STMicroelectronics STM32F091VCT6

Overview

STM32F091VCT6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 256 KB Flash, 32 KB SRAM, integrated CAN 2.0B interface, dual 12-bit DAC, and 12-bit ADC (1.0 µs conversion) - deployed in industrial motor control, smart metering, and automotive body electronics where real-time CAN communication and mixed-signal precision are required.

For engineers reviewing the STM32F091VCT6 datasheet, STM32F091VCT6 pinout, STM32F091VCT6 application, or STM32F091VCT6 equivalent, key selection considerations include its 100-pin LQFP package, 48 MHz max CPU frequency, VDD/VDDA operating range (2.0–3.6 V), and support for capacitive touch sensing across 24 channels.

Technical Context

This MCU implements an ARM Cortex-M0 core with Harvard architecture, hardware CRC unit, and nested vectored interrupt controller (NVIC) supporting up to 72 interrupts. It integrates dual clock domains: high-speed (HSE/HSI48/PLL) and low-power (LSE/LSI), enabling precise RTC operation and sub-millisecond wakeup from Stop mode.

The peripheral set includes one advanced-control timer (TIM1) for 6-channel PWM, two I²C interfaces (one Fast Mode Plus at 1 Mbit/s), eight USARTs (three with ISO7816/LIN/IrDA), two SPI/I²S modules, and HDMI-CEC receiver - all mapped to configurable GPIOs with 5V-tolerant capability on up to 69 pins.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant ECOPACK®2, rated for industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072VBT6, the STM32F091VCT6 adds CAN and dual DAC at identical package size; versus STM32F303VCT6, it trades FPU and ADC speed for integrated touch sensing and lower power consumption in Stop mode.

Availability

STM32F091VCT6 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, and automotive body electronics requiring stable component supply and long-term manufacturing continuity.

Supply support for STM32F091VCT6 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, low-power embedded applications demanding ARM Cortex-M0 performance, rich analog integration, and industrial-grade reliability - optimized for motor control, metering, and HMI subsystems.

FAQ

Does STM32F091VCT6 support USB device functionality?

No. Although it has PA11/PA12 pins labeled DP/DM in the pinout table, the USB peripheral is not implemented in the STM32F091xC silicon. These pins are unconnected internally and must be left floating or tied to VSS per ST's layout recommendations.

What is the maximum allowed ADC input voltage range?

The ADC input voltage must stay within 0 to VREF+ (typically VDDA). With VDDA = 3.6 V, the full-scale range is 0–3.6 V. Exceeding this risks damage or measurement saturation; external scaling resistors or clamping diodes are required for higher-voltage signals.

Can the internal 48 MHz oscillator (HSI48) be used for USB clocking?

No - the STM32F091VCT6 does not include a USB peripheral, so HSI48 is used exclusively for system clock derivation and CAN bit timing. Its ±2% accuracy after auto-trimming meets CAN FD requirements but is irrelevant to USB.

How many independent power domains does STM32F091VCT6 have?

It has two independent analog domains: VDDA supplies the ADC, DAC, comparators, and temperature sensor; VBAT powers the RTC and backup registers. Digital logic uses VDD. VDDA must be ≥ VDD and ≤ 3.6 V; VBAT operates down to 1.8 V for RTC retention.