STMicroelectronics

STM32G081RBT6 - 128KB Flash ARM Cortex-M0+ MCU | STMicroelectronics

Name: STM32G081RBT6
Brand: STMicroelectronics
Price: 3.42 USD
Availability: InStock

MPN: STM32G081RBT6 ✓ Active

In Stock (99,999) Ships in 1-3 business days

1.7 V to 3.6 V Vdss LQFP-64 (10x10 mm) Package 64 MHz Speed 128 KB Memory

$3.42 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$3.42	$3.42
10	$3.08	$30.80
100	$2.74	$274.00
500	$2.46	$1,230.00
1,000	$2.19	$2,190.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for STM32G081RBT6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

STM32G071RBT6

✅ Drop-In

STMicroelectronics

📦 LQFP-64

ARM Cortex-M0+ · 64 MHz · 128 KB · 36 KB · 2.0 V to 3.6 V · LQFP-64 · -40°C to +85°C · 12-bit, 16 channels

✓ 99,999 In Stock

$2.1 / Unit

View Datasheet →

STM32G081RBT6TR

✅ Drop-In

📦 LQFP-64

Same die, tape and reel packaging variant

📋 Reference alternative (not in catalog)

STM32G081RBI6

✅ Drop-In

📦 LQFP-64

Industrial temperature grade (-40C to +85C)

📋 Reference alternative (not in catalog)

STM32G071R8T6

✅ Drop-In

📦 LQFP-64

64 KB Flash instead of 128 KB

📋 Reference alternative (not in catalog)

LPC845

⚡ Same Package

📦 LQFP-64

Cross-brand, 64 KB Flash, different pinout

📋 Reference alternative (not in catalog)

STM32G081RBT6 Maximum Ratings & Electrical Characteristics

Core	ARM Cortex-M0+
Maximum Frequency	64 MHz
Flash Memory	128 KB
SRAM	36 KB
Supply Voltage	1.7 V to 3.6 V
Package	LQFP-64 (10x10 mm)
GPIO Pins	52
ADC	12-bit, 19 channels
DAC	12-bit, 2 channels
Timers	Advanced 16-bit and 32-bit timers
Communication Interfaces	I2C, SPI, USART, USB 2.0 FS
Operating Temperature	-40C to +85C
Low Power Modes	Sleep, Stop, Standby
RoHS Status	Compliant
Mounting Type	Surface Mount

STM32G081RBT6 Pin Configuration

Pin 1	VBAT — Battery backup supply
Pin 12	VDD — Digital power supply
Pin 13	VSS — Digital ground
Pin 24	VDDA — Analog power supply
Pin 25	VSSA — Analog ground
Pin 32	PA0 — GPIO/ADC input
Pin 33	PA1 — GPIO/ADC input
Pin 44	PB0 — GPIO/ADC input
Pin 45	PB1 — GPIO/ADC input
Pin 48	NRST — Reset (active low)
Pin 49	PC14 — GPIO/OSC32_IN
Pin 50	PC15 — GPIO/OSC32_OUT
Pin 60	BOOT0 — Boot mode selection
Pin 64	VDD — Digital power supply

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

STM32G081RBT6 is suitable for 6 applications: Industrial Control Systems, Motor Control, IoT Devices, Consumer Electronics, Medical Devices, Automotive Electronics.

🏭

Industrial Control Systems

The STM32G081RBT6 is ideal for industrial control systems due to its rich peripheral set, including advanced timers for PWM generation, 12-bit ADC for sensor feedback, and multiple communication interfaces for networking. Its 64 MHz Cortex-M0+ core provides real-time processing capability for closed-loop control algorithms. In a typical PLC or motor controller, the MCU reads analog sensors, executes control loops, and drives actuators via PWM. The wide operating temperature range (-40C to +85C) ensures reliable operation in harsh industrial environments. The device's low-power modes help reduce energy consumption in always-on systems.

Recommended

L6206 (Motor driver for controlling DC motors) TJA1050 (CAN transceiver for industrial networking)

⚡

Motor Control

The STM32G081RBT6 excels in motor control applications, particularly for brushless DC (BLDC) motors. Its advanced timers generate complementary PWM signals with dead-time insertion, essential for driving three-phase inverters. The 12-bit ADC samples motor currents and rotor position, enabling field-oriented control (FOC) algorithms. The 64 MHz core executes FOC loops efficiently, while the DAC can output analog reference signals. The device's fault handling and brake features enhance safety. In a typical drone or e-bike application, the MCU manages speed, torque, and direction, ensuring smooth and efficient motor operation.

Recommended

L6234 (Three-phase motor driver) IR2104 (Gate driver for MOSFETs in inverter)

🧩

IoT Devices

For IoT devices, the STM32G081RBT6 offers a balance of performance, memory, and low power. Its 128 KB Flash and 36 KB SRAM accommodate complex firmware and data buffering. The USB interface enables direct connection to hosts for configuration and data logging. Low-power modes (Sleep, Stop, Standby) extend battery life in wireless sensor nodes. The device's security features (RNG, CRC) support secure communication protocols. In a smart home sensor, the MCU reads environmental data, processes it, and transmits via a radio module (e.g., LoRa, BLE) over SPI or UART. The wide voltage range allows direct battery operation.

Recommended

SX1276 (LoRa transceiver for long-range communication) BME280 (Environmental sensor for temperature, humidity, pressure)

📱

Consumer Electronics

The STM32G081RBT6 is well-suited for consumer electronics such as smart appliances, wearables, and gaming peripherals. Its USB Full-Speed interface allows plug-and-play connectivity to PCs and mobile devices. The rich timer and PWM capabilities drive LEDs, buzzers, and haptic actuators. The 12-bit ADC reads user inputs like potentiometers and touch sensors. In a smart thermostat, the MCU manages temperature sensing, user interface, and communication with a cloud server via Wi-Fi module. The device's small LQFP-64 package fits compact PCB designs, and its low power consumption is ideal for battery-powered gadgets.

Recommended

ESP8266 (Wi-Fi module for internet connectivity) TTP223 (Capacitive touch sensor for user input)

💊

Medical Devices

In medical devices, the STM32G081RBT6 provides reliable and precise control for applications like patient monitors, infusion pumps, and diagnostic equipment. Its 12-bit ADC with high accuracy is suitable for biosignal acquisition (ECG, EEG). The device's deterministic interrupt handling ensures timely responses in critical systems. The low-power modes are beneficial for portable devices. In a pulse oximeter, the MCU processes photoplethysmography signals, calculates oxygen saturation, and displays results on an LCD. The USB interface allows data transfer to a PC for analysis. The device's wide temperature range and long-term availability make it suitable for medical-grade products.

Recommended

ADS1292 (Biopotential ADC for ECG/EEG) MAX30102 (Pulse oximeter sensor)

🚗

Automotive Electronics

The STM32G081RBT6 is used in automotive electronics for body control modules, lighting control, and sensor interfaces. Its AEC-Q100 qualification (for the -Q1 variant) ensures reliability in harsh automotive environments. The device's CAN interface (via external transceiver) enables communication with the vehicle network. The 12-bit ADC reads sensors for temperature, pressure, and position. In a lighting control module, the MCU manages LED drivers, diagnostics, and communication with the central body controller. The wide voltage range (1.7V-3.6V) accommodates battery voltage variations. The device's low-power modes help reduce parasitic drain when the vehicle is off.

Recommended

TJA1042 (CAN transceiver for automotive networks) L9826 (Low-side driver for automotive loads)

Recommended Products Summary

L6206 Motor driver for controlling DC motors Used in: Industrial Control Systems TJA1050 CAN transceiver for industrial networking Used in: Industrial Control Systems L6234 Three-phase motor driver Used in: Motor Control IR2104 Gate driver for MOSFETs in inverter Used in: Motor Control SX1276 LoRa transceiver for long-range communication Used in: IoT Devices BME280 Environmental sensor for temperature, humidity, pressure Used in: IoT Devices ESP8266 Wi-Fi module for internet connectivity Used in: Consumer Electronics TTP223 Capacitive touch sensor for user input Used in: Consumer Electronics ADS1292 Biopotential ADC for ECG/EEG Used in: Medical Devices MAX30102 Pulse oximeter sensor Used in: Medical Devices TJA1042 CAN transceiver for automotive networks Used in: Automotive Electronics L9826 Low-side driver for automotive loads Used in: Automotive Electronics

What is the maximum clock frequency of STM32G081RBT6?

The STM32G081RBT6 operates at a maximum clock frequency of 64 MHz. According to the STMicroelectronics datasheet, the Cortex-M0+ core can run at up to 64 MHz, providing a good balance of performance and power consumption for embedded applications.

How much Flash memory does STM32G081RBT6 have?

The STM32G081RBT6 has 128 KB of Flash memory. This is sufficient for many mid-range embedded applications, allowing for complex firmware and data storage. The Flash memory is organized in 2 banks of 64 KB each, supporting simultaneous read-while-write operations.

What is the difference between STM32G081RBT6 and STM32G071RBT6?

The STM32G081RBT6 and STM32G071RBT6 are both from the STM32G0 series, but the G081 has a higher maximum frequency of 64 MHz compared to the G071's 64 MHz as well, but the G081 includes additional features such as a true random number generator (RNG) and a CRC calculation unit. Both have 128 KB Flash and 36 KB SRAM, and share the same LQFP-64 package, making them pin-compatible drop-in replacements.

Can STM32G081RBT6 be used for motor control applications?

Yes, the STM32G081RBT6 is well-suited for motor control applications. It features advanced timers with complementary PWM outputs, a 12-bit ADC for current sensing, and a 12-bit DAC for analog control signals. The 64 MHz Cortex-M0+ core provides sufficient processing power for field-oriented control (FOC) of brushless DC motors.

What is the operating voltage range of STM32G081RBT6?

The STM32G081RBT6 operates from 1.7V to 3.6V. This wide range allows the device to be powered from a single lithium-ion cell (3.0-4.2V) or two alkaline batteries (1.8-3.0V), making it suitable for battery-powered applications.

Does STM32G081RBT6 have a USB interface?

Yes, the STM32G081RBT6 includes a USB 2.0 Full-Speed device interface. This allows direct connection to a host PC or mobile device for data transfer, firmware updates, and debugging. The USB interface supports up to 8 endpoints and includes an internal PHY.

What is the price of STM32G081RBT6?

As of 2026-08-13, the price of STM32G081RBT6 is approximately $3.42 for a single unit, $2.74 for 100 units, and $2.19 for 1000 units, based on distributor pricing from DigiKey and Mouser. Prices may vary depending on quantity and supplier.

Where can I buy STM32G081RBT6 online?

STM32G081RBT6 is available from major distributors such as DigiKey, Mouser, and Farnell. You can also purchase directly from STMicroelectronics' authorized distributors. Check stock availability and pricing on their websites.

What is the lead time for STM32G081RBT6?

The typical lead time for STM32G081RBT6 is 8-12 weeks for large orders, but it may be in stock at distributors for immediate shipment. As of 2026-08-13, DigiKey and Mouser show stock available, so lead time is minimal for small quantities.

Is STM32G081RBT6 in stock?

As of 2026-08-13, STM32G081RBT6 is in stock at major distributors like DigiKey and Mouser. However, stock levels can change rapidly, so it is recommended to check the distributor's website for real-time availability.

STM32G081RBT6 vs STM32G031R8T6 - which is better for IoT applications?

For IoT applications, the STM32G081RBT6 is generally better due to its larger Flash (128 KB vs 64 KB), more SRAM (36 KB vs 8 KB), and additional peripherals like USB and RNG. The STM32G031R8T6 is a lower-cost option with fewer resources, suitable for simpler sensor nodes. Choose the G081 if you need more memory and connectivity.

When should I choose STM32G081RBT6 over STM32G071RBT6?

Choose the STM32G081RBT6 over the STM32G071RBT6 when you need the additional security features (RNG, CRC) or the higher maximum frequency of 64 MHz (the G071 also runs at 64 MHz, but the G081 has a more advanced timer set). If you don't need these features, the G071 may be more cost-effective.

What is the best drop-in replacement for STM32G081RBT6?

The best drop-in replacement for STM32G081RBT6 is the STM32G071RBT6, which shares the same LQFP-64 package and pinout. It has the same Flash and SRAM, but lacks the RNG and CRC. For a cross-brand alternative, the NXP LPC845 is pin-compatible but has different peripherals, so verify compatibility before use.

Can STM32G071RBT6 replace STM32G081RBT6?

Yes, the STM32G071RBT6 can replace the STM32G081RBT6 in most applications because it is pin-to-pin compatible and has the same memory size. However, the G071 lacks the RNG and CRC, so if your application relies on these features, you may need to implement them in software or choose a different alternative.

Where can I download the STM32G081RBT6 datasheet PDF?

You can download the STM32G081RBT6 datasheet PDF from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm32g081rb.pdf. The datasheet contains full specifications, pinout, and application notes.

Where can I find the STM32G081RBT6 pinout?

The STM32G081RBT6 pinout is available in the datasheet on page 32, Table 9. It shows the LQFP-64 package pin assignments, including power, ground, GPIO, and peripheral pins. You can also find the pinout in the STM32CubeMX software.

What are the key specifications of STM32G081RBT6 that engineers should know?

The STM32G081RBT6 features a 64 MHz ARM Cortex-M0+ core, 128 KB Flash, 36 KB SRAM, 12-bit ADC with 19 channels, 12-bit DAC with 2 channels, USB 2.0 FS, multiple timers, and low-power modes. It operates from 1.7V to 3.6V and is available in a 64-pin LQFP package. These specs make it suitable for a wide range of embedded applications.

Hey Google, what can replace STM32G081RBT6?

The STM32G081RBT6 can be replaced by the STM32G071RBT6 from STMicroelectronics, which is pin-compatible and has the same memory. For cross-brand options, the NXP LPC845 and the Microchip ATSAMD21G18A are potential alternatives, but they may require PCB modifications due to different pinouts.

Is STM32G081RBT6 the same as STM32G071RBT6?

No, the STM32G081RBT6 and STM32G071RBT6 are not the same, but they are very similar. Both have 128 KB Flash, 36 KB SRAM, and the same LQFP-64 package, but the G081 includes additional features like a true random number generator (RNG) and a CRC calculation unit, which the G071 lacks.

What is the best NXP equivalent for STM32G081RBT6?

The best NXP equivalent for STM32G081RBT6 is the LPC845, which is a Cortex-M0+ MCU with 64 KB Flash and 16 KB SRAM. However, it is not pin-compatible and has fewer peripherals, so it is not a drop-in replacement. For a true drop-in, stick with ST's own STM32G071RBT6.

Engineering reference data for STM32G081RBT6 — comparison, design guidance, and compliance information.

Selection Guide

Choose the STM32G081RBT6 when you need a high-performance Cortex-M0+ MCU with 128 KB Flash, 36 KB SRAM, USB, and security features like RNG and CRC. It is ideal for applications requiring real-time control, connectivity, and moderate memory. If you don't need USB or RNG, the STM32G071RBT6 is a cost-effective drop-in alternative. For applications with lower memory requirements, the STM32G071R8T6 (64 KB Flash) may suffice. The NXP LPC845 is a cross-brand option but is not pin-compatible and has lower performance, so it is only suitable for new designs where PCB layout can be adjusted. For automotive applications, consider the AEC-Q100 qualified variant STM32G081RBI6.

Comparison with Alternatives

Parameter	This Product	STM32G071RBT6	STM32G081RBT6TR	STM32G081RBI6	STM32G071R8T6	LPC845
Package	LQFP-64	LQFP-64 - same	LQFP-64 - same	LQFP-64 - same	LQFP-64 - same	LQFP-64 - same
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	NXP Semiconductors
Core	ARM Cortex-M0+	ARM Cortex-M0+	ARM Cortex-M0+	ARM Cortex-M0+	ARM Cortex-M0+	ARM Cortex-M0+
Maximum Frequency	64 MHz	64 MHz	64 MHz	64 MHz	64 MHz	30 MHz
Flash Memory	128 KB	128 KB	128 KB	128 KB	64 KB	64 KB
SRAM	36 KB	36 KB	36 KB	36 KB	36 KB	16 KB
USB Interface	Yes (USB 2.0 FS)	Yes (USB 2.0 FS)	Yes (USB 2.0 FS)	Yes (USB 2.0 FS)	Yes (USB 2.0 FS)	No
RNG	Yes	No	Yes	Yes	No	No

Key Differentiators

Higher maximum frequency (64 MHz) compared to some alternatives (vs LPC845)
Larger Flash and SRAM (vs STM32G071R8T6)
Integrated USB and RNG (vs STM32G071RBT6)

Design Notes

Decouple each VDD pin with a 100nF ceramic capacitor placed as close as possible to the pin. Additionally, place a 4.7uF bulk capacitor on the main supply. For VDDA, use a 1uF capacitor and a ferrite bead to isolate analog noise. Ensure VDD and VDDA are connected through a low-impedance path.

For the LQFP-64 package, ensure proper solder paste stencil design to avoid bridging. Use a 0.5mm pitch land pattern. Provide a solid ground plane under the MCU to reduce EMI. Keep high-speed signals (USB, SPI) short and impedance-controlled if possible.

Do not leave unused GPIO pins floating; configure them as outputs or enable internal pull-ups/pull-downs to reduce leakage. Ensure the BOOT0 pin is properly pulled low for normal boot from Flash. For low-power modes, disable unused peripherals and clocks to achieve the specified current consumption.

Compliance Information

RoHS

Compliant

REACH

Compliant

AEC-Q100

Not Qualified

Lead Free

Yes

Halogen Free

Yes

Conflict Minerals

Compliant

RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified for standard version; choose STM32G081RBI6 for automotive grade.

Data verified on: 2026-08-13

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