STMicroelectronics STM32G431C8U6

Overview

STM32G431C8U6 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), three rail-to-rail op-amps, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G431C8U6 datasheet, STM32G431C8U6 pinout, STM32G431C8U6 application, or STM32G431C8U6 equivalent, key selection criteria include its 48-pin UFQFPN package, 5 V-tolerant GPIOs, FDCAN support for flexible data-rate automotive/industrial networks, hardware-accelerated trigonometric filtering, and low-power timer with sub-microsecond wakeup capability.

Technical Context

The STM32G431C8U6 implements a tightly coupled Arm Cortex-M4 core with FPU and Adaptive Real-time Accelerator (ART) 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 supports concurrent high-speed analog acquisition via dual ADCs with hardware oversampling.

Analog subsystem integration includes three programmable-gain op-amps (all pins accessible), four ultra-fast comparators, internal VREFBUF (2.048 V / 2.5 V / 2.9 V), and dedicated CORDIC/FMAC units for real-time coordinate rotation and FIR/IIR filter computation - eliminating software overhead in closed-loop control and signal conditioning.

Key Specifications

Pinout & Package

STM32G431C8U6 uses a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN) package, 7 × 7 mm body, 0.5 mm pitch, exposed thermal pad. Pinout conforms to ST's standardized UFQFPN48 mapping for STM32G4-series.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G431K8T6, the STM32G431C8U6 offers 13 more GPIOs and 48-pin routing flexibility; versus STM32G474RET6, it trades memory/crypto features for lower cost and smaller footprint - making it optimal for cost-sensitive, analog-rich embedded control.

Availability

STM32G431C8U6 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, and smart sensor node applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM32G431C8U6 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-efficiency digital power, motor control, and precision analog applications - combining Cortex-M4 performance with hardware math accelerators and robust mixed-signal integration to replace multi-chip solutions.

FAQ

What is the maximum operating frequency and associated DMIPS rating?

The STM32G431C8U6 operates at up to 170 MHz with an integer performance of 213 DMIPS, measured per the ARM Dhrystone 2.1 benchmark. This performance is sustained with zero wait states thanks to the ART Accelerator, which caches Flash accesses and prefetches instructions - enabling deterministic real-time execution in motor control loops and digital power algorithms.

Does this MCU support hardware-based cryptographic operations?

No, the STM32G431C8U6 does not include dedicated cryptographic accelerators (AES, SHA, PKA). It provides a true random number generator (RNG) and CRC calculation unit for basic integrity checks and entropy seeding, but full cryptographic operations must be implemented in software or offloaded to an external secure element.

Can the internal op-amps be configured as programmable-gain amplifiers?

Yes, all three operational amplifiers support PGA mode with gain settings of 1, 2, 4, 8, 16, or 32 via internal resistor ladders. Each op-amp's non-inverting input, inverting input, and output are individually accessible on dedicated pins - allowing external feedback networks or direct connection to ADC inputs without signal degradation.

What is the purpose of the CCM-SRAM and how is it used in practice?

The 10 KB CCM-SRAM is a tightly coupled memory block accessible only by the CPU (not DMA), with hardware parity checking. It is optimized for time-critical code and data - such as interrupt service routines, FOC inner-loop variables, or CORDIC/FMAC working buffers - ensuring deterministic latency and error detection without bus arbitration delays.