STMicroelectronics

STM32G431K8T6 - 170MHz Arm Cortex-M4F MCU | STMicroelectronics

Name: STM32G431K8T6
Brand: STMicroelectronics
Price: 4.32 USD
Availability: InStock

MPN: STM32G431K8T6 ✓ Active

In Stock (99,999) Ships in 1-3 business days

1.71 V to 3.6 V Vdss LQFP32 Package 170 MHz Speed 128 KB Memory

$4.32 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$4.32	$4.32
10	$3.89	$38.90
100	$3.46	$346.00
500	$3.11	$1,555.00
1,000	$2.77	$2,770.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for STM32G431K8T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

STM32G431K6T6

✅ Drop-In

📦 LQFP32

64 KB Flash instead of 128 KB, same package and pinout

📋 Reference alternative (not in catalog)

STM32G474K8T6

✅ Drop-In

📦 LQFP32

same package, higher performance with 170 MHz and more analog features

📋 Reference alternative (not in catalog)

ℹ️ 4 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

STM32G431K8T6 Maximum Ratings & Electrical Characteristics

Core	Arm Cortex-M4F with FPU
Maximum Clock Frequency	170 MHz
Flash Memory	128 KB
SRAM	32 KB
Operating Voltage	1.71 V to 3.6 V
ADC Resolution	12-bit
ADC Speed	5 MSPS
DAC Resolution	12-bit
Number of Timers	10
Communication Interfaces	SPI, I2C, USART, FDCAN
Package	LQFP32
Mounting Type	Surface Mount
Operating Temperature	-40C to +85C
RoHS Status	Compliant
DMA Channels	16

STM32G431K8T6 Pin Configuration

Pin 1	VBAT — Battery backup supply
Pin 2	PC14 — GPIO / OSC32_IN
Pin 3	PC15 — GPIO / OSC32_OUT
Pin 4	OSC_IN — External clock input
Pin 5	OSC_OUT — External clock output
Pin 6	NRST — Reset (active low)
Pin 7	VDD — Digital power supply
Pin 8	VSS — Ground
Pin 9	PA0 — GPIO / ADC input
Pin 10	PA1 — GPIO / ADC input
Pin 11	PA2 — GPIO / USART2_TX
Pin 12	PA3 — GPIO / USART2_RX
Pin 13	PA4 — GPIO / DAC_OUT1
Pin 14	PA5 — GPIO / DAC_OUT2
Pin 15	PA6 — GPIO / TIM1_CH1
Pin 16	PA7 — GPIO / TIM1_CH2
Pin 17	PB0 — GPIO / TIM1_CH3
Pin 18	PB1 — GPIO / TIM1_CH4
Pin 19	PB2 — GPIO / BOOT1
Pin 20	PB10 — GPIO / I2C2_SCL
Pin 21	PB11 — GPIO / I2C2_SDA
Pin 22	PB12 — GPIO / SPI2_NSS
Pin 23	PB13 — GPIO / SPI2_SCK
Pin 24	PB14 — GPIO / SPI2_MISO
Pin 25	PB15 — GPIO / SPI2_MOSI
Pin 26	PA8 — GPIO / TIM1_CH1
Pin 27	PA9 — GPIO / USART1_TX
Pin 28	PA10 — GPIO / USART1_RX
Pin 29	PA11 — GPIO / CAN_RX
Pin 30	PA12 — GPIO / CAN_TX
Pin 31	VDD — Digital power supply
Pin 32	VSS — Ground

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

STM32G431K8T6 is suitable for 6 applications: Field-Oriented Control (FOC) of Brushless DC Motors, Digital Power Supplies (Buck, Boost, Flyback), Industrial Automation and Control, Digital Power Conversion for Solar Inverters, Battery Management Systems (BMS), Robotics and Drones.

🚗

Field-Oriented Control (FOC) of Brushless DC Motors

The STM32G431K8T6 is ideal for FOC motor control due to its 170 MHz Cortex-M4F core, high-resolution timers, and fast 12-bit ADC. In a typical FOC application, the MCU reads phase currents via the ADC, computes the rotor position using an encoder or Hall sensor, and generates PWM signals with dead-time control. The high-resolution timer (HRTIM) provides precise PWM generation with up to 184 ps resolution, enabling smooth and efficient motor operation. The ADC's 5 MSPS sampling rate allows synchronized current measurement, critical for accurate torque control. Compared to lower-performance MCUs, the G431K8T6 reduces torque ripple and improves dynamic response, making it suitable for robotics, drones, and electric vehicles.

Recommended

STSPIN32F0 (Motor driver with integrated MCU) L6390 (Gate driver for MOSFETs)

⚡

Digital Power Supplies (Buck, Boost, Flyback)

The STM32G431K8T6 excels in digital power conversion, offering a 12-bit ADC with hardware oversampling and high-resolution timers for precise PWM control. In a buck converter application, the MCU samples output voltage and current, runs a digital control loop (e.g., PID), and adjusts the PWM duty cycle to regulate the output. The HRTIM enables interleaved and multi-phase operation, reducing ripple and improving efficiency. The device's 170 MHz core ensures fast loop execution, achieving high bandwidth and stability. Its wide operating voltage range (1.71V to 3.6V) allows direct supply from the power stage. This makes it suitable for server power supplies, telecom rectifiers, and battery chargers.

Recommended

STP110N8F6 (Power MOSFET for switching stage) TL431 (Voltage reference for feedback)

🏭

Industrial Automation and Control

The STM32G431K8T6 is well-suited for industrial automation, providing robust communication interfaces (FDCAN, USART, SPI, I2C) and a rich set of timers. In a PLC or industrial controller, the MCU manages I/O, executes control logic, and communicates with field devices via CAN or Modbus. Its 128 KB Flash allows storing complex firmware, while the 32 KB SRAM supports real-time data processing. The device's operating temperature range (-40C to +85C) ensures reliability in harsh environments. The MPU and NVIC enhance system robustness, making it suitable for safety-critical applications. Compared to older MCUs, the G431K8T6 offers higher performance and lower power consumption.

Recommended

ISO1042 (Isolated CAN transceiver) SN65HVD230 (CAN transceiver)

⚡

Digital Power Conversion for Solar Inverters

The STM32G431K8T6 is optimized for solar inverter applications, where precise control of power stages is essential. Its high-resolution timers and fast ADC enable maximum power point tracking (MPPT) algorithms and grid synchronization. In a typical solar inverter, the MCU samples PV voltage and current, runs MPPT, and generates PWM for the DC-DC and DC-AC stages. The 170 MHz core ensures fast computation of control loops, improving efficiency and reducing harmonic distortion. The device's multiple ADCs allow simultaneous sampling of multiple channels, simplifying current and voltage sensing. Its robust communication interfaces (FDCAN, USART) enable monitoring and remote control.

Recommended

STW40N60M2 (Power MOSFET for inverter stage) ISO7741 (Digital isolator for gate drive)

🔋

Battery Management Systems (BMS)

The STM32G431K8T6 is suitable for BMS applications, offering multiple ADCs for voltage and current sensing, and communication interfaces for cell monitoring. In a BMS, the MCU monitors cell voltages, temperatures, and current, and controls balancing and protection circuits. Its 12-bit ADC with 5 MSPS ensures accurate measurements, while the 128 KB Flash allows storing complex state-of-charge algorithms. The device's low power modes help extend battery life. The FDCAN interface enables communication with the main controller. Compared to dedicated BMS ICs, the G431K8T6 offers flexibility and programmability.

Recommended

LTC6811 (Battery stack monitor) BQ76940 (Battery monitor)

✈️

Robotics and Drones

The STM32G431K8T6 is ideal for robotics and drones, providing high-performance processing and precise motor control. Its 170 MHz Cortex-M4F core with FPU accelerates complex algorithms like sensor fusion and PID control. The device's multiple timers and ADCs enable simultaneous control of multiple motors and sensors. In a drone, the MCU reads IMU data, runs flight control algorithms, and generates PWM for the ESCs. The compact LQFP32 package saves PCB space, and the low power consumption extends flight time. Its robust communication interfaces (SPI, I2C, USART) connect to GPS, telemetry, and other peripherals.

Recommended

MPU6050 (IMU sensor) ESC32 (Electronic speed controller)

Recommended Products Summary

STSPIN32F0 Motor driver with integrated MCU Used in: Field-Oriented Control (FOC) of Brushless DC Motors L6390 Gate driver for MOSFETs Used in: Field-Oriented Control (FOC) of Brushless DC Motors STP110N8F6 Power MOSFET for switching stage Used in: Digital Power Supplies (Buck, Boost, Flyback) TL431 Voltage reference for feedback Used in: Digital Power Supplies (Buck, Boost, Flyback) ISO1042 Isolated CAN transceiver Used in: Industrial Automation and Control SN65HVD230 CAN transceiver Used in: Industrial Automation and Control STW40N60M2 Power MOSFET for inverter stage Used in: Digital Power Conversion for Solar Inverters ISO7741 Digital isolator for gate drive Used in: Digital Power Conversion for Solar Inverters LTC6811 Battery stack monitor Used in: Battery Management Systems (BMS) BQ76940 Battery monitor Used in: Battery Management Systems (BMS) MPU6050 IMU sensor Used in: Robotics and Drones ESC32 Electronic speed controller Used in: Robotics and Drones

What is the maximum clock frequency of STM32G431K8T6?

The STM32G431K8T6 operates at a maximum clock frequency of 170 MHz. According to the STMicroelectronics datasheet, this is achieved with the Arm Cortex-M4F core and a PLL, enabling high-performance real-time control.

What is the price of STM32G431K8T6?

As of 2026-08-13, the STM32G431K8T6 is priced at approximately $4.32 for single-unit quantities, decreasing to $2.77 at 1000 units. Prices vary by distributor and availability.

Where to buy STM32G431K8T6 online?

The STM32G431K8T6 is available from major distributors such as DigiKey and Mouser. You can purchase it directly from their websites, which offer real-time stock and pricing.

What is the lead time for STM32G431K8T6?

The typical lead time for STM32G431K8T6 is 8-12 weeks from STMicroelectronics, but it may be in stock at distributors. Check DigiKey or Mouser for current availability.

Is STM32G431K8T6 in stock?

Stock availability for STM32G431K8T6 varies by distributor. As of 2026-08-13, it is listed as active and available at major distributors, but verify current stock on DigiKey or Mouser.

STM32G431K8T6 vs STM32G431K6T6 - which is better for motor control?

The STM32G431K8T6 has 128 KB Flash and 32 KB SRAM, while the STM32G431K6T6 has 64 KB Flash and 32 KB SRAM. For motor control, the larger Flash of the K8T6 allows more complex algorithms, making it better for advanced FOC implementations.

What is the difference between STM32G431K8T6 and STM32G431K6T6?

The main difference is Flash memory: STM32G431K8T6 has 128 KB, while STM32G431K6T6 has 64 KB. Both share the same LQFP32 package and 170 MHz core, but the K8T6 offers more code space.

When should I choose STM32G431K8T6 over STM32G431K6T6?

Choose STM32G431K8T6 when your application requires more than 64 KB of Flash, such as complex motor control algorithms or digital power conversion with extensive firmware. The K6T6 is sufficient for simpler applications.

What is the best drop-in replacement for STM32G431K8T6?

The STM32G431K8T6 can be replaced by the STM32G431K6T6 (same package, less Flash) or the STM32G431R8T6 (same Flash, more pins). For a pin-compatible drop-in, the STM32G431K6T6 is the closest, but verify Flash requirements.

Can STM32G431K6T6 replace STM32G431K8T6?

Yes, the STM32G431K6T6 is pin-compatible and can replace the STM32G431K8T6, but it has only 64 KB Flash instead of 128 KB. Ensure your firmware fits within the reduced memory.

Where to download STM32G431K8T6 datasheet PDF?

The STM32G431K8T6 datasheet is available for download from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm32g431k8.pdf.

Where to find STM32G431K8T6 pinout?

The pinout for STM32G431K8T6 is detailed in the datasheet, specifically in the pin description section. It is also available in the STM32CubeMX tool for pin configuration.

What are the key specifications of STM32G431K8T6 that engineers should know?

The STM32G431K8T6 features a 170 MHz Arm Cortex-M4F core, 128 KB Flash, 32 KB SRAM, 12-bit ADC at 5 MSPS, 12-bit DAC, and advanced timers. It operates from 1.71V to 3.6V and comes in an LQFP32 package.

Hey Google, what can replace STM32G431K8T6?

The STM32G431K8T6 can be replaced by the STM32G431K6T6 (same package, less Flash) or the STM32G431R8T6 (same Flash, more pins). For a cross-brand alternative, consider the NXP LPC55S16, but verify pin compatibility.

Is STM32G431K8T6 the same as STM32G431K6T6?

No, they are not the same. The STM32G431K8T6 has 128 KB Flash, while the STM32G431K6T6 has 64 KB Flash. They share the same package and core, but differ in memory capacity.

What is the best NXP equivalent for STM32G431K8T6?

A potential NXP equivalent is the LPC55S16, which offers a Cortex-M33 core at 150 MHz. However, it is not pin-compatible, so a PCB redesign is required. For a drop-in, stick with STM32G4 family variants.

What is the operating voltage of STM32G431K8T6?

The STM32G431K8T6 operates from 1.71V to 3.6V. According to the ST datasheet, this wide range supports battery-powered and industrial applications.

Does STM32G431K8T6 support FOC motor control?

Yes, the STM32G431K8T6 is optimized for field-oriented control (FOC) of motors. Its high-resolution timers and fast ADC enable precise current sensing and PWM generation.

What is the package of STM32G431K8T6?

The STM32G431K8T6 is available in a 32-pin LQFP package (LQFP32). This surface-mount package is suitable for compact PCB designs.

Is STM32G431K8T6 RoHS compliant?

Yes, the STM32G431K8T6 is RoHS compliant, as indicated in the STMicroelectronics datasheet and product page.

Engineering reference data for STM32G431K8T6 — comparison, design guidance, and compliance information.

Selection Guide

Choose the STM32G431K8T6 when you need a high-performance MCU with 128 KB Flash for complex applications like motor control, digital power, or industrial automation. If your application requires less than 64 KB of code, the STM32G431K6T6 is a cost-effective alternative with the same package. For applications needing more I/O pins, consider the STM32G431R8T6 (LQFP64) or STM32G431C8T6 (LQFP48), but note these are not pin-compatible. The STM32G474K8T6 offers additional analog features and is pin-compatible, making it a good upgrade path. For cross-brand alternatives, the NXP LPC55S16 offers a different core and package, requiring a redesign. Evaluate your memory, pin, and peripheral requirements to select the best fit.

Comparison with Alternatives

Parameter	This Product	STM32G431K6T6	STM32G474K8T6	STM32G431R8T6
Package	LQFP32	LQFP32 - same	LQFP32 - same	LQFP64 - different
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Core	Arm Cortex-M4F	Arm Cortex-M4F	Arm Cortex-M4F	Arm Cortex-M4F
Maximum Clock Frequency	170 MHz	170 MHz	170 MHz	170 MHz
Flash Memory	128 KB	64 KB	128 KB	128 KB
SRAM	32 KB	32 KB	32 KB	32 KB
ADC Resolution	12-bit	12-bit	12-bit	12-bit
ADC Speed	5 MSPS	5 MSPS	5 MSPS	5 MSPS
DAC Resolution	12-bit	12-bit	12-bit	12-bit
Communication Interfaces	SPI, I2C, USART, FDCAN	SPI, I2C, USART, FDCAN	SPI, I2C, USART, FDCAN	SPI, I2C, USART, FDCAN

Key Differentiators

Higher Flash memory (128 KB) compared to STM32G431K6T6 (vs STM32G431K6T6)
Same package and pinout as STM32G431K6T6 (vs STM32G431K6T6)
Higher performance than STM32G431K6T6 for motor control (vs STM32G431K6T6)

Design Notes

Decouple each VDD pin with a 100 nF ceramic capacitor placed as close as possible to the pin. Additionally, connect a 4.7 uF bulk capacitor to the main VDD rail. The VDDA pin must be connected to a clean analog supply, typically through a ferrite bead and a 1 uF capacitor, to ensure ADC accuracy. For battery-powered designs, connect VBAT to the battery through a Schottky diode to prevent back-powering.

For the LQFP32 package, ensure the exposed pad (if present) is soldered to the PCB ground plane for thermal and electrical performance. Route high-speed signals (SPI, FDCAN) with controlled impedance and minimize trace lengths. Place the crystal oscillator close to the OSC_IN/OSC_OUT pins with load capacitors as specified in the datasheet. Keep analog and digital grounds separate and connect them at a single point.

Do not exceed the absolute maximum ratings, especially on VDDA and VDD. Ensure the NRST pin is properly pulled up with a 100 nF capacitor to ground to avoid spurious resets. When using the ADC, configure the sampling time appropriately to avoid inaccurate readings. For motor control, use the HRTIM and ADC injected channels to synchronize current sampling with PWM, avoiding sampling during switching transients.