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STMicroelectronics STM32G431KBU3 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32G431KBU3 STM32G4 MCU, ARM Cortex-M4F 170MHz

MPNSTM32G431KBU3
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STMicroelectronics STM32G4 series STM32G431KBU3, ARM Cortex-M4F 32-Bit Single-Core MCU, 170MHz, 128KB (128K x 8) FLASH, 32K x 8 RAM, 26 I/O, 1.71V~3.6V, -40°C~125°C, 32-UFQFN Exposed Pad.

$7.1100Ref. price · indicative, final on quote
StockContact for availability
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Specifications

STM32G431KBU3 Technical Specifications
ParameterValue
SeriesSTM32G4
Mounting typeSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C~125°C(TA)
Speed170MHz
PackageTray
RAM size32K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)26
Core processorARM® Cortex®-M4F
Case32-UFQFN Exposed Pad
Data convertersA/D 11x12b; D/A 4x12b
Program memory size128KB (128K x 8)

Product details

The 11-channel 12-bit ADC and four 12-bit DACs let it sample phase currents and output analog setpoints without external converters — a common BOM simplification on servo-drive and battery-charger boards.

Package and thermal: 32-UFQFPN with exposed pad

Housed in a 32-UFQFN exposed-pad package (5x5 mm body), this MCU is a surface-mount part that needs the central thermal pad soldered to a PCB copper island for both mechanical stability and heat sinking. The 26 I/O are brought out on the perimeter; the pad itself is not a signal pin but must be connected to ground (or the appropriate supply plane per the datasheet layout guidelines).

Supply range and power-on reset

The integrated brown-out detect and POR (power-on reset) peripherals mean no external supervisor IC is needed for basic reset sequencing — a cost and board-area saving on high-density designs.

Lifecycle and sourcing posture

STMicroelectronics lists the STM32G431KBU3 as an active product — no NRND or EOL flags, no last-time-buy window.

Frequently asked questions

Is STM32G431KBU3 obsolete or nearing end of life?

No.

What are the alternatives or equivalents to STM32G431KBU3?

Within the STM32G4 series, pin-compatible variants differ mainly in Flash density (up to 512 KB) and package pin count. The STM32G431KBU3 sits at the 128 KB Flash / 32-UFQFPN entry point; a higher-memory sibling like the STM32G441 would be the next step up if firmware size exceeds 128 KB. All share the same Cortex-M4F core and peripheral set, so migration is a linker-script change plus a BOM swap.