STMicroelectronics STM32G071CBU3

Overview

STM32G071CBU3 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 128 KB Flash, 36 KB SRAM, dual 12-bit DACs, 12-bit ADC (0.4 µs conversion), and USB Type-C™ Power Delivery controller. It operates from 1.7–3.6 V across –40°C to 105°C and integrates 14 timers-including two 128 MHz-capable advanced timers-for motor control in compact industrial edge nodes.

For engineers reviewing the STM32G071CBU3 datasheet, STM32G071CBU3 pinout, STM32G071CBU3 application, or STM32G071CBU3 equivalent, key selection criteria include its 64 MHz max CPU frequency, 60 fast I/Os (including 5 V-tolerant pins), hardware CRC unit, securable flash area, and dual low-power analog comparators with rail-to-rail operation.

Technical Context

The STM32G071CBU3 implements an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via readout protection (RDP) levels and securable flash regions. Its clock system combines four oscillators-HSE (4–48 MHz), LSE (32.768 kHz), HSI16 (±1%), and LSI (±5%)-with a programmable PLL for precise timing in mixed-signal applications.

Peripheral interconnect uses a flexible AHB/APB matrix enabling concurrent DMA transfers across 7-channel DMA controller and multiple remappable USART/I2C/SPI interfaces. The device supports full SWD debug, 96-bit unique ID, and ECOPACK2-compliant UFQFPN48 packaging with thermal pad for industrial reliability.

Key Specifications

Pinout & Package

STM32G071CBU3 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package with exposed thermal pad (A0B9 variant), measuring 7 mm × 7 mm × 0.55 mm. This RoHS-compliant, ECOPACK2-qualified package supports high-density PCB layouts and efficient thermal dissipation in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071CBT3, the CBU3 provides superior thermal performance in dense layouts; versus STM32G081CBU3, it delivers identical real-time control capability without crypto overhead-ideal for cost-sensitive industrial control where security is handled externally.

Availability

STM32G071CBU3 is available at Aetrix Electronics and suitable for smart energy metering, industrial motor drives, USB-C portable chargers, and IoT edge sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32G071CBU3 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 STM32G0 series targets cost-sensitive, resource-constrained embedded applications demanding high integration, low power, and robust security features-optimized for industrial control, appliance HMI, and USB-C power ecosystems.

FAQ

What is the maximum operating frequency of the STM32G071CBU3?

The STM32G071CBU3 features an Arm Cortex-M0+ core rated for up to 64 MHz operation. This frequency is achievable using the internal HSI16 oscillator with PLL multiplication or an external HSE crystal. All peripherals-including timers, ADC, and communication interfaces-are fully functional at this speed, with timing specifications validated across the full –40°C to 105°C temperature range and 1.7–3.6 V supply.

Does the STM32G071CBU3 support hardware encryption?

No, the STM32G071CBU3 does not include hardware cryptographic accelerators such as AES, DES, or TRNG. It relies on software-based encryption libraries for security functions. For hardware-accelerated cryptography, ST recommends the pin-compatible STM32G081CBU3, which adds AES-128 and TRNG while retaining identical peripheral sets and package dimensions.

What debug interface does the STM32G071CBU3 use?

The STM32G071CBU3 supports Serial Wire Debug (SWD) via dedicated SWDIO and SWCLK pins (PA13 and PA14 by default). It does not support JTAG. SWD provides full breakpoint, watchpoint, and memory access capabilities using a 2-pin interface, minimizing PCB routing complexity while maintaining full development visibility during firmware bring-up and validation.

Can the STM32G071CBU3 operate from a single 3.3 V supply?

Yes, the STM32G071CBU3 operates across a 1.7–3.6 V supply range, making 3.3 V a fully supported and commonly used nominal voltage. At 3.3 V, the device delivers full 64 MHz performance, all I/Os remain 5 V-tolerant where specified, and analog peripherals (ADC/DAC/comparators) meet datasheet accuracy specs. No level-shifting is required for standard 3.3 V system integration.