STMicroelectronics STM32F091VCT7

Overview

STM32F091VCT7 from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 256 KB Flash, 32 KB SRAM (with hardware parity), and integrated CAN 2.0B interface - deployed in industrial motor control, smart metering, and automotive body electronics where real-time deterministic response, analog integration (12-bit ADC + dual 12-bit DAC), and robust communication are required.

For engineers reviewing the STM32F091VCT7 datasheet, STM32F091VCT7 pinout, STM32F091VCT7 application, or STM32F091VCT7 equivalent, key selection criteria include its 48 MHz max CPU frequency, 88 fast I/Os (69 with 5V tolerance), 12-channel DMA, RTC with calendar and alarm, and support for HDMI CEC wakeup - all within LQFP100 package constraints and -40°C to +85°C industrial temperature range.

Technical Context

The STM32F091VCT7 implements a single-cycle ARM Cortex-M0 core with Harvard bus architecture, supporting Thumb-2 instruction set and NVIC with up to 32 interrupt channels. Its clock system integrates four oscillators: 4–32 MHz HSE, 32 kHz LSE for RTC, 8 MHz HSI with PLL (×6 → 48 MHz), and factory-trimmed 48 MHz HSI48 for USB/CEC timing.

Analog subsystem includes one 12-bit, 1.0 µs ADC (16-channel, 0–3.6 V range, separate VDDA supply), two independent 12-bit DACs (1 µA output leakage, monotonic), two programmable analog comparators, and 24-channel capacitive sensing controller - enabling sensor fusion and touch HMI without external components.

Key Specifications

Pinout & Package

LQFP100 package with exposed thermal pad (ECOPACK®2 compliant), 100-pin square layout, 0.5 mm pitch, and 14 × 14 mm footprint - optimized for thermal dissipation in motor drive and power conversion applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072VBT6, the STM32F091VCT7 adds CAN and dual DAC at identical package size; versus STM32F303VCT6, it trades FPU and speed for CEC support and pin compatibility - making it optimal for cost-sensitive, CAN-connected industrial HMI designs.

Availability

STM32F091VCT7 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F091VCT7 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, specializing in microcontrollers, power management, and automotive ICs - with over 40 years of embedded systems expertise and ISO/TS 16949-certified manufacturing.

The STM32F0 series targets cost-sensitive, resource-constrained applications demanding high integration and industrial-grade reliability - designed specifically for entry-level industrial automation, appliance control, and smart sensor nodes.

FAQ

What is the maximum operating temperature range for STM32F091VCT7?

The STM32F091VCT7 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is validated per ST's characterization data (Section 6.3.1, DocID026284 Rev 4), with guaranteed operation across full voltage range (2.0–3.6 V) and all peripherals active at 48 MHz.

Does STM32F091VCT7 support USB connectivity?

No - the STM32F091VCT7 does not include a USB PHY or USB controller. It features HDMI CEC hardware for consumer electronics remote control, but lacks USB device/host capability. For USB-enabled variants, consider STM32F072 or STM32F042 families.

How many I/O pins support 5V tolerance on STM32F091VCT7?

Exactly 69 I/O pins are 5V-tolerant (as specified in Section 3.7, "General-purpose inputs/outputs"), including all pins in GPIO ports A, B, C, D, E, and F except those assigned to analog functions (e.g., ADC inputs, DAC outputs) or specific alternate functions like CAN or CEC. This enables direct interfacing with 5 V logic without level shifters.

Is the internal 48 MHz oscillator (HSI48) calibrated and usable for CEC timing?

Yes - the HSI48 oscillator is factory-trimmed to ±2 % accuracy and supports automatic trimming via external synchronization (e.g., USB SOF or CEC header edge). As confirmed in Section 3.6 and Table 43 of the datasheet, it meets HDMI CEC timing requirements (±5 %) without external crystal, reducing BOM count.