STMicroelectronics STM32F091CCT7TR

Overview

STM32F091CCT7TR 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). It operates from 2.0–3.6 V, supports up to 48 MHz CPU frequency, and targets industrial control nodes requiring real-time communication, analog signal generation, and capacitive touch sensing.

For engineers reviewing the STM32F091CCT7TR datasheet, STM32F091CCT7TR pinout, STM32F091CCT7TR application, or STM32F091CCT7TR equivalent, key selection criteria include CAN bus integration, 5V-tolerant I/O count (69 pins), RTC with calibration, SWD debug support, and UFBGA100 package compatibility for high-density PCB layouts.

Technical Context

This MCU integrates an ARM Cortex-M0 core with hardware CRC unit, programmable voltage detector (PVD), and multiple clock sources including 4–32 MHz external crystal, 32 kHz RTC oscillator, and factory-trimmed 48 MHz internal HSI48 oscillator. Its power architecture supports Sleep, Stop, and Standby modes with VBAT backup for RTC and registers.

The peripheral set includes one advanced-control timer (TIM1) for 6-channel PWM, seven general-purpose timers, two I²C interfaces (one with SMBus/PMBus), eight USARTs (three with ISO7816), two SPI/I²S modules, and HDMI-CEC wakeup-enabling mixed-signal, communication-rich embedded systems without external timing or interface ICs.

Key Specifications

Pinout & Package

STM32F091CCT7TR is housed in a 100-pin UFBGA package (7 × 7 mm, 0.5 mm pitch) with 88 user-accessible I/Os, including 69 5V-tolerant pins and 19 pins on independent VDDIO2 supply. The package supports fine-pitch PCB routing and thermal dissipation suitable for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072CBT6, STM32F091CCT7TR adds CAN and dual DAC at the cost of USB; versus STM32F303CCT6, it trades FPU and higher clock stability for lower power and cost in deterministic control applications.

Availability

STM32F091CCT7TR is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart energy metering, and human-machine interface applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for STM32F091CCT7TR 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing and broad industrial certification coverage.

The STM32F0 series delivers entry-level Cortex-M0 performance with rich analog integration and industrial-grade reliability, designed specifically for cost-sensitive, resource-constrained embedded systems requiring CAN, touch, and low-power operation.

FAQ

What is the maximum operating temperature range for STM32F091CCT7TR?

The STM32F091CCT7TR is specified for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 6.3.1 of the datasheet (DocID026284 Rev 4), where electrical characteristics and thermal derating are validated across this range. No extended or automotive grade variants exist for this specific part number.

Does STM32F091CCT7TR support USB device functionality?

No, STM32F091CCT7TR does not integrate a USB physical layer. Unlike some other STM32F0 variants (e.g., STM32F042 or STM32F072), this part omits the USB transceiver and related pins. PA11/PA12 are available as general-purpose I/O or alternate functions (e.g., USART2), but cannot be used for USB communication.

How many I/O pins support 5V tolerance, and are they configurable per port?

Exactly 69 I/O pins are 5V-tolerant, distributed across GPIO ports A, B, C, D, and E - as documented in Table 2 and Section 3.7 of the datasheet. This capability is fixed per pin and not software-configurable; tolerance applies regardless of VDD level (2.0–3.6 V) and requires no external components.

Is the internal 48 MHz oscillator (HSI48) factory-trimmed, and what is its accuracy?

Yes, the HSI48 oscillator is factory-trimmed and specified for ±0.25% accuracy over the full temperature and voltage range (–40 °C to +85 °C, 2.0–3.6 V), per Table 43 in the datasheet. It supports automatic synchronization to external signals via the Clock Recovery System (CRS), enabling USB-free timing in applications requiring stable 48 MHz clocks.