STMicroelectronics STM32G431K8U6

Overview

STM32G431K8U6 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, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G431K8U6 datasheet, STM32G431K8U6 pinout, STM32G431K8U6 application, or STM32G431K8U6 equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support for flexible data-rate automotive/industrial bus communication, hardware-accelerated trigonometric filtering for real-time control loops, and 5 V-tolerant GPIOs enabling direct interface with legacy logic levels.

Technical Context

The STM32G431K8U6 implements a tightly coupled 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-to peripherals without CPU intervention.

Analog subsystem integration includes two independent 16-bit ADCs with hardware oversampling (up to 23 channels), four rail-to-rail comparators, and three fully accessible operational amplifiers configurable as programmable-gain amplifiers (PGA), all sharing a common 1.71–3.6 V supply domain with internal voltage reference buffer (VREFBUF) supporting 2.048 V, 2.5 V, and 2.9 V outputs.

Key Specifications

Pinout & Package

STM32G431K8U6 uses the UFQFPN48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per STMicroelectronics DS12589 Rev 6, Section 4.3 (UFQFPN48 pinout description) and Table 12 (pin definition).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32G431KB6, the STM32G431K8U6 adds FDCAN and UCPD for modern bus and power delivery integration; versus STM32G474RET6, it trades memory and crypto for lower BOM cost and smaller 7×7 mm UFQFPN footprint in resource-constrained control nodes.

Availability

STM32G431K8U6 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and smart sensor node designs requiring stable component supply, long-term lifecycle assurance, and qualified traceability for ISO 13485 and IATF 16949 production environments.

Supply support for STM32G431K8U6 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32G4 series targets high-performance, analog-rich embedded control applications - specifically engineered for digital power, motor control, and real-time signal processing where math acceleration and precision mixed-signal integration are critical.

FAQ

What is the maximum operating temperature range for STM32G431K8U6?

The STM32G431K8U6 is specified for industrial temperature range: –40 °C to +85 °C ambient, validated per JEDEC JESD47 stress testing. Thermal performance is documented in Section 6.10 of DS12589 Rev 6, with θ_JA = 42.5 °C/W for UFQFPN48 package under standard 2-layer PCB conditions.

Does STM32G431K8U6 support hardware encryption?

No - the STM32G431K8U6 does not integrate AES, SHA, or PKA cryptographic accelerators. Those features are present only in the G47x/G48x subfamilies (e.g., STM32G474). This part relies on software libraries or external secure elements for encryption tasks.

Can the CCM SRAM be used for stack allocation in FreeRTOS?

Yes - the 10 KB CCM SRAM is accessible via both instruction and data buses with hardware parity checking, making it ideal for time-critical FreeRTOS stacks and heap allocations. It must be explicitly mapped in the linker script and initialized before scheduler start.

Is the VREFBUF output stable enough for 16-bit ADC reference use?

Yes - VREFBUF delivers 2.048 V, 2.5 V, or 2.9 V with ±0.5% initial accuracy and ±30 ppm/°C drift over temperature, meeting 16-bit ADC INL requirements when used as VREF+ for ADC1/ADC2. Calibration values are stored in system memory and accessible at boot.