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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~STM32G0B1CBU3TR~~

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STM32G0B1CBU3TR - STMicroelectronics

Name: STMicroelectronics STM32G0B1CBU3TR
Brand: STMicroelectronics
SKU: STM32G0B1CBU3TR
Price: 3.655 USD
Availability: InStock
Rating: 5 (6 reviews)

Manufacturer Part Number: STM32G0B1CBU3TR

Manufacturer: STMicroelectronics

Allelco Part Number: 98D-STM32G0B1CBU3TR

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 39,450 pcs available, New & Original

Parts Description: CONTROLLER / PROCESSOR

Package: 48-UFQFPN (7x7)

Data sheet: -

RoHs Status: ROHS3 Compliant

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Specifications

STM32G0B1CBU3TR Tech Specifications
STMicroelectronics - STM32G0B1CBU3TR technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM32G0B1CBU3TR

Product Attribute	Attribute Value
Manufacturer	STMicroelectronics
Voltage - Supply (Vcc/Vdd)	1.7V ~ 3.6V
Supplier Device Package	48-UFQFPN (7x7)
Speed	64MHz
Series	STM32G0
RAM Size	144K 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	48-UFQFN Exposed Pad

Product Attribute	Attribute Value
Package	Tape & Reel (TR)
Oscillator Type	External, Internal
Operating Temperature	-40°C ~ 125°C (TA)
Number of I/O	44
Mounting Type	Surface Mount
EEPROM Size	-
Data Converters	A/D 17x12b SAR; D/A 2x12b
Core Size	32-Bit
Core Processor	ARM® Cortex®-M0+
Connectivity	CANbus, HDMI-CEC, I²C, IrDA, LINbus, SPI, UART/USART, USB

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected

Frequently Asked Questions(FAQ)

How does the STM32G0B1CBU3TR perform in mixed-signal applications requiring simultaneous analog and digital processing?: The STM32G0B1CBU3TR integrates a 17-channel, 12-bit successive approximation register (SAR) ADC with conversion rates up to 1 MSPS, enabling precise analog-to-digital conversion for sensor inputs or signal conditioning. Coupled with dual 12-bit DACs, it supports dynamic analog output generation within its 1.7V to 3.6V supply range. This allows concurrent operation of digital control loops and real-time analog signal modulation without significant resource contention. For example, in motor control systems, one DAC can generate reference voltages while the ADC samples feedback currents—all managed by the Cortex-M0+ core at up to 64MHz. The internal voltage reference ensures stable ADC measurements across temperature extremes, from -40°C to 125°C.

What are the key differences between the STM32G0B1CBU3TR and the STM32G0B0CBU3TR in terms of memory architecture and peripheral support?: The STM32G0B1CBU3TR offers 128KB of embedded Flash memory and 144KB of RAM, compared to the STM32G0B0CBU3TR’s 32KB Flash and 10KB RAM. This expanded memory footprint enables more complex firmware execution, larger lookup tables, and better multitasking capabilities on the G0B1 variant. Additionally, the G0B1 includes full USB 2.0 FS/HS OTG support with built-in PHY, whereas the G0B0 lacks USB functionality. Both share the same ARM Cortex-M0+ core running at 64MHz, but the G0B1’s increased SRAM allows for efficient handling of data logging or protocol stacks like TCP/IP over USB. The presence of HDMI-CEC and LINbus peripherals further differentiates the G0B1 for automotive or consumer connectivity applications.

Can the STM32G0B1CBU3TR reliably operate in high-temperature industrial environments, and what design precautions should be taken?: Yes, the STM32G0B1CBU3TR is specified for operation from -40°C to +125°C, making it suitable for harsh industrial settings such as power distribution equipment or automotive under-hood modules. However, achieving consistent performance requires attention to PCB layout and power integrity. Decoupling capacitors near VDD pins help stabilize the internal regulators during rapid load transients. Thermal vias under the exposed pad improve heat dissipation, especially when driving external loads via PWM outputs. The device features a programmable brown-out detector (BOD) that resets the MCU if supply drops below safe thresholds—critical in battery-powered systems experiencing voltage sag due to temperature-induced resistance changes.

Is the STM32G0B1CBU3TR suitable for battery-powered IoT edge devices, and how does its power profile compare to higher-performance MCUs?: Yes, the STM32G0B1CBU3TR is optimized for low-power IoT applications. It supports multiple sleep modes, including STOP mode with current draw as low as 1.1 µA, ideal for years-long battery life. Compared to higher-clock-speed MCUs like the STM32H7 series, it trades peak throughput (64MHz vs. 480MHz+) for significantly lower active and standby power. While not ideal for compute-intensive tasks, it efficiently handles sensor polling, BLE packet formatting, and wake-on-interrupt scenarios. Its integrated USB Type-C™ Power Delivery support also enables reverse charging or USB-PD negotiation, adding flexibility in portable designs without requiring external PMICs.

How many GPIO pins on the STM32G0B1CBU3TR can simultaneously support alternate functions like SPI or UART without multiplexing overhead?: All 44 I/O pins on the STM32G0B1CBU3TR can function as general-purpose inputs/outputs, but only certain pins support dedicated alternate functions per pinout configuration. For instance, UART/USART instances typically require two dedicated pins (TX and RX), and each SPI peripheral needs four signals (SCK, MOSI, MISO, NSS). Given the package constraints, simultaneous use of all four SPI channels would exceed available pin count. In practice, designers often dedicate 8–10 pins for communication buses depending on topology. The STM32G0B1’s flexible mapping via AFIO registers allows software reconfiguration, but hardware limitations apply. For maximum peripheral concurrency, careful pin planning using STM32CubeMX is recommended.

What clocking options are available on the STM32G0B1CBU3TR, and how do they affect system timing accuracy?: The STM32G0B1CBU3TR provides multiple clock sources: an internal 16 MHz RC oscillator (±1% accuracy over temperature), a calibrated 32 kHz low-power oscillator, and support for external crystals up to 32 MHz or ceramic resonators. Users can derive the main 64 MHz system clock via PLL multiplication from any of these sources. External crystals offer superior long-term stability (±20 ppm typical) versus internal RC (~±1%), crucial for applications requiring precise timing—such as CAN bus synchronization or USB enumeration. When high accuracy isn’t critical, the internal HSI16 reduces component count and power. The device also includes a LSE crystal input for RTC operation, enabling accurate timekeeping even during deep sleep modes.

Does the STM32G0B1CBU3TR include hardware-based security features, and how do they impact secure boot implementation?: The STM32G0B1CBU3TR incorporates ST’s proprietary hardware security engine, including a unique read-only device identifier and optional write-protected Flash regions. However, it lacks advanced cryptographic accelerators found in higher-end STM32 families (e.g., AES-256 or TRNG). Secure boot can still be implemented using external flash or internal Flash with user-defined keys stored in option bytes, validated during startup via CRC checks. Since no tamper detection circuitry is present, physical access protection relies on mechanical shielding or enclosure design. This makes it appropriate for non-high-assurance applications where software-level obfuscation and secure key storage suffice, rather than military or financial-grade security.

How does the STM32G0B1CBU3TR handle DMA transfers involving both Flash memory and peripherals like the ADC or SPI?: The STM32G0B1CBU3TR supports DMA requests from 11 peripherals, including ADC conversions, SPI, UART, and timers. However, direct DMA transfers to/from Flash memory are not natively supported because Flash writes must occur in word-aligned blocks and take variable time. Instead, ADC data is typically streamed into RAM buffers via DMA, then processed by the CPU or copied to Flash in bursts after conversion completes. Similarly, received SPI/UART data resides in FIFO buffers before being moved to RAM. Efficient workflows use double-buffering techniques: while one buffer fills via DMA, the other is processed. This minimizes CPU intervention and maintains real-time responsiveness, leveraging the 144 KB RAM effectively.

What considerations apply when using the STM32G0B1CBU3TR’s USB interface in self-powered versus bus-powered configurations?: In bus-powered mode, the STM32G0B1CBU3TR draws up to 100 mA from the host VBUS line, which must remain stable during enumeration and operation. Designers must ensure adequate bulk capacitance near the USB transceiver and comply with USB-IF compliance testing if targeting certification. For self-powered designs, VBUS can be disconnected or ignored, and power comes from an independent source. The internal pull-up resistor on DP enables device detection by the host. Note that USB OTG capability requires external ID pin management unless using USB-C connectors with CC logic. In either case, proper impedance matching on D+/D- traces (<10% mismatch) and adherence to length-matching rules prevent signal integrity issues during high-speed communication.

Can the STM32G0B1CBU3TR drive inductive loads directly through its GPIO pins, and what protections are necessary?: No, GPIO pins on the STM32G0B1CBU3TR cannot safely drive inductive loads like relays or solenoids directly due to current limitations (~20 mA per pin, 80 mA total for the entire chip). Inductive kickback can damage the MCU or cause latch-up. Instead, use external MOSFETs or transistors driven by GPIOs, with flyback diodes across the coil. For higher reliability, optocouplers isolate control signals from load side. The device’s built-in brown-out reset protects against undervoltage conditions that might arise during sudden load switching, but additional external clamping circuits may be needed for transient suppression per IEC 61000-4 standards. Always verify thermal margins under worst-case duty cycles.

How does the STM32G0B1CBU3TR compare to the ESP32-S3 in terms of connectivity and real-time performance for embedded vision applications?: The STM32G0B1CBU3TR uses an ARM Cortex-M0+ core at 64 MHz, offering deterministic interrupt latency and cycle-accurate timing—essential for real-time motor control or sensor fusion. In contrast, the ESP32-S3 runs Xtensa LX7 cores up to 240 MHz but prioritizes Wi-Fi/BLE connectivity over hard real-time guarantees. While the ESP32-S3 has dual-core processing and PSRAM support beneficial for image buffering, the STM32G0B1 lacks native camera interfaces or DSP extensions. For simple vision tasks (e.g., thresholding or barcode scanning), the STM32G0B1 suffices with external sensors; for ML inference, the ESP32-S3’s NPU outperforms. Thus, choice depends on whether real-time determinism or wireless intelligence dominates the application profile.

What role does the Watchdog Timer (WDT) play in robust firmware design using the STM32G0B1CBU3TR?: The STM32G0B1CBU3TR includes an Independent Watchdog (IWDG) with a user-programmable timeout up to 26.2 seconds, running from a dedicated 32 kHz RC oscillator. Unlike the Window Watchdog, the IWDG operates even in STOP mode and cannot be disabled once enabled, ensuring recovery from software hangs. During normal operation, the application must periodically "pet" the watchdog by writing to its register. Failure to do so triggers a system reset. This mechanism complements other resilience strategies like stack overflow checks or task monitoring in RTOS environments. Careful consideration of ISR duration and main loop execution time is required to avoid unintended resets during legitimate delays.

How should decoupling capacitors be placed around the STM32G0B1CBU3TR to ensure reliable operation under fast switching loads?: Each VDD/VSSA pair on the STM32G0B1CBU3TR requires a 100 nF ceramic capacitor placed as close as possible (within 3 mm) to the pin, with minimal trace inductance. Additional bulk capacitance (e.g., 10 µF tantalum) near the power entry point helps stabilize supply rails during transient events like USB suspend/resume or PWM burst modes. Ground plane continuity beneath the 48-UFQFPN (7x7) package reduces ground bounce. Avoid splitting ground planes under high-current paths. Simulation tools like SPICE can model power integrity, but empirical validation via scope measurements during stress testing remains essential, especially when driving multiple peripherals concurrently.

Is it feasible to upgrade legacy STM32F0 designs to the STM32G0B1CBU3TR while maintaining code compatibility?: Partial compatibility exists due to shared instruction set architecture (Thumb-2) and similar register maps, but significant differences prevent direct binary reuse. The STM32G0B1 adds peripherals like HDMI-CEC and USB-PD support absent in F0 series, while removing some legacy timers. Clock tree initialization diverges, and power modes differ. However, STM32CubeMX and HAL libraries provide abstraction layers easing migration. Most peripheral drivers require rewriting or adapting. If the original design used basic GPIO, UART, and timer functions, porting effort is manageable. But leveraging G0B1-specific features like advanced comparators or low-power modes necessitates architectural redesign.

What are the implications of using the STM32G0B1CBU3TR in automotive-grade temperature ranges beyond standard industrial specs?: While the STM32G0B1CBU3TR meets AEC-Q100 Grade 2 qualification (-40°C to +105°C), operation up to 125°C is only guaranteed for industrial grades. Automotive systems often require extended temperature ranges (+125°C continuous), which may demand stricter screening, derating of voltage margins, and conformal coating to prevent moisture ingress. Additionally, automotive protocols like CAN FD or LIN require precise bit timing, achievable with the G0B1’s flexible baud rate generators. However, functional safety certification (ISO 26262) would necessitate ASIL-rated development processes and fault injection testing—beyond typical MCU usage. Thus, suitability hinges on environmental severity and regulatory classification.

How does the STM32G0B1CBU3TR’s Flash memory endurance compare to EEPROM-based solutions for frequent data logging?: The STM32G0B1CBU3TR’s Flash memory offers typical endurance of 10,000 write cycles per sector, sufficient for moderate data logging (e.g., every hour over 3 years). However, frequent updates (>1 Hz) will degrade Flash rapidly. For higher-frequency logging, consider using the device’s 144 KB RAM as a circular buffer, writing only periodic snapshots to Flash. Alternatively, implement wear leveling across multiple sectors. True EEPROM emulation requires software overhead and careful management. Compared to external EEPROM chips (often 1 million+ cycles), the STM32G0B1’s integrated solution saves board space and simplifies I²C routing, but endurance remains a constraint for ultra-frequent writes.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics STM32G0B1CBU3TR

Product Attribute
Part Number	STM32G0B1CBU6TR	STM32G0B1CBU7TR	STM32G0B1CBU3	STM32G0B1CBU6
Manufacturer	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Core Size	-	-	-	-
RAM Size	-	-	-	-
Peripherals	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Connectivity	-	-	-	-
Number of I/O	-	-	-	-
Data Converters	-	-	-	-
EEPROM Size	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Oscillator Type	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Core Processor	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Series	-	-	-	-
Program Memory Type	-	-	-	-
Voltage - Supply (Vcc/Vdd)	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Program Memory Size	-	-	-	-
Speed	-	-	-	-

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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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America	Brazil	7
Europe	Germany	5
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Oceania	Australia	6
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Asia	India	4
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Middle East	Israel	6

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