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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32G071CBU3TR

Name: STM32G071CBU3TR
Brand: STMicroelectronics
SKU: STM32G071CBU3TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G071CBU3TR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-UFQFN Exposed Pad

Datasheet:: STM32G071CBU3TR.pdf

Description:: Linear IC's

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Product details

Overview

STM32G071CBU3TR from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 128 KB Flash, 36 KB SRAM, and operating voltage range of 1.7–3.6 V. It integrates dual 12-bit DACs, a 12-bit 0.4 µs ADC (up to 16 external channels), four USARTs (two with ISO7816/LIN/IrDA), and USB Type-C™ Power Delivery controller - deployed in smart metering, industrial sensor nodes, and low-power HMI control panels.

For engineers reviewing the STM32G071CBU3TR datasheet, STM32G071CBU3TR pinout, STM32G071CBU3TR application, or STM32G071CBU3TR equivalent, key selection criteria include its 64 MHz CPU frequency, 60 fast I/Os (multiple 5 V-tolerant), integrated RTC with periodic wakeup from Stop/Standby, and support for SWD debug interface in UFQFPN48 package.

Technical Context

The STM32G071CBU3TR implements an Arm Cortex-M0+ core with MPU, supporting up to 64 MHz operation and hardware parity on 32 KB of its 36 KB SRAM. Its clock system includes dual crystal oscillators (4–48 MHz HSE and 32 kHz LSE with calibration), plus internal RC sources (16 MHz ±1 %, 32 kHz ±5 %) with PLL capability.

Peripheral interconnect uses a dedicated AHB/APB matrix enabling concurrent DMA transfers across 14 timers (including two 128 MHz-capable advanced timers), two I²C interfaces (one Fast-mode Plus at 1 Mbit/s), and flexible SPI/I²S multiplexing - all coordinated via NVIC with 32 interrupt lines and EXTI event routing.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M0+, 64 MHz max - enables deterministic real-time control with low-latency interrupt response (≤12 cycles).
Memory	128 KB Flash (with securable area & protection), 36 KB SRAM (32 KB with HW parity) - supports secure firmware updates and robust data integrity in field-deployed devices.
Analog Peripherals	12-bit ADC (0.4 µs conversion, 16-channel ext.), two 12-bit DACs, two rail-to-rail comparators - suitable for closed-loop analog sensing and actuation without external signal chain components.
Communication	Four USARTs (2x ISO7816/LIN/IrDA), two I²C (1x Fast-mode Plus), two SPI (32 Mbit/s), HDMI CEC, USB Type-C PD controller - enables multi-protocol connectivity in space-constrained edge nodes.
Power Management	1.7–3.6 V supply, Sleep/Stop/Standby/Shutdown modes, programmable BOR/PVD, VBAT backup for RTC - achieves sub-µA standby current for battery-powered applications.
Package & I/O	UFQFPN48 (7 × 7 mm), 46 GPIOs (60 total pins, multiple 5 V-tolerant) - provides high peripheral density in compact industrial PCB layouts.
Debug & Security	Serial Wire Debug (SWD), 96-bit unique ID, readout protection (RDP), securable flash area - meets basic firmware IP protection and production programming requirements.

Pinout & Package

STM32G071CBU3TR is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package with 0.5 mm pitch, 7 × 7 mm body size, and ECOPACK2 compliance. Pin functions are validated per ST's DS12232 Rev 5, Section 4 (Pinouts and Alternate Functions).

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA, VSS, VSSA	Power supply and ground	Dual-domain power (digital/analog) with separate analog ground improves ADC/DAC SNR and noise immunity.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1	General-purpose I/O	46 configurable GPIOs; up to 32 support external interrupts and 5 V tolerance - simplifies level-shifting in mixed-voltage systems.
PA2/PA3, PA9/PA10, PB6/PB7	USART TX/RX	Three independent USART channels mapped to dedicated pins - enables simultaneous UART-based diagnostics, LIN bus, and ISO7816 smart card interface.
PA4–PA7, PB8–PB9	SPI/I²C	Hardware SPI and I²C peripherals with Fast-mode Plus support (1 Mbit/s) - ensures reliable communication with sensors and PMICs under noisy industrial conditions.
PA1, PA4, PA5, PA6, PA7	ADC inputs	Up to 16 external ADC channels with 12-bit resolution and hardware oversampling - delivers precise voltage/current measurement without external amplifiers.
PA4, PA5	DAC outputs	Two independent 12-bit DACs with sample-and-hold - enables analog waveform generation or precision biasing in sensor excitation circuits.

Key Features

Feature	Design Value
USB Type-C Power Delivery controller	Integrated PD PHY and protocol engine eliminates need for external PD controller IC in portable charging accessories and USB-C host adapters.
Calendar RTC with alarm & wakeup	Real-time clock retains time/date in Stop/Standby/Shutdown modes using VBAT - enables scheduled wakeups for periodic sensor sampling without external RTC.
7-channel DMA with flexible mapping	Reduces CPU load during high-bandwidth transfers (e.g., ADC-to-memory, SPI-to-buffer), improving deterministic timing in real-time control loops.
Programmable Brownout Reset (BOR)	Configurable reset threshold (four levels) prevents erratic operation during brownout events - critical for reliability in unstable power environments like solar-powered nodes.
Temperature sensor & VREFINT	On-die temperature sensor (±2°C accuracy) and internal voltage reference (1.2 V ±1.5 %) enable self-calibration and system health monitoring without external components.

Applications

Smart Energy Metering

Industrial Sensor Node

Use Scenario: Bidirectional energy measurement with tamper detection and secure data logging in DIN-rail mounted meters.

IC Role / Device Role / Timing Role: Main MCU executing metrology algorithms, managing secure flash storage, and driving LCD/LED indicators via GPIO and timers.

Use Value: Integrated 12-bit ADC with hardware oversampling achieves Class 0.5 accuracy; RTC with VBAT backup maintains billing timestamps during mains failure.

Use Scenario: Wireless vibration/temperature monitoring node in predictive maintenance systems with battery life >5 years.

IC Role / Device Role / Timing Role: Low-power sensor aggregator running from Stop mode, waking periodically via LPTIM or RTC alarm to sample analog sensors and transmit via UART/LoRa.

Use Value: Sub-1 µA Standby current with VBAT-RTC and fast wakeup (<5 µs from Stop) extends battery life while maintaining precise scheduling.

USB-C Charging Adapter

Human-Machine Interface (HMI)

Use Scenario: Compact AC/DC adapter negotiating power contracts (5–20 V, up to 100 W) with laptops and tablets via USB-C PD.

IC Role / Device Role / Timing Role: Dedicated USB-C PD controller managing CC logic, VBUS monitoring, and policy engine execution - offloading host MCU.

Use Value: On-chip PD controller eliminates external PD IC, reducing BOM count and PCB area; supports full PD 3.0 specification including PPS.

Use Scenario: Touchless control panel for HVAC or lighting systems using capacitive touch, LED feedback, and local button interface.

IC Role / Device Role / Timing Role: Real-time UI processor handling capacitive sensing (via ADC), PWM dimming (via timers), and serial display updates (via USART/SPI).

Use Value: Dual DACs generate precise reference voltages for touch sensitivity tuning; 60 GPIOs support matrix scanning and multi-color LED drive without expanders.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G071CBT3	LQFP48 package (vs. UFQFPN48); identical core, memory, and peripheral set; same 128 KB Flash/36 KB RAM.	Better thermal dissipation and hand-solderability; less board space efficiency than UFQFPN.	Select when manual rework, higher power dissipation, or legacy footprint compatibility is required.
STM32G081CBU3	Same UFQFPN48 package; adds AES-128 hardware crypto, true random number generator (TRNG), and enhanced ROP security features.	Required for applications needing FIPS-compliant encryption or secure boot (e.g., payment terminals, medical data loggers).	Select when cryptographic acceleration or certified secure boot is mandatory - otherwise, STM32G071CBU3TR offers cost-optimized feature set.

Compared with STM32G071CBT3, the CBU3TR offers superior board-level miniaturization; versus STM32G081CBU3, it trades hardware crypto for lower unit cost and reduced code-signing overhead in non-security-critical industrial controls.

Availability

STM32G071CBU3TR is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and USB-C charging adapters requiring stable component supply across multi-year production cycles.

Supply support for STM32G071CBU3TR 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, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications - delivering Cortex-M0+ performance with enhanced analog integration and USB-C PD capability in compact packages.

FAQ

What is the maximum operating temperature rating for STM32G071CBU3TR?

The STM32G071CBU3TR is qualified for industrial temperature range: –40 °C to +85 °C. This rating is confirmed in DS12232 Rev 5, Section 5.3.1, and applies to all operating modes including Run, Stop, and Standby. The device also supports extended ranges (up to +125 °C) in specific variants, but CBU3TR is specified only to +85 °C.

Does STM32G071CBU3TR support hardware CRC calculation?

Yes, it includes a dedicated CRC calculation unit compliant with IEEE 32-bit CRC standard. This peripheral operates independently of the CPU, enabling high-speed checksum generation for firmware validation, communication packet integrity, or flash memory verification - documented in DS12232 Section 3.6 and RM0454 Reference Manual.

Can the internal 32 kHz RC oscillator be used as the RTC clock source?

Yes, the internal 32 kHz RC oscillator (LSI) is a valid clock source for the RTC, though it has ±5 % accuracy over temperature and voltage. For time-critical applications, ST recommends the 32.768 kHz external crystal (LSE) with calibration - both options are supported simultaneously per Section 3.9 and Table 40 of DS12232.

How many USARTs support LIN physical layer functionality?

Two USARTs (USART1 and USART2) support LIN 2.2 physical layer via built-in LIN break detection and sync byte handling - confirmed in DS12232 Section 3.21 and Table 9. These channels also support ISO7816 and IrDA, enabling multi-standard serial interface consolidation in automotive body electronics.

STM32G071CBU3TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-UFQFN Exposed Pad

Series:: STM32G0

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: -

Core Processor:: ARM® Cortex®-M0+

Core Size:: 32-Bit

Speed:: 64MHz

Connectivity:: HDMI-CEC, I2C, IrDA, LINbus, SPI, UART/USART, USB

Peripherals:: Brown-out Detect/Reset, DMA, I2S, POR, PWM, Temp Sensor, WDT

Number of I/O:: 44

Program Memory Size:: 128KB (128K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 36K x 8

Voltage - Supply (Vcc/Vdd):: 1.7V ~ 3.6V

Data Converters:: A/D 17x12b SAR; D/A 2x12b

Oscillator Type:: External, Internal

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G071CBU3TR FAQ

1.How can I place an order for STM32G071CBU3TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G071CBU3TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM32G071CBU3TR reliable?

The price and inventory of STM32G071CBU3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G071CBU3TR is usually 5 days.

3.What payment methods are accepted for STM32G071CBU3TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G071CBU3TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G071CBU3TR?

STM32G071CBU3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G071CBU3TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM32G071CBU3TR?

For technical support, including STM32G071CBU3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G071CBU3TR requirements.

6.How does Aetrix verify that STM32G071CBU3TR is sourced from the original manufacturer or authorized distributors?

All STM32G071CBU3TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32G071CBU3TR meets industry standards.

7.What is the process for return or replacement of STM32G071CBU3TR?

All STM32G071CBU3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32G071CBU3TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM32G071CBU3TR part is unused and in its original packaging.

Return procedure for STM32G071CBU3TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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