STMicroelectronics STM32F091VCT6TR

Overview

STM32F091VCT6TR 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), operating at up to 48 MHz across 2.0–3.6 V supply. It targets industrial control nodes requiring real-time CAN communication, analog signal generation, and capacitive touch sensing.

For engineers reviewing the STM32F091VCT6TR datasheet, STM32F091VCT6TR pinout, STM32F091VCT6TR application, or STM32F091VCT6TR equivalent, key selection factors include its 100-pin LQFP package, 88 fast I/Os (69 with 5V tolerance), hardware CRC unit, RTC with calendar and alarm, and support for HDMI CEC wakeup - all critical for deterministic embedded control and human-interface systems.

Technical Context

The device integrates an ARM Cortex-M0 core with tightly coupled peripherals including a 16-bit 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), and two SPIs multiplexed with I²S. Its clock system combines internal oscillators (HSI48 with auto-trimming, 8 MHz RC + PLL, 40 kHz RC) and external sources (4–32 MHz HSE, 32.768 kHz LSE).

Power architecture supports three low-power modes (Sleep, Stop, Standby) with programmable voltage detector (PVD), VBAT backup for RTC/registers, and separate analog supply (VDDA = 2.4–3.6 V). The 12-channel DMA controller enables efficient peripheral-to-memory transfers without CPU intervention, essential for concurrent analog acquisition, CAN messaging, and display update tasks.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch), ECOPACK®2-compliant, with exposed thermal pad for enhanced heat dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072VBT6, the STM32F091VCT6TR adds CAN, dual DAC, and 24-channel TSC - enabling richer HMI and industrial networking without external ICs. Versus STM32F303VCT6, it trades FPU and op-amps for lower power and cost, making it optimal for deterministic control where integer math suffices.

Availability

STM32F091VCT6TR is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, smart energy meters, and portable medical monitors requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for STM32F091VCT6TR 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 products for industrial, automotive, and consumer markets.

The STM32F0 series delivers entry-level Cortex-M0 performance with rich analog integration and robust communication peripherals - engineered specifically for cost-sensitive, low-power embedded control applications demanding high reliability and long-term supply stability.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32F091VCT6TR operates at up to 48 MHz with a digital supply voltage (VDD) range of 2.0 V to 3.6 V and analog supply (VDDA) from 2.4 V to 3.6 V. All specifications in the datasheet - including ADC accuracy, DAC linearity, and I/O timing - are guaranteed across this full voltage and temperature range (–40°C to +85°C), with no derating required.

Does this MCU support hardware-based cryptographic functions?

No, the STM32F091VCT6TR does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For hardware crypto, consider STM32L4 or STM32H7 series MCUs with CryptoCell or HASH/AES peripherals - the F091 is optimized for deterministic real-time control, not security-intensive applications.

Can the internal 48 MHz oscillator (HSI48) be used as the system clock source?

Yes, the HSI48 oscillator can serve as the main system clock via the RCC configuration registers. It features automatic trimming against an external synchronization signal (e.g., USB SOF), achieving ±2% accuracy over temperature and voltage - sufficient for USB device mode and general-purpose timing without an external crystal.

What is the purpose of the VDDIO2 supply pin and which pins use it?

VDDIO2 powers 19 specific I/Os (PA[15:12], PB[15:12], PC[15:12], PD[15:12], PE[15:12], PF[15:12]) independently from VDD. This allows interfacing with external devices operating at different logic levels (e.g., 1.8 V sensors) without level shifters, while maintaining full 5V-tolerance on the remaining 69 pins powered by VDD.