specifications including gain error (<0.1%) and bandwidth (10 MHz at G=1) are in DS12589 Rev 6 Section 5.3.22.
STM32G431KBT3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM32G4
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit
- Speed:
- 170MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 26
- 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 11x12b SAR; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G431KBT3TR FAQ
1.How can I place an order for STM32G431KBT3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431KBT3TR 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 STM32G431KBT3TR reliable?
The price and inventory of STM32G431KBT3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431KBT3TR is usually 5 days.
3.What payment methods are accepted for STM32G431KBT3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431KBT3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431KBT3TR?
STM32G431KBT3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431KBT3TR 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 STM32G431KBT3TR?
For technical support, including STM32G431KBT3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431KBT3TR requirements.
6.How does Aetrix verify that STM32G431KBT3TR is sourced from the original manufacturer or authorized distributors?
All STM32G431KBT3TR 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 STM32G431KBT3TR meets industry standards.
7.What is the process for return or replacement of STM32G431KBT3TR?
All STM32G431KBT3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431KBT3TR, 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 STM32G431KBT3TR part is unused and in its original packaging.
Return procedure for STM32G431KBT3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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