STMicroelectronics STM32F072CBT6

Overview

STM32F072CBT6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0 microcontroller with 128 KB Flash, 16 KB SRAM, crystal-less USB 2.0 FS interface, CAN 2.0B controller, and integrated 12-bit ADC/DAC. It operates from 2.0–3.6 V, supports up to 48 MHz CPU frequency, and targets embedded control systems requiring mixed-signal integration, real-time communication, and low-power operation - such as industrial sensor nodes and USB-connected human interface devices.

For engineers reviewing the STM32F072CBT6 datasheet, STM32F072CBT6 pinout, STM32F072CBT6 application, or STM32F072CBT6 equivalent, key selection considerations include its internal 48 MHz oscillator with USB BCD/LPM support, 5V-tolerant I/Os (up to 68 pins), dual DAC channels, RTC with calendar and wakeup from Stop/Standby, and hardware CRC unit for firmware integrity verification.

Technical Context

The STM32F072CBT6 integrates an Arm Cortex-M0 core with tightly coupled NVIC, supporting nested interrupts and low-latency response. Its clock system combines internal oscillators (HSI48 for USB, HSI8 with PLL, LSI, LSE) and external sources (4–32 MHz HSE, 32.768 kHz LSE), enabling precise timing for USB frame synchronization and RTC calibration without external crystals.

Peripheral architecture includes a 7-channel DMA controller, advanced-control timer (TIM1) for 6-channel PWM, two independent comparators with programmable inputs, and a touch-sensing controller (TSC) supporting up to 24 capacitive sensing channels - all mapped to GPIOs with flexible alternate function remapping via AFR registers.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant ECOPACK®2, 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 STM32F072CBT6, STM32F070CBT6 reduces cost and size at the expense of USB autonomy and CAN capability, while STM32F091CBT6 trades CAN for USB OTG and extra RAM - making STM32F072CBT6 the optimal balance for USB-connected, CAN-enabled edge nodes requiring minimal external components.

Availability

STM32F072CBT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB human interface devices, smart meter communication modules, and low-power building automation nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32F072CBT6 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 management 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 USB/CAN connectivity - engineered specifically for cost-sensitive, resource-constrained embedded applications demanding high reliability and long-term availability.

FAQ

Does STM32F072CBT6 support USB device mode without an external crystal?

Yes. The STM32F072CBT6 integrates an internal 48 MHz HSI48 oscillator with automatic trimming synchronized to USB Start-of-Frame (SOF) tokens. This enables full-speed USB device operation without any external crystal or oscillator, reducing BOM cost and PCB area while maintaining ±0.25% accuracy required for USB compliance.

What is the maximum number of 5V-tolerant I/Os on STM32F072CBT6?

The STM32F072CBT6 supports up to 68 5V-tolerant I/Os across GPIO ports A, B, C, and D. These pins tolerate voltages up to 5.5 V regardless of VDD level (2.0–3.6 V), enabling direct interfacing with legacy 5V peripherals such as RS-232 transceivers, optocouplers, and industrial sensors without external level shifters.

Can the internal DAC outputs drive standard audio line-level signals?

No. Each of the two 12-bit DAC channels delivers rail-to-rail output (0–VDD) with typical output impedance of ~15 kΩ and limited drive strength (±5 mA). Driving line-level audio requires external op-amp buffering and AC coupling; however, the DACs are well-suited for precision reference generation, sensor biasing, and closed-loop analog control.

How does the touch-sensing controller (TSC) achieve noise immunity in industrial environments?

The TSC uses spread-spectrum charge-transfer acquisition with built-in digital filtering, shield electrode support, and synchronous sampling referenced to internal clocks. It achieves >4 kV ESD immunity and operates reliably under 10 Vpp conducted noise - validated per IEC 61000-4-6 - making it suitable for factory-floor HMI panels without additional shielding or guard traces.