The STM32F091RCH6TR: The 256 KB Flash (256K x 8) and 32 KB SRAM support RTOS, protocol stacks, and application code.
64-UFBGA (5x5 mm) — footprint and assembly notes
The 64-UFBGA package measures 5x5 mm.
STM32F091RCH6TR ARM Cortex-M0 MCU, 48 MHz, 256 KB Flash
MPNSTM32F091RCH6TR
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STMicroelectronics STM32F0 series, ARM Cortex-M0 32-bit MCU, 48 MHz, 256 KB Flash, 32K x 8 RAM, CANbus, I²C, SPI, UART/USART, 52 I/O, 2V-3.6V, -40°C to 85°C, 64-UFBGA (5x5), Tape & Reel.
$3.2289Ref. 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) | 52 |
| Core processor | ARM® Cortex®-M0 |
| Case | 64-UFBGA |
| Data converters | A/D 19x12b; D/A 2x12b |
| Program memory size | 256KB (256K x 8) |
Product details
Frequently asked questions
What is the closest pin-compatible alternative to STM32F091RCH6TR?
The STM32F091RCH6TR shares the same base product number (STM32F091) and footprint with other members of the STM32F091 family in the 64-UFBGA package. The main difference across variants is typically the Flash and RAM density — the RCH6 variant sits at 256 KB Flash / 32 KB SRAM. For a drop-in replacement with the same pinout, look at other STM32F091xCH6 or STM32F091xCT6 parts, but confirm the memory sizing matches your firmware image.