STMicroelectronics STM32F091VCH6

Overview

STM32F091VCH6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFBGA100 package, operating up to 48 MHz with 256 KB Flash, 32 KB SRAM, dual 12-bit DAC, 12-bit ADC (16-channel), CAN 2.0B interface, and RTC with calendar. It targets embedded control in industrial HMI, motor drive feedback systems, and smart sensor nodes requiring integrated analog peripherals and robust communication.

For engineers reviewing the STM32F091VCH6 datasheet, STM32F091VCH6 pinout, STM32F091VCH6 application, or STM32F091VCH6 equivalent, key selection criteria include its 100-pin UFBGA footprint, 2.0–3.6 V supply range, 5V-tolerant I/Os (69 pins), CAN + USB-capable USARTs, and hardware CRC unit for firmware integrity verification.

Technical Context

The STM32F091VCH6 integrates an ARM Cortex-M0 core with tightly coupled NVIC, supporting nested interrupts and low-latency peripheral response. Its memory subsystem includes 256 KB Flash with error correction, 32 KB SRAM with hardware parity, and dedicated boot ROM with system memory loader.

Clock architecture combines multiple oscillators: 4–32 MHz external crystal, 32 kHz LSE for RTC, internal 8 MHz HSI with PLL (up to 48 MHz), and factory-trimmed 48 MHz HSI48 for USB timing. Power management supports Sleep, Stop, and Standby modes with programmable voltage detector (PVD) and VBAT backup for RTC registers.

Key Specifications

Pinout & Package

STM32F091VCH6 uses a 100-ball UFBGA (7 × 7 mm, 0.5 mm pitch) package compliant with ECOPACK®2 environmental standards. Ball pitch and layout support high-density PCB routing while maintaining thermal performance for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F072VBT6, the STM32F091VCH6 adds CAN and dual DAC at identical package size; versus STM32F303VCT6, it trades FPU and speed for integrated CAN and lower power consumption in Stop mode (0.4 µA vs 1.7 µA).

Availability

STM32F091VCH6 is available at Aetrix Electronics and suitable for industrial motor control, smart building sensor nodes, automotive body electronics, and portable medical diagnostics requiring stable component supply across extended product lifecycles.

Supply support for STM32F091VCH6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32F0 series delivers entry-level Cortex-M0 performance with rich analog integration and industrial-grade reliability - optimized for cost-sensitive embedded applications needing precision timing, mixed-signal control, and robust communication interfaces.

FAQ

What is the maximum operating frequency and supported voltage range for STM32F091VCH6?

The STM32F091VCH6 operates at up to 48 MHz using its internal HSI48 oscillator or external crystal with PLL. Its digital supply (VDD) ranges from 2.0 V to 3.6 V, and analog supply (VDDA) matches VDD up to 3.6 V. The device guarantees full functionality across this range, including ADC accuracy and I/O drive strength, per datasheet Section 6.3.1.

Does STM32F091VCH6 support hardware debug and trace capabilities?

Yes - it features Serial Wire Debug (SWD) via PA13 (SWDIO) and PA14 (SWCLK), supporting full JTAG/SWD protocol for programming, breakpoint setting, and real-time variable inspection. It does not include Embedded Trace Macrocell (ETM) or instruction trace, but SWD provides sufficient visibility for most firmware development and validation workflows.

How many 5V-tolerant I/O pins does STM32F091VCH6 have, and which ports include them?

The STM32F091VCH6 has 69 5V-tolerant I/O pins distributed across GPIO ports A through F. Specifically, all pins on PA, PB, PC, PD, and PF are 5V-tolerant except PA11/PA12 (USB D+/D−), while PE pins are not 5V-tolerant. This is confirmed in Section 3.7 and Table 13 of the datasheet (DocID026284 Rev 4).

Is the STM32F091VCH6 pin-compatible with other STM32F091x variants in UFBGA100 package?

Yes - STM32F091VCH6 shares identical UFBGA100 pinout and ball assignment with all other 'V' suffix variants (e.g., STM32F091VCH6, STM32F091VCT6, STM32F091VCH7). Differences lie only in Flash size (256 KB vs 128 KB), temperature grade, and revision - enabling drop-in replacement within same memory and grade requirements.