STMicroelectronics STM32G071CBU6

Overview

STM32G071CBU6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 128 KB Flash, 36 KB SRAM, and operating voltage range of 1.7–3.6 V. It integrates dual 12-bit DACs, 12-bit ADC (0.4 µs conversion), four USARTs (including ISO7816/LIN support), and USB Type-C™ Power Delivery controller - deployed in smart metering, industrial sensor nodes, and low-power HMI control panels.

For engineers reviewing the STM32G071CBU6 datasheet, STM32G071CBU6 pinout, STM32G071CBU6 application, or STM32G071CBU6 equivalent, key selection criteria include its 64 MHz max CPU frequency, 60 GPIOs (with 5 V-tolerance on selected pins), RTC with periodic wakeup from Stop/Standby, and dual DAC + comparator analog subsystem for closed-loop actuator control.

Technical Context

The STM32G071CBU6 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU), supporting TrustZone-like secure boot via securable flash area and hardware parity on 32 KB of SRAM. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and ±1% internal 16 MHz RC oscillator with PLL - enabling precise timing for real-time motor control and communication stacks.

Analog subsystem includes two rail-to-rail comparators with programmable hysteresis and input routing, plus a 12-bit ADC with hardware oversampling up to 16-bit resolution and 16 external channels. Communication interfaces feature two Fast-mode Plus I²C (1 Mbit/s), four USARTs (two with IrDA/LIN/ISO7816), two SPIs (32 Mbit/s), and dedicated USB Type-C PD controller logic - all accessible via flexible GPIO remapping.

Key Specifications

Pinout & Package

STM32G071CBU6 uses the UFQFPN48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow ST's standard STM32G0 series layout, supporting full peripheral remapping across GPIO ports A–F.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071RBT6, the CBU6 saves >60% board area while maintaining identical analog/peripheral performance; versus STM32G081KBT6, it omits crypto accelerators but reduces BOM cost by ~18% in volume production - ideal for cost-sensitive, non-certified embedded controls.

Availability

STM32G071CBU6 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and human-machine interface applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across manufacturing lots.

Supply support for STM32G071CBU6 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, MEMS, and automotive-grade components since 1987.

The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications - emphasizing fast time-to-market via seamless migration from legacy 8-bit platforms and integration of essential analog/comms peripherals in compact packages.

FAQ

What is the maximum operating frequency of the STM32G071CBU6 core?

The STM32G071CBU6 features an Arm Cortex-M0+ core rated for up to 64 MHz operation. This frequency is achievable using the internal 16 MHz RC oscillator with PLL multiplication or an external crystal up to 48 MHz. All peripherals remain fully functional at this speed, and timing parameters in the datasheet (DS12232 Rev 5, Section 5.3.24) confirm guaranteed operation across the full –40°C to 125°C temperature range.

Does the STM32G071CBU6 support hardware encryption?

No, the STM32G071CBU6 does not include hardware AES or PKA accelerators. It provides basic security features such as readout protection (RDP), securable flash area, and 96-bit unique ID, but lacks cryptographic co-processors found in the G081 or G4 series. For applications requiring AES-128 or SHA-256 acceleration, ST recommends the STM32G081KBT6 or STM32G431KB.

Can the STM32G071CBU6 drive 5 V logic directly?

Yes - up to 45 GPIO pins on the STM32G071CBU6 are 5 V-tolerant when configured as inputs, meaning they safely accept 0–5 V signals while powered from 1.7–3.6 V. However, output voltage swing remains limited to VDD (max 3.6 V), so external level shifters are required for driving true 5 V loads. Pin tolerance status is explicitly listed in Table 12 (Pin assignment and description) of DS12232 Rev 5.

What debugging interface does the STM32G071CBU6 use?

The STM32G071CBU6 supports Serial Wire Debug (SWD) via dedicated SWCLK and SWDIO pins (PA14 and PA13 by default). It does not support JTAG. SWD enables full debug functionality - including breakpoints, watchpoints, memory inspection, and flash programming - using standard tools like ST-LINK/V2, SEGGER J-Link, or CMSIS-DAP adapters. No additional configuration or bootloader activation is required beyond enabling SWD in the system initialization code.