STMicroelectronics STM32G431KBT6

Overview

STM32G431KBT6 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, dual 12-bit ADCs (0.25 µs conversion), 4 comparators, 3 op-amps, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.

For engineers reviewing the STM32G431KBT6 datasheet, STM32G431KBT6 pinout, STM32G431KBT6 application, or STM32G431KBT6 equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support, 5 V-tolerant I/Os, hardware RNG, and UCPD interface for USB Type-C™ power delivery implementations.

Technical Context

The STM32G431KBT6 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 Flash with PCROP and ECC, 22 KB SRAM with parity, and 10 KB CCM SRAM with parity - all accessible via multi-AHB interconnect matrix.

Analog integration centers on two independent 12-bit ADCs (up to 23 channels, 16-bit oversampling), four rail-to-rail comparators, three programmable-gain op-amps with full terminal access, and a configurable voltage reference buffer (2.048 V / 2.5 V / 2.9 V). It also integrates CORDIC and FMAC hardware accelerators for real-time trigonometric and filtering computations.

Key Specifications

Pinout & Package

STM32G431KBT6 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN) package measuring 7 mm × 7 mm with 0.5 mm pitch and 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 STM32G431CBT6, the KBT6 offers UCPD and UFQFPN packaging for compact USB-C endpoints; versus STM32G474RET6, it trades memory/peripheral headroom for lower cost and smaller footprint in cost-sensitive motor/power applications.

Availability

STM32G431KBT6 is available at Aetrix Electronics and suitable for industrial motor control, digital power conversion, USB-C PD endpoint design, and programmable sensor nodes requiring stable component supply across production lifecycles.

Supply support for STM32G431KBT6 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 USB-C applications - combining real-time performance, rich analog integration, and hardware math acceleration in a scalable, cost-optimized platform.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32G431KBT6 operates at up to 170 MHz with an ART Accelerator enabling zero-wait-state Flash execution. Its performance is rated at 213 DMIPS (Dhrystone 2.1), verified under conditions of 1.71–3.6 V supply and ambient temperature range –40 °C to +85 °C. This frequency is achievable with internal PLL configuration using the 16 MHz RC oscillator or external crystal sources.

Does STM32G431KBT6 support USB Type-C™ Power Delivery negotiation?

Yes - it integrates a dedicated UCPD (USB-C Power Delivery) peripheral compliant with USB PD 3.0 specification. The UCPD block handles physical layer signaling on CC lines, PD message parsing, VCONN switching, and policy engine execution in hardware, eliminating the need for external PD transceivers or software-based protocol stacks.

How many ADC channels and what is the effective resolution with oversampling?

The device features two independent 12-bit ADCs supporting up to 23 external channels total. With hardware oversampling (up to 256×), effective resolution reaches 16 bits at 125 kSPS, confirmed in DS12589 Rev 6 Section 5.3.18. Oversampling is performed in hardware with automatic decimation and data transfer via DMA, reducing CPU overhead.

What low-power modes are available and what is the lowest typical current draw?

Five low-power modes are supported: Sleep, Stop 0, Stop 1, Standby, and Shutdown. In Shutdown mode with RTC disabled and VBAT disconnected, typical current draw is 0.25 µA at 25 °C (DS12589 Rev 6 Table 32). With RTC active on VBAT, standby current is 0.8 µA (Table 31), enabling battery-backed calendar and alarm functionality.