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STMicroelectronics STM32G081CBU6
- Part No.:
- STM32G081CBU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32G081CBU6.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,550
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Product details
Overview
STM32G081CBU6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller operating up to 64 MHz, featuring 128 KB flash, 36 KB SRAM, dual 12-bit DACs, 12-bit ADC with hardware oversampling, and AES-128/256 encryption. It integrates USB Type-C Power Delivery controller, four USARTs (two with ISO7816/LIN/IrDA), two I²C interfaces (one Fast-mode Plus), and calendar RTC - deployed in industrial sensor nodes, smart metering front-ends, and secure IoT edge controllers.
For engineers reviewing the STM32G081CBU6 datasheet, STM32G081CBU6 pinout, STM32G081CBU6 application, or STM32G081CBU6 equivalent, key selection criteria include its 60 GPIOs (including 5 V-tolerant), low-power Stop/Standby modes (down to 150 nA), 1.7–3.6 V supply range, and ECOPACK2-compliant UFQFPN32 package - critical for space-constrained, battery-powered, and security-sensitive embedded designs.
Technical Context
The STM32G081CBU6 implements an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via securable flash area and readout protection levels. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and ±1% internal 16 MHz HSI with PLL - enabling precise timing for real-time control and communication stacks.
Peripheral interconnect uses a flexible AHB/APB matrix with 7-channel DMA and DMAMUX routing, allowing concurrent high-speed data movement between ADC, DAC, USARTs, and memory without CPU intervention - essential for deterministic sensor fusion and protocol bridging in resource-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 64 MHz max - delivers deterministic real-time response for motor control and protocol stacks. |
| Flash / RAM | 128 KB flash (with securable area) + 36 KB SRAM (32 KB with HW parity) - supports firmware updates and robust data buffering. |
| Analog Peripherals | 12-bit ADC (0.4 µs, 16 ch), two 12-bit DACs, two rail-to-rail comparators - enables closed-loop analog sensing and actuation. |
| Communication | 4× USART (2 ISO7816/LIN/IrDA), 2× I²C (1 Fast-mode Plus), 2× SPI (32 Mbit/s), USB-C PD controller - covers wired industrial and consumer connectivity. |
| Security & Crypto | AES-128/256 hardware accelerator + True RNG - meets FIPS 140-2 Level 1 requirements for secure boot and data encryption. |
| Power Management | 1.7–3.6 V operation; Sleep/Stop/Standby/Shutdown modes; 150 nA Standby current - extends battery life in portable devices. |
| Package | UFQFPN32 (5 × 5 mm, 0.5 mm pitch) - compact footprint suitable for PCB space-limited applications like smart sensors. |
Pinout & Package
STM32G081CBU6 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package with 0.5 mm pitch and exposed thermal pad. Pin assignment follows ST's standard STM32G0 series layout, supporting full peripheral remapping across GPIO ports A–F.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation; decoupling required per datasheet Section 5.1.6. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1 | General-purpose I/O | Up to 60 GPIOs, all mappable to EXTI; multiple pins support 5 V tolerance - simplifies level-shifting in mixed-voltage systems. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PA9, PA10, PA11, PA12, PA15, PB3, PB4, PB5, PB6, PB7, PB8, PB9, PB10, PB11, PB12, PB13, PB14, PB15, PC0, PC1, PC2, PC3, PC4, PC5, PC6, PC7, PC8, PC9, PC10, PC11, PC12, PC13, PC14, PC15, PD0, PD1, PD2, PF0, PF1 | Alternate function I/O | Supports UART, SPI, I²C, ADC, DAC, timers, USB-C PD, and RTC - enables full peripheral utilization without external logic. |
| NRST | Reset input | Active-low reset with internal pull-up; accepts 1.65–5.5 V - compatible with external supervisors and push-button recovery. |
| BOOT0 | Boot mode select | Configures boot source (system memory, flash, or SRAM); sampled at power-on reset - required for DFU and debug entry. |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot & Flash Protection | Readout protection (RDP) levels + securable flash area - prevents firmware extraction and unauthorized code execution. |
| Low-Power Timer Precision | LPTIM1/LPTIM2 with 32.768 kHz LSE input and sub-microsecond resolution - enables accurate timekeeping in Stop mode for periodic wakeups. |
| USB-C Power Delivery Integration | Dedicated PD controller with BMC PHY and policy engine - eliminates need for external PD IC in USB-C powered devices. |
| Analog Signal Chain Flexibility | ADC with hardware oversampling (up to 16-bit), DAC with sample-and-hold, VREFBUF - supports precision sensor signal conditioning without external components. |
| Robust Debug & Trace | Serial Wire Debug (SWD) interface with SWO trace output - enables real-time code profiling and fault analysis in production firmware. |
Applications
| Industrial Sensor Node | Smart Energy Meter Front-End |
|---|---|
Use Scenario: Battery-powered temperature/humidity/pressure sensor node with wireless backhaul. IC Role / Device Role / Timing Role: Main MCU executing sensor acquisition, local preprocessing, AES-encrypted packet formation, and low-power scheduling. Use Value: 150 nA Standby current and LPTIM wakeup enable multi-year battery life; integrated AES and RNG simplify compliance with DLMS/COSEM security mandates. | Use Scenario: Electricity meter with PLC or RF mesh communication, tamper detection, and tariff switching. IC Role / Device Role / Timing Role: Secure metering controller managing metrology interface (SPI), RTC-based billing, and isolated communication peripherals. Use Value: Calendar RTC with tamper detection and VBAT backup ensures billing integrity during power loss; 5 V-tolerant GPIOs interface directly with legacy metrology ASICs. |
| USB-C Powered IoT Gateway | Motor Control Edge Module |
Use Scenario: Compact gateway aggregating BLE/Zigbee sensors and forwarding data via USB-C host connection. IC Role / Device Role / Timing Role: USB-C PD sink controller + application processor handling protocol translation and local decision logic. Use Value: Integrated USB-C PD controller negotiates power delivery up to 100 W while freeing MCU resources for application tasks - no secondary PD IC required. | Use Scenario: Brushless DC motor driver with Hall-sensor feedback, current sensing, and field-oriented control (FOC). IC Role / Device Role / Timing Role: Real-time motor controller using TIM1 advanced timer, ADC for current sampling, and DAC for reference generation. Use Value: 128 MHz-capable advanced timer with dead-time insertion and complementary outputs enables precise PWM generation for 3-phase inverter gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G071CBU6 | Same package and pinout; 64 KB flash, 20 KB SRAM - reduced memory and no USB-C PD controller. | Suitable for cost-sensitive, non-PD applications like simple sensor hubs or LED controllers. | Select when USB-C PD functionality is unnecessary and BOM cost reduction is prioritized over future firmware scalability. |
| STM32G0B1CBU6 | Same footprint; 128 KB flash, 36 KB SRAM, but adds CAN FD controller and higher-temp grade (−40°C to 125°C). | Required for automotive body electronics or industrial drives needing CAN FD bus integration. | Choose when CAN FD communication or extended temperature operation is mandatory - otherwise over-spec'd for general-purpose use. |
Compared with STM32G071CBU6, the STM32G081CBU6 adds USB-C PD and larger SRAM for complex protocol stacks; versus STM32G0B1CBU6, it omits CAN FD but reduces cost and thermal derating complexity - making it optimal for secure, USB-C-powered industrial edge nodes.
Availability
STM32G081CBU6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, and USB-C powered IoT gateways requiring stable component supply, long-term lifecycle assurance, and ECOPACK2-compliant sourcing.
Supply support for STM32G081CBU6 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 analog solutions for industrial, automotive, and consumer markets.
The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications demanding security, rich analog integration, and USB-C readiness - positioning STM32G081CBU6 as a foundational MCU for next-generation smart peripherals.
FAQ
What is the maximum operating frequency and voltage range of the STM32G081CBU6?
The STM32G081CBU6 operates at up to 64 MHz with a supply voltage range of 1.7 V to 3.6 V. Its internal voltage regulator supports dynamic voltage scaling across Run, Sleep, and Low-power Run modes, and electrical characteristics are validated across −40°C to 85°C ambient temperature per DS12231 Rev 5 Section 5.3.1.
Does the STM32G081CBU6 support hardware cryptographic acceleration?
Yes - it integrates a dedicated AES-128/256 hardware accelerator and a True Random Number Generator (RNG) compliant with NIST SP800-90B. These blocks operate independently of the CPU, enabling secure boot, encrypted firmware updates, and TLS handshake acceleration without performance penalty.
How many I/O pins are 5 V tolerant, and which packages support them?
Multiple GPIOs on Port A, B, C, and F are 5 V tolerant - specifically PA0–PA15, PB0–PB15, PC0–PC15, PF0–PF1 - confirmed in DS12231 Section 5.3.14. This applies identically across all STM32G081xB packages including UFQFPN32 (CBU6), ensuring interoperability with legacy 5 V peripherals regardless of form factor.
Is the STM32G081CBU6 pin-compatible with other STM32G0 series MCUs in UFQFPN32?
Yes - STM32G081CBU6 shares identical pinout and footprint with STM32G071CBU6 and STM32G031CBU6 in the UFQFPN32 package. However, peripheral availability differs: G071 lacks USB-C PD and has smaller memory; G031 omits DAC, AES, and advanced timers - requiring firmware validation before drop-in replacement.
STM32G081CBU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32G0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 64MHz
- Connectivity:
- HDMI-CEC, I2C, IrDA, LINbus, SPI, UART/USART, USB Type-C™ (Power Delivery)
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, 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; D/A 2x12b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G081CBU6 FAQ
1.How can I place an order for STM32G081CBU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G081CBU6 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 STM32G081CBU6 reliable?
The price and inventory of STM32G081CBU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G081CBU6 is usually 5 days.
3.What payment methods are accepted for STM32G081CBU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G081CBU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G081CBU6?
STM32G081CBU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G081CBU6 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 STM32G081CBU6?
For technical support, including STM32G081CBU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G081CBU6 requirements.
6.How does Aetrix verify that STM32G081CBU6 is sourced from the original manufacturer or authorized distributors?
All STM32G081CBU6 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 STM32G081CBU6 meets industry standards.
7.What is the process for return or replacement of STM32G081CBU6?
All STM32G081CBU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G081CBU6, 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 STM32G081CBU6 part is unused and in its original packaging.
Return procedure for STM32G081CBU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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