STMicroelectronics STM32F091VCH7

Overview

STM32F091VCH7 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFBGA100 package, featuring 256 KB Flash, 32 KB SRAM with hardware parity, integrated CAN 2.0B interface, dual 12-bit DACs, and 12-bit ADC (1.0 µs conversion) - deployed in industrial motor control, smart metering, and CAN-based gateway nodes requiring real-time analog I/O and robust communication.

For engineers reviewing the STM32F091VCH7 datasheet, STM32F091VCH7 pinout, STM32F091VCH7 application, or STM32F091VCH7 equivalent, key selection criteria include CAN interface support, 5V-tolerant GPIO count (up to 69), VDDIO2 independent supply capability, HSI48 oscillator with auto-trimming, and RTC with calendar and alarm functionality.

Technical Context

The STM32F091VCH7 implements an ARM Cortex-M0 core running up to 48 MHz, paired with a 48 MHz internal HSI48 oscillator calibrated via external synchronization. Its memory subsystem includes 256 KB of Flash with error correction and 32 KB of SRAM with hardware parity checking for safety-critical operation.

Power management integrates programmable voltage detector (PVD), POR/PDR, and three low-power modes (Sleep, Stop, Standby) with RTC and backup registers retained on VBAT. Clock architecture supports dual oscillators: 4–32 MHz HSE and 32 kHz LSE for RTC, plus 8 MHz HSI with PLL multiplication.

Key Specifications

Pinout & Package

STM32F091VCH7 is housed in a 100-ball UFBGA package (7 × 7 mm, 0.5 mm pitch), optimized for high-density PCB layouts and thermal performance in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F091VCH7, STM32F072VBT6 sacrifices CAN and analog output flexibility for smaller code footprint and USB, while STM32F098VCT6 extends connectivity at the cost of higher unit price and increased layout complexity - making STM32F091VCH7 optimal for cost-sensitive, CAN-centric industrial edge nodes.

Availability

STM32F091VCH7 is available at Aetrix Electronics and suitable for industrial motor control, smart metering, automotive body electronics, and CAN-based gateway applications requiring stable component supply, long lifecycle assurance, and qualified production lots.

Supply support for STM32F091VCH7 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, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs with broad industrial and automotive qualification coverage.

The STM32F0 series targets cost-sensitive, entry-level embedded applications demanding Cortex-M0 performance, rich analog integration, and industrial-grade reliability - optimized for appliances, HVAC controls, and basic industrial automation.

FAQ

What is the maximum operating temperature range for STM32F091VCH7?

The STM32F091VCH7 is specified for industrial temperature range: –40°C to +85°C. This rating applies across all electrical characteristics in the datasheet, including ADC accuracy, oscillator stability, and I/O drive strength. The UFBGA100 package's thermal resistance (θ_JA = 35°C/W) supports reliable operation under continuous 48 MHz CPU load in enclosed enclosures with minimal airflow.

Does STM32F091VCH7 support hardware cryptographic acceleration?

No, the STM32F091VCH7 does not include dedicated cryptographic hardware blocks such as AES, SHA, or PKA engines. It relies on software libraries (e.g., Mbed TLS) for encryption tasks. For hardware-accelerated crypto, consider STM32L4x or STM32G0x families - the F091's security features are limited to 96-bit unique ID and write-protection for Flash sectors.

Can the internal 48 MHz HSI48 oscillator be used as system clock without external crystal?

Yes, the HSI48 oscillator can serve as the system clock source directly, with automatic trimming based on USB SOF or external synchronization signals. Its typical accuracy is ±2% over temperature and voltage, sufficient for UART communication (with oversampling) and non-critical timing - though external HSE is required for full USB FS compliance or precise RTC calibration.

How many I/O pins support independent VDDIO2 supply on STM32F091VCH7?

Exactly 19 I/O pins (PA[15:12], PB[15:12], PC[15:12], PD[15:12], PE[15:12]) support independent VDDIO2 supply. These pins are grouped in four-port banks and must share the same VDDIO2 voltage level (1.65–3.6 V). This feature enables direct interfacing with lower-voltage peripherals (e.g., 1.8 V sensors or FPGAs) without level shifters.