STMicroelectronics STM32F091VBT7

Overview

STM32F091VBT7 from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller in LQFP100 package, featuring 256 KB Flash, 32 KB SRAM with hardware parity, integrated CAN 2.0B interface, dual 12-bit DAC channels, and 12-bit ADC with 16 input channels. It operates from 2.0–3.6 V and supports industrial motor control, smart sensor hubs, and CAN-based building automation systems.

For engineers reviewing the STM32F091VBT7 datasheet, STM32F091VBT7 pinout, STM32F091VBT7 application, or STM32F091VBT7 equivalent, key selection criteria include CAN interface compliance, 48 MHz max CPU frequency, 88 GPIOs (69 5V-tolerant), RTC with calendar and alarm, and SWD debug support - all verified per ST DocID026284 Rev 4.

Technical Context

This MCU integrates an ARM Cortex-M0 core with deterministic 48 MHz execution, coupled with a multi-source clock system: 4–32 MHz external crystal, 32 kHz RTC oscillator, internal 8 MHz RC with PLL, and factory-trimmed 48 MHz HSI48 oscillator for USB/CAN timing accuracy. Memory subsystem includes ECC-capable SRAM and Flash with CRC unit for firmware integrity.

Peripheral architecture features a 12-channel DMA controller, advanced-control timer (TIM1) for 6-channel PWM, seven general-purpose timers, two I²C interfaces (one Fast Mode Plus), eight USARTs (three with ISO7816/LIN/IrDA), two SPI/I²S, and HDMI-CEC wakeup - all mapped to 88 GPIOs with flexible remapping and 5V-tolerance on selected pins.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch), ECOPACK®2-compliant, 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 STM32F091VBT7 adds native CAN and doubles Flash/SRAM - critical for automotive diagnostics and firmware-over-air. Versus STM32F303VCT6, it trades FPU and op-amps for guaranteed CAN 2.0B compliance and lower power consumption in Stop mode.

Availability

STM32F091VBT7 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor hubs, and CAN-based building automation systems requiring stable component supply across extended product lifecycles.

Supply support for STM32F091VBT7 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 targets cost-sensitive, resource-constrained embedded applications requiring robust peripherals, low power, and industrial-grade reliability - optimized for motor control, HMI, and fieldbus edge nodes.

FAQ

What is the maximum operating frequency and voltage range for the STM32F091VBT7?

The STM32F091VBT7 operates at up to 48 MHz CPU frequency with a supply voltage range of 2.0 V to 3.6 V for digital I/O and core logic. The analog supply (VDDA) must be between 2.4 V and 3.6 V and tied to VDD. All specifications are validated per ST's production datasheet DocID026284 Rev 4, including timing margins at full temperature range (–40 °C to +85 °C).

Does the STM32F091VBT7 support CAN FD or only classical CAN 2.0B?

The STM32F091VBT7 supports only classical CAN 2.0B (ISO 11898-1), not CAN FD. Its bxCAN peripheral implements standard 11-bit and 29-bit identifier frames with programmable bit timing, automatic retransmission, and message filtering - confirmed in Section 3.20 of the official datasheet. CAN FD requires higher clock rates and enhanced buffer structures not present in this F0-series device.

How many 5V-tolerant I/O pins does the STM32F091VBT7 have, and which packages support them?

The STM32F091VBT7 has up to 69 5V-tolerant I/O pins, all available in the LQFP100 package (as indicated in Table 1 and Section 3.7 of the datasheet). This tolerance applies regardless of VDD level (2.0–3.6 V) and is electrically verified per I/O AC characteristics in Table 55. Pins are marked "FT" in the pin definition table (Table 13), and no external level-shifting is required for 5 V logic interfacing.

Is the internal 48 MHz oscillator (HSI48) calibrated and usable for USB or CAN timing without an external crystal?

Yes - the HSI48 oscillator is factory-calibrated to ±0.5 % accuracy over temperature and voltage, and is explicitly qualified for USB and CAN clocking per Section 6.3.8 and Section 3.20 of the datasheet. It supports automatic trimming via USB SOF or CAN synchronization signals, eliminating need for external 48 MHz crystal in cost-sensitive CAN node or USB device designs.