The STM32F091CBU6TR is a 32-bit ARM Cortex-M0 MCU from ST's STM32F0 series, clocked at 48 MHz with 128 KB of Flash and 32 KB of SRAM. It carries 38 I/O lines, a CANbus interface, I²C, SPI, UART/USART, plus a 13-channel 12-bit ADC and a 2-channel 12-bit DAC. The 48 MHz clock is enough for sensor fusion loops, motor commutation timing, or Modbus polling at typical baud rates. The 128 KB Flash holds a modest firmware stack with room for a bootloader and field-update image — no external memory needed for most control applications.
STMicroelectronics STM32F091CBU6TR ARM Cortex-M0 MCU, 48 MHz, 128 KB Flash
MPNSTM32F091CBU6TR
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STMicroelectronics STM32F0 series, ARM Cortex-M0 32-bit MCU, 48 MHz, 128 KB Flash, 32 KB SRAM, 38 I/O, CANbus, I²C, SPI, UART, 2x12-bit DAC, 13x12-bit ADC, 48-UFQFN exposed pad, -40 to 85°C.
$2.8264Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Series | STM32F0 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 2V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 48MHz |
| Package | Tape & Reel (TR) |
| RAM size | 32K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | DMA, I²S, POR, PWM, WDT |
| Connectivity | CANbus, I²C, IrDA, LINbus, SPI, UART/USART |
| Number of i (O) | 38 |
| Core processor | ARM® Cortex®-M0 |
| Case | 48-UFQFN Exposed Pad |
| Data converters | A/D 13x12b; D/A 2x12b |
| Program memory size | 128KB (128K x 8) |
Product details
Frequently asked questions
What is STM32F091CBU6TR's listed speed?
The core runs at 48 MHz. That's the maximum clock for the ARM Cortex-M0 on this part; it drives the peripheral bus and the ADC sampling rate.