STMicroelectronics STM32F091CBU6

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM32F0
Packaging Tray |
Core Processor ARM® Cortex®-M0
Core Size 32-Bit Single-Core
Speed 48MHz
Connectivity CANbus, I2C, IrDA, LINbus, SPI, UART/USART
Peripherals DMA, I2S, POR, PWM, WDT
Number of I/O 38
Program Memory Size 128KB (128K x 8)
Program Memory Type FLASH
EEPROM Size -
RAM Size 32K x 8
Voltage - Supply (Vcc/Vdd) 2V ~ 3.6V
Data Converters A/D 13x12b; D/A 2x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 48-UFQFPN (7x7)
Package / Case 48-UFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM32F091CBU6 from STMicroelectronics is a 48MHz ARM Cortex-M0 MCU with 128KB flash and 32KB SRAM. It features DMA, I2S, POR, PWM, and WDT in a 48-UFQFN package. Operating at 2V-3.6V, it targets IoT, motor control, and audio applications.

  • High memory density: 128KB flash + 32KB SRAM for complex firmware.
  • ARM Cortex-M0 efficiency: Low power with 48MHz performance.
  • Rich peripherals: DMA and I2S enable advanced data streaming.
  • Compact UFQFN: Exposed pad improves heat dissipation in dense designs.

IoT Edge Nodes

ARM Cortex-M0 with 128KB flash runs lightweight protocols like MQTT for sensor data.

Motor Control Drives

PWM and DMA enable smooth BLDC motor commutation at 48MHz.

Audio Processing

I2S interface connects to codecs for voice recognition in smart speakers.

Industrial Automation

32KB SRAM buffers large data logs from factory sensors.

Portable Medical Monitors

Low 2V operation and UFQFN package suit wearable ECG monitors.

Smart Home Hubs

Multiple communication interfaces support Zigbee and Thread stacks.

Q: What core does it use?
A: ARM Cortex-M0 at 48MHz.
Q: How much flash memory?
A: 128KB flash and 32KB SRAM.
Q: What is the package type?
A: 48-UFQFN with exposed pad for thermal management.
Q: Does it support DMA?
A: Yes, includes DMA and I2S peripherals.
Q: What voltage is required?
A: 2V to 3.6V supply range.
Base Product Number : STM32F091CB
128KB flash 32-bit MCU 48-UFQFN 48MHz ARM Cortex-M0 audio IoT motor control STM32F0
Q: What core does it use?
A: ARM Cortex-M0 at 48MHz.
Q: How much flash memory?
A: 128KB flash and 32KB SRAM.
Q: What is the package type?
A: 48-UFQFN with exposed pad for thermal management.
Q: Does it support DMA?
A: Yes, includes DMA and I2S peripherals.
Q: What voltage is required?
A: 2V to 3.6V supply range.