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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersSTM32G081RBI6
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STM32G081RBI6 - STMicroelectronics

Manufacturer Part Number
STM32G081RBI6
Manufacturer
STMicroelectronics
Allelco Part Number
98D-STM32G081RBI6
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
41,288 pcs available, New & Original
Parts Description
IC MCU 32BIT 128KB FLASH 64UFBGA
Package
64-UFBGA (5x5)
Data sheet
STM32G081RBI6.pdf

PCN Assembly/Origin

Mult Dev A/T Chgs 13/Dec/2021.pdf
RoHs Status
ROHS3 Compliant
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In stock: 41288
  • Unit Price: $3.152
  • Subtotal: $0.00

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Specifications

STM32G081RBI6 Tech Specifications
STMicroelectronics - STM32G081RBI6 technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM32G081RBI6

Product Attribute Attribute Value
Manufacturer STMicroelectronics
Voltage - Supply (Vcc/Vdd) 1.7V ~ 3.6V
Supplier Device Package 64-UFBGA (5x5)
Speed 64MHz
Series STM32G0
RAM Size 36K x 8
Program Memory Type FLASH
Program Memory Size 128KB (128K x 8)
Peripherals Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Package / Case 64-UFBGA
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 60
Mounting Type Surface Mount
EEPROM Size -
Data Converters A/D 19x12b; D/A 2x12b
Core Size 32-Bit Single-Core
Core Processor ARM® Cortex®-M0+
Connectivity HDMI-CEC, I²C, IrDA, LINbus, SPI, UART/USART, USB
Base Product Number STM32G081

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN 5A992C
HTSUS 8542.31.0001

Frequently Asked Questions(FAQ)

What are the key differences between the STM32G081RBI6 and the STM32G071 series in terms of memory architecture and power efficiency for battery-powered embedded applications?
The STM32G081RBI6 offers 128KB of Flash memory and 36KB of RAM, providing a larger code storage capacity compared to the STM32G071, which typically comes with 64KB or 128KB options depending on the variant. This expanded memory allows more complex firmware implementations without external memory components. Both devices operate within a 1.7V to 3.6V supply range, but the STM32G081RBI6 includes enhanced low-power modes such as Stop and Standby with reduced current draw in deep sleep, making it suitable for extended battery life. The Cortex-M0+ core at 64MHz delivers consistent performance across both series, but the additional RAM in the G081 enables more efficient data handling in multitasking environments.
Can the STM32G081RBI6 be used in USB Type-C Power Delivery applications, and what design considerations are necessary to ensure reliable operation?
Yes, the STM32G081RBI6 supports USB Type-C (Power Delivery) through its USB interface, enabling bidirectional power negotiation and communication up to 100W. However, implementing USB PD requires careful attention to hardware design, including proper termination resistors, pull-up/pull-down configurations on CC lines, and compliance with USB-IF specifications. Additionally, firmware must handle enumeration, voltage negotiation, and data transfer protocols. The device’s 36KB RAM provides sufficient space for managing PD state machines, but developers should validate timing constraints during high-speed signaling due to the 64MHz clock limitation.
How does the STM32G081RBI6 compare to the STM32F072CBT6 in terms of peripheral integration and real-time control capabilities?
While the STM32F072CBT6 is based on the same Cortex-M0+ core, the STM32G081RBI6 offers improved peripheral integration with support for HDMI-CEC, LINbus, and enhanced I2S functionality not available in the F0 series. The G081 also features 19x12-bit ADCs and 2x12-bit DACs, providing higher resolution analog signal processing. In contrast, the F072 typically has fewer ADC channels and lacks advanced connectivity like USB Type-C. For real-time control, both devices support PWM and DMA, but the G081’s larger program memory (128KB vs. 128KB on F072) allows for more sophisticated motor control algorithms or sensor fusion routines without code fragmentation.
What are the thermal and electrical limitations of the STM32G081RBI6 when operating at full speed under continuous load?
At 64MHz continuous operation, the STM32G081RBI6 typically consumes around 12–15 mA from a 3.3V supply, generating heat proportional to switching losses in the core and peripherals. The package (64-UFBGA, 5x5) has limited thermal conductivity compared to larger QFN packages, so adequate PCB copper area and thermal vias are essential to keep junction temperatures below 85°C. Exceeding the maximum ambient temperature of 85°C may trigger internal thermal protection mechanisms, potentially causing throttling or reset. Designers should simulate power dissipation using ST’s Power Control Library tools and consider dynamic frequency scaling during idle periods to reduce thermal stress.
Is the STM32G081RBI6 suitable for automotive applications requiring AEC-Q100 certification, and what modifications might be needed?
No, the STM32G081RBI6 is not AEC-Q100 qualified; it is intended for industrial-grade applications. While it operates over -40°C to 85°C, automotive systems often require qualification up to 125°C and rigorous reliability testing. To adapt this part for automotive use, engineers would need to implement external monitoring circuits for brown-out detection, use shielded cables for high-speed signals like USB and HDMI-CEC, and apply conformal coating to prevent moisture ingress. Additionally, redundant firmware checks and error-correcting memory techniques may be required to meet functional safety standards such as ISO 26262.
How does the internal oscillator accuracy of the STM32G081RBI6 impact USB communication stability, and what alternatives exist?
The internal 64 MHz RC oscillator in the STM32G081RBI6 has a typical accuracy of ±1% at 25°C, which can degrade to ±3% over temperature and voltage variations. This level of jitter may cause USB enumeration failures or data corruption due to timing misalignment with host clocks. For reliable USB operation, an external crystal oscillator providing ±20 ppm stability is strongly recommended. Alternatively, the device supports calibration via ST’s factory-programmed trimming values, but these still fall short of USB specification requirements. Using an external HSE (High-Speed External) oscillator ensures compliance with USB timing tolerances and improves system robustness.
What are the implications of using the STM32G081RBI6 in a multi-board system where signal integrity over long traces is a concern?
The STM32G081RBI6 supports high-speed interfaces like SPI, I2C, and USB, which are sensitive to trace length and impedance matching. On multi-board systems with backplane connections exceeding 10 cm, reflections and crosstalk can disrupt communication. For SPI and I2C, adding series termination resistors near the MCU and limiting trace lengths helps maintain signal quality. USB differential pairs should be routed as controlled-impedance lines (90 Ω diff) with stub minimization. The 64-UFBGA package’s fine pitch (0.4 mm ball spacing) also increases routing complexity, necessitating careful layer stack design to avoid coupling noise into analog inputs or clock lines.
How does the STM32G081RBI6 support secure boot and what cryptographic capabilities are built into the hardware?
The STM32G081RBI6 includes a TrustZone-like security feature through its option bytes configuration that enables read-out protection (RDP) levels and write protection zones in Flash memory. While it does not have a dedicated cryptographic accelerator like AES or TRNG, it can perform basic SHA-256 hashing in software using ST’s HAL libraries. Secure boot can be implemented by storing a hash of the application in a protected area and verifying it during startup. However, for advanced encryption or digital signatures, an external secure element or co-processor is recommended, as the Cortex-M0+ lacks native cryptographic acceleration.
What are the best practices for programming the STM32G081RBI6 in production environments using SWD, and how do debug access restrictions affect manufacturing?
During production programming, SWD (Serial Wire Debug) should be used with a 4-wire connection (SWCLK, SWDIO, NRST, GND), ensuring proper pull-up resistors on SWD lines to prevent floating states. To prevent unauthorized firmware extraction, the user option byte should set RDP Level 1, which disables mass erase and debug access after the first successful unlock. However, this also prevents reflashing unless a full chip erase is performed. For scalable production, ST-Link Utility or OpenOCD scripts with unique ID-based addressing help manage device differentiation. Always verify flash integrity post-write using checksum verification to catch programming errors early.
How does the pin count and layout of the STM32G081RBI6 influence PCB design decisions, especially for compact IoT devices?
With 60 I/O pins distributed across a 5x5 UFBGA package, the STM32G081RBI6 demands a minimum of six-layer PCBs for optimal routing, including dedicated power, ground, and signal layers. BGA reworkability is challenging due to small ball size (0.35 mm diameter), so stencil printing and solder paste inspection are critical. Power delivery must be carefully managed: decoupling capacitors should be placed within 1–2 mm of each VDD/VSS pair. Signal integrity becomes paramount for high-speed interfaces; thus, controlled impedance routing and length matching are necessary. For compact IoT designs, thermal relief and component height constraints further complicate layout, often requiring trade-offs between density and manufacturability.
What is the expected lifespan and failure rate of the STM32G081RBI6 under typical industrial operating conditions?
Based on STMicroelectronics' reliability data for similar 32G0 series parts, the STM32G081RBI6 exhibits a mean time between failures (MTBF) exceeding 1 million hours under nominal conditions (-40°C to 85°C, 1.7–3.6V). Failure mechanisms are primarily related to electromigration in bond wires and dielectric breakdown in packaging materials. Accelerated life testing shows less than 0.5% failure rate after 1,000 hours at 85°C and max VDD. Proper derating—keeping junction temperatures below 70°C and avoiding voltage overshoot—extends operational life significantly. End-of-life planning should include alternate sourcing due to potential supply chain shifts, though RoHS3 compliance ensures environmental sustainability.
Can the STM32G081RBI6 drive inductive loads directly, and what protective measures are required?
No, the STM32G081RBI6 cannot safely drive high-inductive loads (e.g., relays, solenoids) directly due to limited output current (~20 mA per GPIO) and lack of built-in flyback protection. Inductive kickback can damage I/O pins or corrupt adjacent circuits. Instead, use external drivers like MOSFETs or optocouplers with snubber diodes across the load. For PWM-controlled inductive loads, ensure dead-time insertion in firmware to prevent shoot-through in half-bridge configurations. Monitoring current feedback through shunt resistors enables closed-loop control, improving efficiency and protecting the MCU.
How does the STM32G081RBI6 handle wake-up latency from low-power modes, and what factors influence transition speed?
The STM32G081RBI6 offers multiple low-power modes: Sleep (wakes in ~1 µs), Stop (wakes in ~10 µs), and Standby (~100 µs). Wake-up sources include EXTI lines, RTC alarms, and USB resume events. Latency depends on clock source restoration: internal HSI takes ~1 µs to stabilize, while external HSE may take longer if not pre-warmed. Context restoration from RAM retains execution state instantly in Sleep mode, but registers are lost in deeper modes, requiring initialization routines. Minimizing wake-up overhead involves disabling unused peripherals before entering low-power states and using fast interrupt handlers.
What are the risks of using the STM32G081RBI6 without proper ESD protection in field-deployed systems?
Without external ESD protection, the STM32G081RBI6 is vulnerable to electrostatic discharge events common in industrial or consumer environments. The UFBGA package has moderate ESD immunity (typically ±2 kV HBM), but repeated exposure can degrade bond wires or gate oxides over time. Field failures often manifest as erratic behavior, reset loops, or permanent I/O damage. Adding transient voltage suppressors (TVS diodes) on all exposed pins—especially USB D+/D-, HDMI-CEC, and LIN—provides robust protection. Layout should minimize loop areas and avoid sharp corners in traces to reduce susceptibility to radiated interference.
How does the STM32G081RBI6 support over-the-air (OTA) firmware updates, and what security precautions are essential?
OTA updates are feasible using the built-in USB or UART/USART interface to receive new firmware images. The 128KB Flash must be partitioned into application and bootloader sections, with the latter verifying image integrity via CRC or digital signatures. Since the MCU lacks hardware crypto engines, signature validation runs in software, increasing boot time and RAM usage. To prevent rollback attacks, a version counter stored in protected Flash tracks update history. Network security protocols like DTLS or custom lightweight TLS should encrypt payloads. Bootloader recovery mechanisms are crucial in case of corrupted updates, often implemented via a secondary serial port or USB DFU mode.
What are the advantages of using the STM32G081RBI6 over discrete microcontrollers in integrated motor control systems?
The STM32G081RBI6 integrates peripherals like PWM timers, ADCs, and DACs essential for motor control, eliminating the need for external ICs such as comparators or gate drivers. Its 19x12-bit ADC enables precise current sensing with minimal quantization error (<0.1% FS), improving torque regulation. The presence of DMA reduces CPU load during ADC sampling, freeing resources for control algorithms. Compared to discrete MCUs requiring additional circuitry, this integration lowers BOM cost, board space, and power consumption. However, complex vector control algorithms may exceed 128KB Flash, necessitating code optimization or external memory expansion.
How does the STM32G081RBI6 comply with electromagnetic compatibility (EMC) standards in noisy industrial environments?
Compliance with EMC standards (e.g., EN 61000-4-x) requires careful PCB layout and filtering. The STM32G081RBI6 itself meets Class B emissions limits when properly decoupled and grounded. Critical strategies include placing bulk capacitors near VDD pins, using ferrite beads on clock outputs, and shielding high-speed signals. Slow-edge-rate signals reduce conducted emissions, so slew-rate limiting on GPIOs helps. For radiated immunity, keep analog traces away from digital highways and use ground planes to contain fields. Testing should include burst immunity on power lines and EFT protection on communication ports, which may require external clamping diodes or filters.
What tools and development kits are recommended for rapid prototyping with the STM32G081RBI6?
STMicroelectronics provides the NUCLEO-G081RB development board, which includes Arduino headers, ST-Link debugger, and access to all 60 GPIOs. It supports STM32CubeIDE with HAL/LL libraries and offers example projects for USB, PWM, and ADC. Third-party kits like the B-G074A-EVAL evaluation board expand capabilities with sensors and displays. For debugging, logic analyzers (e.g., Saleae) capture SPI/I2C traffic, while oscilloscopes monitor USB eye diagrams. ST’s X-Cube tools automate peripheral configuration and generate initialization code, accelerating firmware development. Always validate timing margins early using simulation tools like Proteus or LTspice before committing to hardware.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics STM32G081RBI6

Product Attribute STM32G081RBT6TR STM32G081KBT6 STM32G081CBT6 STM32G081GBU6
Part Number STM32G081RBT6TR STM32G081KBT6 STM32G081CBT6 STM32G081GBU6
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Number of I/O - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Program Memory Size - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Supply (Vcc/Vdd) - - - -
Core Size - - - -
EEPROM Size - - - -
RAM Size - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Core Processor - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Connectivity - - - -
Speed - - - -
Program Memory Type - - - -
Series - - - -
Oscillator Type - - - -
Peripherals - - - -
Data Converters - - - -

STM32G081RBI6 Datasheet PDF

Download STM32G081RBI6 pdf datasheets and STMicroelectronics documentation for STM32G081RBI6 - STMicroelectronics.

Datasheets
STM32G081x6.pdf STM32G081xB.pdf STM32G0x1 Ref. Manual.pdf
PCN Packaging
Material Barrier Bag 17/Dec/2020.pdf
PCN Design/Specification
Datasheets enhancement 01/Sep/2021.pdf Mult Dev Des Improv 24/Nov/2022.pdf
PCN Assembly/Origin
Mult Dev A/T Chgs 13/Dec/2021.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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STMicroelectronics

STM32G081RBI6

STMicroelectronics
98D-STM32G081RBI6

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