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STMicroelectronics STM32G431CBU6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32G431CBU6 STM32G4 MCU, 170 MHz, 128 KB Flash, 48-UFQFPN

MPNSTM32G431CBU6
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STMicroelectronics STM32G4 series ARM Cortex-M4F microcontroller, STM32G431CBU6, 170 MHz, 128 KB flash, 32 KB RAM, 42 I/O, 48-UFQFPN (7x7 mm), tray.

$6.5600Ref. price · indicative, final on quote
STMicroelectronics STM32G431CBU6 datasheet (PDF)
Packaging48-UFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesSTM32G4
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32G431CBU6 specifications
ParameterValue
SeriesSTM32G4
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C ~ 85°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)42
Core processorARM® Cortex®-M4F
Case48-UFQFN Exposed Pad
Data convertersA/D 18x12b; D/A 4x12b
Program memory size128KB (128K x 8)

Product details

170 MHz Cortex-M4F with 128 KB flash — what that means for a control-loop design

The STM32G431CBU6 runs a single ARM Cortex-M4F core at 170 MHz. The 18-channel 12-bit ADC and 4-channel 12-bit DAC are the analog front-end that makes this part a fit for applications where the MCU both senses and actuates.

Package and board-fit: 48-UFQFPN exposed pad

The 48-UFQFPN (7x7 mm) package has an exposed pad underneath. The 42 I/O lines fan out to the perimeter; with a 0.50 mm pitch, a 4-layer board is the practical minimum for routing all signals without vias stacking up under the part.

The industrial temperature grade covers most factory-floor and outdoor enclosure environments.

Frequently asked questions

Will STM32G431CBU6 drop into a board designed for STM32L151CBU6A?

No — the STM32L151CBU6A uses a 32 MHz Cortex-M3 core versus the 170 MHz Cortex-M4F in the G431. The package footprint is the same 48-UFQFPN, but the supply voltage range, peripheral set, and clock tree differ. A board spin and firmware rewrite would be required.

What is the listed speed of STM32G431CBU6?

The core runs at 170 MHz. That is the maximum clock from the internal oscillator; the actual throughput depends on flash wait states and the bus matrix load.