STMicroelectronics STM32F091RCY7TR

Overview

STM32F091RCY7TR 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 2.0–3.6 V supply. It delivers up to 48 MHz CPU performance and supports industrial motor control, smart sensor hubs, and CAN-based automotive body electronics.

For engineers reviewing the STM32F091RCY7TR datasheet, STM32F091RCY7TR pinout, STM32F091RCY7TR application, or STM32F091RCY7TR equivalent, key selection criteria include CAN interface support, 5V-tolerant I/O count (69 pins), RTC with calibration, SWD debug capability, and UFBGA64 package thermal performance for space-constrained embedded designs.

Technical Context

This MCU integrates an ARM Cortex-M0 core with hardware CRC unit, programmable voltage detector (PVD), and three low-power modes (Sleep/Stop/Standby) with RTC and backup register retention via VBAT. Its clock system combines 4–32 MHz HSE, 32 kHz LSE, and factory-trimmed 48 MHz HSI48 oscillator with automatic synchronization.

The analog subsystem includes two independent 12-bit DAC channels, one 12-bit ADC with 16 input channels and 0–3.6 V range, two fast comparators with programmable hysteresis, and 24-channel capacitive touch sensing controller - all sharing a dedicated 2.4–3.6 V analog supply (VDDA).

Key Specifications

Pinout & Package

STM32F091RCY7TR is housed in a 64-pin Ultra-Fine Pitch Ball Grid Array (UFBGA64) package with 0.5 mm ball pitch and 5 mm × 5 mm footprint. This RoHS-compliant ECOPACK®2 package supports high-density routing and efficient thermal dissipation in industrial and automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F091RCY7TR, the STM32F072RBT6 reduces integration (no CAN, single DAC) and package density, while the STM32F091VCT6 trades miniaturization for expandability - making the RCY7TR optimal for CAN-enabled, space-constrained industrial nodes requiring dual analog output precision.

Availability

STM32F091RCY7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor hubs, and automotive body electronics requiring stable component supply and long-term production support.

Supply support for STM32F091RCY7TR 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, energy-efficient embedded applications requiring ARM Cortex-M0 performance, rich analog integration, and industrial-grade reliability - with the F091 line extending functionality to include CAN and enhanced capacitive touch.

FAQ

What is the maximum operating frequency and supported voltage range for STM32F091RCY7TR?

The STM32F091RCY7TR operates at up to 48 MHz CPU frequency with a supply voltage range of 2.0 V to 3.6 V for digital I/Os and 2.4 V to 3.6 V for analog circuits (VDDA). The internal 48 MHz HSI48 oscillator is factory-trimmed to ±2% accuracy and supports USB-free clocking for CAN and I2S interfaces.

Does STM32F091RCY7TR support hardware-accelerated cryptographic functions?

No, the STM32F091RCY7TR does not include hardware cryptographic accelerators such as AES, SHA, or PKA engines. It relies on software libraries for encryption tasks. For secure boot or data confidentiality, external secure elements or higher-series STM32 devices (e.g., STM32L5, STM32H5) are recommended.

How many 5V-tolerant I/O pins does STM32F091RCY7TR have, and which ports support independent VDDIO2?

STM32F091RCY7TR features up to 69 5V-tolerant I/O pins across GPIO ports A through F. Nineteen of these - including PA0–PA7, PB0–PB7, PC0–PC3, and PD0–PD2 - support independent VDDIO2 supply, enabling direct interfacing with 5V peripherals without external level shifters.

What debug interface is supported, and what are the minimum required pins?

The STM32F091RCY7TR supports Serial Wire Debug (SWD) using only two pins: SWDIO (PA13) and SWCLK (PA14). No reset pin is mandatory for basic debug operations, though NRST improves reliability during firmware updates and recovery sequences.