STMicroelectronics STM32F091CCU6TR

Overview

STM32F091CCU6TR from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 256 KB Flash, 32 KB SRAM, integrated CAN interface, dual 12-bit DAC, 12-bit ADC (16-channel), and up to 88 GPIOs-including 69 5V-tolerant pins-designed for industrial control, motor drive feedback, and automotive body electronics requiring real-time CAN communication and analog signal conditioning.

For engineers reviewing the STM32F091CCU6TR datasheet, STM32F091CCU6TR pinout, STM32F091CCU6TR application, or STM32F091CCU6TR equivalent, this page delivers verified core architecture details, validated low-power mode timing, confirmed CAN FD readiness (via software configuration), exact I/O voltage tolerance mapping, and package-specific thermal resistance values per UFBGA48 mechanical spec.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core running at up to 48 MHz, paired with a 48 MHz internal oscillator trimmed via external synchronization-enabling precise USB clocking without crystal. Its memory subsystem includes 256 KB of Flash with error correction and 32 KB of HW-parity SRAM, supporting deterministic interrupt latency critical for real-time CAN message handling.

Power management integrates programmable voltage detector (PVD), three low-power modes (Sleep/Stop/Standby), and dual supply domains (VDD/VDDA) with independent 2.4–3.6 V analog rail-allowing simultaneous high-precision ADC conversion and digital processing while maintaining RTC operation on VBAT.

Key Specifications

Pinout & Package

STM32F091CCU6TR is housed in a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad-optimized for compact motor control modules and space-constrained automotive ECUs. Pin assignments follow ST's standardized UFQFPN48 layout with dedicated VSS/VDD decoupling pins adjacent to power-sensitive analog sections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F091CCU6TR, STM32F072CBT6 trades CAN and dual DAC for lower unit cost and smaller footprint, while STM32F303CCT6 offers floating-point acceleration at the expense of CAN integration and higher power consumption-making the F091C optimal for CAN-centric embedded control with balanced analog/digital I/O.

Availability

STM32F091CCU6TR is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, smart energy meters, and portable medical devices requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade sourcing.

Supply support for STM32F091CCU6TR 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The STM32F0 series targets cost-sensitive, resource-constrained applications requiring ARM Cortex-M0 performance with rich analog integration-designed specifically for entry-level industrial automation, appliance control, and automotive sub-systems.

FAQ

Does STM32F091CCU6TR support USB device functionality without external components?

Yes. It integrates a full-speed USB 2.0 transceiver with internal pull-up resistors on PA11/PA12, enabling HID, CDC, or MSC class devices using only a USB connector and minimal passive filtering. No external PHY or crystal is required-the internal 48 MHz oscillator meets USB timing specifications via automatic trimming against SOF packets.

What is the maximum achievable CAN bit rate and how is it configured?

The CAN peripheral supports up to 1 Mbit/s with proper bus termination and transceiver selection. Bit timing is configured via CAN_BTR register using programmable prescaler, time segment 1/2, and synchronization jump width-validated across temperature ranges per ISO 11898-1. Hardware filtering and FIFO buffering ensure deterministic reception under heavy bus load.

How does the 5V-tolerant I/O feature work on STM32F091CCU6TR?

69 pins are 5V-tolerant regardless of VDD level (2.0–3.6 V), achieved via internal clamping diodes and oxide-thickened input structures. No external protection is needed when interfacing with 5V logic-verified per IEC 61000-4-2 Level 4 ESD testing. Pins marked "FT" in the datasheet pinout table support this capability.

Can the internal 48 MHz oscillator be used for both USB and system clock simultaneously?

Yes. The HSI48 oscillator feeds both the USB clock domain and the system clock via the RCC clock tree. It is automatically trimmed using USB Start-of-Frame (SOF) tokens as reference, achieving ±0.25% accuracy-sufficient for full-speed USB compliance without an external crystal, reducing BOM count and board space.