STMicroelectronics STM32G071KBU3

Overview

STM32G071KBU3 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 package, featuring 128 KB Flash, 36 KB SRAM, dual 12-bit DACs, 12-bit ADC with 16 external channels, and operation from 1.7–3.6 V. It integrates USB Type-C Power Delivery controller, four USARTs (two with ISO7816/LIN/IrDA), and supports industrial temperature range (−40°C to 125°C) for smart sensor node control.

For engineers reviewing the STM32G071KBU3 datasheet, STM32G071KBU3 pinout, STM32G071KBU3 application, or STM32G071KBU3 equivalent, key selection criteria include its 125°C extended temperature rating, dual DAC support for analog output generation, USB-C PD controller integration, and 60 fast I/Os with 5 V tolerance - critical for compact industrial HMI and battery-powered edge nodes.

Technical Context

The STM32G071KBU3 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU), running at up to 64 MHz with hardware parity on 32 KB of its 36 KB 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 sensor fusion and low-power wake-up sequences.

Peripheral interconnect is managed via a multi-layer AHB/APB bus matrix supporting concurrent DMA transfers across 7-channel DMA controller with flexible mapping. Analog subsystem includes two rail-to-rail comparators with programmable inputs/outputs, temperature sensor, VREFINT reference, and VBAT monitoring - all accessible during Stop/Standby modes for autonomous battery management.

Key Specifications

Pinout & Package

STM32G071KBU3 is housed in a 5 mm × 5 mm UFQFPN32 package (pitch: 0.5 mm), RoHS-compliant and ECOPACK2-certified, optimized for space-constrained PCB layouts in portable and embedded systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071CBT6, the KBU3 saves 30% board area and improves thermal resistance by 12°C/W; versus STM32G081KBT6, it omits crypto engines but delivers identical analog precision, timing resolution, and low-power behavior - making it optimal for cost-sensitive industrial control where security is handled externally.

Availability

STM32G071KBU3 is available at Aetrix Electronics and suitable for smart sensor nodes, USB-C powered gateways, compact motor drive interfaces, and secure access terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32G071KBU3 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 demanding high integration, robust security features, and extended temperature operation - especially in industrial automation, consumer IoT, and smart metering.

FAQ

What is the maximum operating frequency and core type of the STM32G071KBU3?

The STM32G071KBU3 uses an Arm Cortex-M0+ core rated for up to 64 MHz operation. This frequency is achievable with the internal 16 MHz RC oscillator plus PLL, or directly from an external 4–48 MHz crystal. The core includes a Memory Protection Unit (MPU) and supports Thumb-2 instruction set for efficient code density and real-time determinism.

Does the STM32G071KBU3 support hardware encryption or secure boot features?

The STM32G071KBU3 does not include hardware AES or TRNG blocks. It supports readout protection (RDP) Level 0/1/2, securable Flash area, and option bytes for boot configuration - enabling basic firmware confidentiality and anti-debug measures. For full cryptographic acceleration, ST recommends the pin-compatible STM32G081KBT6 variant.

How many UART/USART interfaces does the STM32G071KBU3 provide, and what advanced protocols do they support?

The STM32G071KBU3 integrates four USARTs and one low-power UART (LPUART). Two USARTs support ISO7816 (smart card), LIN 2.2, IrDA, and auto baud rate detection; all four support synchronous SPI mode. The LPUART remains active in Stop mode and provides wakeup capability - ideal for always-on communication in battery-constrained systems.

What package type and pin count does the STM32G071KBU3 use, and is it RoHS compliant?

The STM32G071KBU3 uses a 32-pin UFQFPN package (5 mm × 5 mm, 0.5 mm pitch) with an exposed thermal pad. It is RoHS-compliant and ECOPACK2-certified, meeting EU Directive 2011/65/EU and halogen-free requirements. The package supports reflow soldering per JEDEC J-STD-020 and is qualified for industrial temperature operation up to 125°C.