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STMicroelectronics STM32F091RCH6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F091RCH6 ARM Cortex-M0 MCU, 48MHz, 256KB Flash

MPNSTM32F091RCH6
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STMicroelectronics STM32F0 series, ARM® Cortex®-M0 32-Bit MCU, 48MHz, 256KB Flash, 32K x 8 RAM, CANbus, I²C, SPI, UART/USART, 52 I/O, 64-UFBGA, -40 to 85°C.

$3.5697Ref. price · indicative, final on quote
STMicroelectronics STM32F091RCH6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F091RCH6 specifications
ParameterValue
SeriesSTM32F0
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed48MHz
PackageTray
RAM size32K x 8
Core size32-Bit Single-Core
PeripheralsDMA, I²S, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)52
Core processorARM® Cortex®-M0
Case64-UFBGA
Data convertersA/D 19x12b; D/A 2x12b
Program memory size256KB (256K x 8)

Product details

The STM32F091RCH6 packs 256KB of Flash program memory and 32K x 8 of SRAM, with 52 general-purpose I/O lines. The peripheral set includes CANbus, multiple I²C and SPI interfaces, UART/USART with IrDA and LIN support, plus a 12-bit ADC with 19 channels and a 2-channel 12-bit DAC.

The supply range spans 2V to 3.6V, so it runs from a single 3.3V rail or a 2-cell Li-ion pack without a regulator.

Housed in a 64-UFBGA (5x5 mm) package, this is a fine-pitch BGA. The supplier device package is 64-UFBGA (5x5).

Frequently asked questions

What is the maximum clock speed of STM32F091RCH6?

The core runs at 48MHz maximum, driven by an internal oscillator or an external clock source. At 48MHz the Flash requires one wait state for zero-wait access; the Cortex-M0 pipeline handles most single-cycle instructions at that speed.

What is the difference between STM32F091RCH6 and STM32F091RCT6?

The two parts share the same core, memory, and peripheral set. The key difference is the package: the RCH6 comes in a 64-UFBGA (5x5 mm) fine-pitch BGA, while the RCT6 uses a 64-LQFP (10x10 mm) gull-wing package. The LQFP variant is easier to hand-solder and inspect; the BGA saves board area but requires reflow assembly.