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STMicroelectronics STM32G431K8T3
- Part No.:
- STM32G431K8T3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32G431K8T3.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,649
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Product details
Overview
STM32G431K8T3 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), 4 comparators, 3 op-amps, and CORDIC/FMAC math accelerators - deployed in motor control, digital power supplies, and industrial sensor nodes.
For engineers reviewing the STM32G431K8T3 datasheet, STM32G431K8T3 pinout, STM32G431K8T3 application, or STM32G431K8T3 equivalent, key selection considerations include its 48-pin UFQFPN package, FDCAN support for flexible data-rate automotive/industrial networks, USB Type-C™/PD controller (UCPD), and hardware-accelerated trigonometric and filtering operations critical for real-time closed-loop control.
Technical Context
The STM32G431K8T3 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 interconnect matrix routes 14 timers-including two 16-bit advanced motor-control timers with dead-time generation and emergency stop-alongside dual ADCs with hardware oversampling and 16-bit resolution.
Analog subsystem integration includes three rail-to-rail op-amps configurable as programmable-gain amplifiers (PGA), four ultra-fast comparators, and a voltage reference buffer (VREFBUF) supporting 2.048 V, 2.5 V, and 2.9 V outputs. The UCPD peripheral enables native USB Type-C™ port control with power delivery negotiation, while FDCAN supports ISO 11898-1 compliant communication up to 5 Mbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions; enables deterministic floating-point math and signal processing in real-time control loops. |
| Max Clock Frequency | 170 MHz (213 DMIPS); sustains high-speed PWM generation, ADC sampling, and communication stack execution without throttling. |
| Flash Memory | 128 KB with ECC and PCROP; ensures firmware integrity and secure code protection against unauthorized readout or corruption. |
| SRAM | 32 KB total (22 KB main + 10 KB CCM SRAM); CCM provides low-latency instruction/data access for time-critical ISR and control algorithms. |
| Analog Peripherals | Dual 16-bit ADCs (23-channel, 0.25 µs), 4x 12-bit DACs (2 buffered @1 MSPS), 4 comparators, 3 op-amps (PGA-capable); supports multi-sensor acquisition and precision actuator drive in single-chip systems. |
| Math Accelerators | CORDIC (trigonometric/hyperbolic functions) and FMAC (filtering); offloads CPU for motor FOC, digital PLLs, and adaptive filtering without software library overhead. |
| Communication | FDCAN (flexible data-rate), USB 2.0 FS + UCPD, 4x USART, 3x SPI, 3x I²C; enables robust fieldbus connectivity, USB-C PD sink/source design, and multi-protocol industrial gateways. |
Pinout & Package
STM32G431K8T3 uses a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per STMicroelectronics Doc ID033222 Rev 6, Section 4.3 (UFQFPN48 pinout description) and Table 12 (pin definition).
| 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 subsystems. |
| VSS, VSSA | Digital & analog ground | Independent grounding reduces noise coupling between digital switching and precision analog circuits. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2 | General-purpose I/O | Up to 38 GPIOs; most support 5 V tolerance, external interrupts, and multiple alternate functions (e.g., TIMx, ADCx, USARTx). |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7 | ADC1_IN0–IN6 / DAC_OUT1 / OPAMP inputs | Shared analog input channels enable simultaneous sampling of voltage/current feedback and reference signals in motor drives. |
| PA8, PA9, PA10, PA11, PA12 | USB_DM, USB_DP, USB_ID, USB_VBUS, UCPDx | Native USB 2.0 FS and UCPD signaling on dedicated pins; eliminates external transceivers for USB-C PD applications. |
| PB8, PB9 | FDCAN1_RX, FDCAN1_TX | Dedicated CAN FD physical layer interface; supports 2 Mbps classical and 5 Mbps fast-data-rate modes for automotive diagnostics and industrial networking. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware computation of sin/cos/tan/atan/sqrt/log/exp in ≤15 cycles; replaces ~1000-line C math libraries in motor FOC and sensor fusion. |
| FMAC filter engine | Configurable 32-tap FIR/IIR accelerator with DMA chaining; executes real-time digital filters (e.g., notch, LPF) at full 170 MHz without CPU load. |
| Advanced motor timers (TIM1/TIM8) | 8-channel complementary PWM with programmable dead time, fault input, and emergency stop; enables 3-phase inverter control with hardware safety response <1 µs. |
| VREFBUF output options | Three stable reference voltages (2.048 V, 2.5 V, 2.9 V); selectable via register for ADC calibration, DAC reference, or OPAMP biasing without external components. |
| UCPD peripheral | Integrated USB Power Delivery controller with CC logic, BMC decoding, and VCONN switching; supports USB-C sink/source/port partner negotiation without MCU firmware overhead. |
Applications
| Industrial Motor Control | Digital Power Supply |
|---|---|
Use Scenario: Field-oriented control (FOC) of BLDC/PMSM motors in HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm (Park/Clarke transforms, PI regulators), synchronized PWM generation, and current/voltage sensing via dual ADCs. Use Value: CORDIC and FMAC reduce CPU load by >65%, enabling 20 kHz PWM carrier frequency with 10 µs control loop latency. |
Use Scenario: Digital AC-DC and DC-DC converters with adaptive voltage regulation and fault protection. IC Role / Device Role / Timing Role: Closed-loop voltage/current regulation using 16-bit ADC oversampling, 12-bit DAC for reference generation, and advanced timers for isolated gate drive. Use Value: Hardware-accelerated math and 0.25 µs ADC conversion allow sub-10 µs loop response, improving transient suppression and efficiency across 10–95% load range. |
| USB-C PD Sink/Source | Smart Sensor Node |
Use Scenario: USB-C powered devices requiring programmable power negotiation (e.g., portable test equipment, docking stations). IC Role / Device Role / Timing Role: UCPD controller managing CC line BMC signaling, VBUS monitoring, VCONN switching, and PD policy engine execution. Use Value: Eliminates external PD controller IC; enables full USB-C PD 3.0 compliance with firmware-defined power roles and fast role swap support. |
Use Scenario: Battery-powered industrial condition monitoring node with multi-sensor fusion (temperature, vibration, humidity). IC Role / Device Role / Timing Role: Low-power sensor aggregation, wake-on-event ADC sampling, RTC-triggered periodic transmission, and cryptographic RNG for secure telemetry. Use Value: Shutdown mode draws <100 nA; LPTIM + RTC enables 10-year battery life with 1-minute wakeup intervals and 16-bit sensor accuracy. |
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), identical core/peripherals but 100-pin variant not applicable; same Flash/SRAM, no UCPD in G431xB series. | Requires PCB redesign for larger footprint; lacks UCPD, limiting USB-C PD use cases. | Select only if legacy LQFP layout exists and USB-C PD is unnecessary. |
| STM32G474RET6 | Higher-tier G474: 512 KB Flash, 128 KB SRAM, additional crypto accelerators (AES, PKA), no UCPD; same 170 MHz M4+FPU and analog features. | Better suited for complex firmware (RTOS, OTA updates) and cryptographic security; no native USB-C PD control. | Choose when extended memory, security, or higher ADC channel count (>23) is required - not for USB-C PD integration. |
Compared with STM32G431CBT6 and STM32G474RET6, the STM32G431K8T3 uniquely combines compact UFQFPN48 packaging, full FDCAN+UCPD connectivity, and hardware math acceleration - making it optimal for space-constrained, USB-C–enabled motor and power electronics where cost, size, and real-time analog performance are jointly critical.
Availability
STM32G431K8T3 is available at Aetrix Electronics and suitable for industrial motor control, digital power supplies, USB-C PD endpoints, and smart sensor nodes requiring stable component supply, long-term manufacturability, and qualified automotive-grade variants (−40°C to +105°C).
Supply support for STM32G431K8T3 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 analog products for industrial, automotive, and consumer markets.
The STM32G4 series targets high-performance, cost-sensitive embedded applications demanding rich analog integration, real-time math acceleration, and USB-C/automotive connectivity - bridging the gap between mainstream and high-end MCUs without sacrificing code compatibility or toolchain support.
FAQ
What is the maximum operating temperature range for STM32G431K8T3?
The STM32G431K8T3 is specified for industrial temperature range: −40°C to +85°C. It is also available in extended grade (−40°C to +105°C) under part number STM32G431K8T3Y. Thermal derating begins above 85°C ambient; junction temperature must remain below 125°C per datasheet Section 6.10.
Does STM32G431K8T3 support USB device mode without external PHY?
Yes - STM32G431K8T3 integrates a full-speed USB 2.0 device controller with internal transceiver, supporting enumeration, control transfers, and bulk/isochronous endpoints without external PHY. It also includes dedicated UCPD logic for USB-C cable detection, BMC decoding, and VCONN switching.
How many independent ADC instances does STM32G431K8T3 have?
It contains two independent 12-/16-bit ADCs (ADC1 and ADC2), each supporting up to 16 external channels and hardware oversampling up to 16×. They can operate simultaneously or in interleaved mode, achieving effective resolution up to 16 bits at 1 Msps aggregate sampling rate.
Is the CORDIC unit accessible via standard CMSIS-DSP library calls?
No - the CORDIC accelerator is accessed exclusively through dedicated registers (CORDIC_CSR, CORDIC_R1–R4) and requires direct register programming or ST's HAL drivers (e.g., HAL_CORDIC_Calculate). It is not abstracted into CMSIS-DSP APIs, ensuring deterministic latency (<15 cycles) but requiring vendor-specific initialization.
STM32G431K8T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM32G4
- Packaging:
- Bulk
- 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:
- 64KB (64K 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:
STM32G431K8T3 FAQ
1.How can I place an order for STM32G431K8T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431K8T3 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 STM32G431K8T3 reliable?
The price and inventory of STM32G431K8T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431K8T3 is usually 5 days.
3.What payment methods are accepted for STM32G431K8T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431K8T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431K8T3?
STM32G431K8T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431K8T3 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 STM32G431K8T3?
For technical support, including STM32G431K8T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431K8T3 requirements.
6.How does Aetrix verify that STM32G431K8T3 is sourced from the original manufacturer or authorized distributors?
All STM32G431K8T3 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 STM32G431K8T3 meets industry standards.
7.What is the process for return or replacement of STM32G431K8T3?
All STM32G431K8T3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431K8T3, 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 STM32G431K8T3 part is unused and in its original packaging.
Return procedure for STM32G431K8T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G431K8T3 Tags
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