STMicroelectronics STM32G431M8T6

Overview

STM32G431M8T6 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), and 3 operational amplifiers usable in PGA mode - deployed in motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G431M8T6 datasheet, STM32G431M8T6 pinout, STM32G431M8T6 application, or STM32G431M8T6 equivalent, key selection considerations include FDCAN support for flexible data-rate automotive/industrial networks, CORDIC/FMAC hardware accelerators for real-time trigonometric and filtering computations, and UCPD interface for USB Type-C™ power delivery control.

Technical Context

The STM32G431M8T6 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 ECC-protected Flash, 22 KB parity-checked SRAM, and 10 KB CCM-SRAM with parity - all accessible via multi-AHB interconnect matrix for deterministic peripheral access.

Analog integration centers on two independent 16-bit ADCs (up to 23 channels, hardware oversampling), four rail-to-rail comparators, three user-configurable op-amps (all terminals exposed), and VREFBUF supporting 2.048 V / 2.5 V / 2.9 V outputs - coordinated with 14 timers including two 16-bit advanced motor-control timers with dead-time generation and emergency stop.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 42 general-purpose I/Os (39 5 V-tolerant), 3 dedicated VDD/VSS pairs, VDDA/VSSA for analog domain, VREF+/- for ADC reference, BOOT0 for boot mode selection, NRST for reset, and SWDIO/SWCLK for debug.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G431K8T6, the STM32G431M8T6 offers 16 additional GPIOs, full timer complement, and dual ADC/DAC resources - making it optimal for complex analog-digital control. Versus STM32G474RET6, it trades crypto and memory headroom for cost and power efficiency in non-security-critical embedded control.

Availability

STM32G431M8T6 is available at Aetrix Electronics and suitable for motor control, digital power conversion, industrial sensing, and USB-C power delivery applications requiring stable component supply across design-in, prototyping, and volume production phases.

Supply support for STM32G431M8T6 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, cost-sensitive embedded control applications - combining rich analog integration, math acceleration, and real-time responsiveness for digital power, motor drives, and smart sensing.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32G431M8T6 operates at up to 170 MHz with an integer performance rating of 213 DMIPS (Dhrystone 2.1). This is achieved using the ART Accelerator for zero-wait-state Flash execution and includes full DSP instruction support and single-cycle MAC operations - verified per ST's DS12589 Rev 6 characterization across the industrial temperature range (–40°C to +85°C).

Does this MCU support hardware-based cryptographic functions?

No, the STM32G431M8T6 does not integrate dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It includes a true random number generator (RNG) and CRC calculation unit, but lacks hardware encryption engines found in the G47x subfamily. Secure firmware updates require software-based libraries or external secure elements.

What are the supported low-power modes and their typical current consumption?

The device supports Sleep, Stop 0, Stop 1, Standby, and Shutdown modes. At 25°C and 3.3 V, typical current draw is 110 µA in Sleep (Flash ON), 1.3 µA in Standby (RTC active), and 20 nA in Shutdown (VBAT only). All modes retain SRAM content except Standby and Shutdown - validated per Table 29–32 in DS12589 Rev 6.

Can the op-amps be used as programmable-gain amplifiers without external components?

Yes - all three op-amps support PGA configuration using internal resistor networks. Gain settings of 1, 2, 4, 8, 16, and 32× are selectable via OPAMPx_CSR register bits, with inputs routed directly from GPIOs or ADC channels. No external resistors are required for these standard gains, as confirmed in Section 3.22 and Table 172 of the datasheet.