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STMicroelectronics STM32G491CEU6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32G491CEU6 ARM Cortex-M4F MCU, 170 MHz, 512 KB Flash

MPNSTM32G491CEU6
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STMicroelectronics STM32G4 series, STM32G491CEU6, 32-Bit Single-Core ARM Cortex-M4F, 170 MHz, 512KB Flash, 112K x 8 RAM, 42 I/O, CANbus/I²C/SPI/USART/USB, 19x12b ADC + 4x12b DAC, -40°C~85°C, 48-UFQFN Exposed Pad.

$10.0400Ref. price · indicative, final on quote
STMicroelectronics STM32G491CEU6 datasheet (PDF)
Packaging48-UFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesSTM32G4
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32G491CEU6 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 size112K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, IRTIM, LINbus, SAI, SPI, UART/USART, USB
Number of i (O)42
Core processorARM® Cortex®-M4F
Case48-UFQFN Exposed Pad
Data convertersA/D 19x12b; D/A 4x12b
Program memory size512KB (512K x 8)

Product details

Analog integration — 19 ADC channels and 4 DAC outputs

Nineteen 12-bit ADC channels and four 12-bit DAC outputs are on-die, which means a three-phase motor drive with current sensing on all legs plus a DC-link voltage measurement fits without external multiplexers or separate DACs. The 4 DAC channels can generate the analog references or setpoints for paralleled power stages directly from the core.

Connectivity and peripheral set for industrial control

CANbus, I²C, SPI, UART/USART, USB, SAI, and LINbus are all present, along with a full complement of timers including PWM generation and a brown-out detect/reset. The 42 I/O pins in the 48-pin package leave enough for a parallel LCD interface or a bank of opto-coupled inputs while keeping the serial buses routed.

Package and thermal — 48-UFQFN with exposed pad

Housed in a 48-UFQFN exposed-pad package (7x7 mm body), the STM32G491CEU6 is a surface-mount device.

Frequently asked questions

Can STM32G491CEU6 replace STM32G431CEU6?

The STM32G491CEU6 runs at 170 MHz versus the STM32G431's lower clock, and carries 512 KB Flash compared to the G431's smaller memory. Pin compatibility depends on the specific package variant — verify the 48-pin UFQFPN footprint against your layout before substituting. The G491 is a higher-performance drop-in candidate for the same socket if the supply rails and peripheral mapping match.

What is the difference between STM32G491CEU6 and STM32L151CBU6A?

The G491 also offers more ADC channels (19 vs 16) and DAC channels (4 vs 2). The L151 is an ultra-low-power line; the G491 is a high-performance line with DSP/FPU. They are not pin-compatible and serve different power-versus-performance design targets.

What is the listed speed of STM32G491CEU6?

The core runs at 170 MHz maximum, which is the highest speed grade in the STM32G4 series.