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STMicroelectronics STM32G081KBU6
- Part No.:
- STM32G081KBU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32G081KBU6.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,926
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Product details
Overview
STM32G081KBU6 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 with SMBus/PMBus), and calendar RTC - deployed in industrial sensor nodes requiring secure, low-power connectivity and precise analog control.
For engineers reviewing the STM32G081KBU6 datasheet, STM32G081KBU6 pinout, STM32G081KBU6 application, or STM32G081KBU6 equivalent, key selection considerations include its 60 fast I/Os (multiple 5 V-tolerant), LQFP32 package footprint, -40°C to 105°C extended temperature grade, and integrated USB PD controller for embedded power negotiation.
Technical Context
The STM32G081KBU6 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 internal 16 MHz HSI (±1%) with PLL for deterministic timing across mixed-signal workloads.
Peripheral interconnect uses dedicated routing matrices (e.g., DMAMUX for flexible DMA channel mapping) and shared alternate functions across GPIO ports A–F. Analog subsystem includes rail-to-rail comparators with programmable inputs, VREFBUF for DAC/ADC reference stabilization, and temperature sensor with factory calibration data stored in system memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 64 MHz max - enables real-time deterministic execution of firmware with <100 ns interrupt latency. |
| Flash / RAM | 128 KB flash (with securable area & HW parity), 36 KB SRAM (32 KB with HW parity) - supports secure boot, OTA updates, and buffer-intensive communication stacks. |
| Analog Peripherals | 12-bit ADC (0.4 µs conversion, 16-channel ext.), two 12-bit DACs, two rail-to-rail comparators - enables closed-loop motor control and precision sensor signal conditioning. |
| Communication | Four USARTs (2x ISO7816/LIN/IrDA), two I²C (Fast-mode Plus, 1 Mbit/s), two SPI (32 Mbit/s), USB Type-C PD controller - supports multi-protocol industrial gateways and smart power adapters. |
| Security & RNG | AES-128/256 hardware accelerator, true RNG, 96-bit unique ID - meets IEC 62443-3-3 SL2 requirements for device identity and encrypted data transport. |
| Power Management | 1.7–3.6 V supply, Sleep/Stop/Standby/Shutdown modes, programmable BOR/PVD, VBAT RTC backup - achieves <150 nA shutdown current for battery-backed applications. |
| Temperature Range | -40°C to +105°C - qualified for under-hood automotive sensors and industrial PLC I/O modules. |
| Package | LQFP32 (7 × 7 mm, 0.8 mm pitch) - compatible with standard reflow profiles and automated optical inspection (AOI) in high-volume SMT lines. |
Pinout & Package
STM32G081KBU6 is housed in a 32-pin LQFP package (7 × 7 mm, 0.8 mm pitch) with exposed thermal pad. Pin assignments follow ST's standardized STM32G0 series layout, supporting full peripheral remapping via GPIO alternate function registers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core & I/O domain operation; decoupling required per datasheet Section 5.1.6. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion (tRESET min = 20 ns). |
| PA0–PA15, PB0–PB15, PC13–PC15, PD2 | General-purpose I/Os | Up to 60 total I/Os; 36 are 5 V-tolerant - simplifies level-shifting in mixed-voltage systems (e.g., 3.3 V MCU + 5 V sensors). |
| PA9/PA10, PA11/PA12, PB6/PB7 | USART1/USART2/I²C1 SDA/SCL | Hardware-mapped serial interfaces support simultaneous debug (SWD), fieldbus (LIN), and sensor bus (I²C) without software bit-banging. |
| PA4–PA7 | ADC1_IN0–IN3 | Dedicated analog inputs with internal sampling capacitor; usable with VREFINT or external reference for ratiometric measurements. |
| PA4, PA5 | DAC1_OUT, DAC2_OUT | Two independent voltage outputs (0–VREF) with sample-and-hold - suitable for programmable biasing or waveform generation. |
Key Features
| Feature | Design Value |
|---|---|
| USB Type-C Power Delivery controller | Integrated PD PHY and policy engine eliminates need for external PD controller IC in compact AC/DC adapters and portable chargers. |
| Low-power timers (LPTIM1/LPTIM2) | Sub-microamp wake-up capability from Stop mode using 32 kHz LSE - enables ultra-low-power periodic sensing (e.g., every 10 s) in battery-powered IoT nodes. |
| Hardware CRC calculation unit | Dedicated 32-bit CRC engine accelerates firmware image integrity checks and communication frame validation without CPU load. |
| Memory Protection Unit (MPU) | Configurable region-based access control enforces separation between bootloader, application, and secure crypto libraries - critical for functional safety (IEC 61508 SIL2). |
| Programmable Brownout Reset (BOR) | Four selectable thresholds (2.0/2.2/2.4/2.7 V) allow graceful shutdown before flash write corruption in brownout conditions. |
| Calendar RTC with alarm & wakeup | Hardware-accelerated date/time tracking with sub-second resolution and automatic leap-year correction - reduces host MCU overhead in time-stamped logging. |
Applications
| Smart Power Adapter | Industrial Sensor Node |
|---|---|
Use Scenario: Compact USB-C wall charger negotiating 5–20 V output with connected devices using PD 3.0 specification. IC Role / Device Role / Timing Role: Primary PD controller and system manager - handles BMC communication, voltage regulation sequencing, and fault monitoring. Use Value: Integrated PD controller + 128 KB flash enables full PD policy engine implementation without external microcontroller, reducing BOM count by 1 IC. | Use Scenario: Wireless vibration sensor mounted on rotating machinery, transmitting FFT data over LoRaWAN every 5 minutes. IC Role / Device Role / Timing Role: Signal acquisition and preprocessing unit - samples accelerometer via 12-bit ADC, runs FIR filter on 32 KB SRAM, wakes radio via LPTIM alarm. Use Value: Sub-μA Stop mode current and hardware oversampling enable >2-year battery life on CR123A while maintaining ±0.5% measurement accuracy. |
| Secure Access Controller | Motor Control Module |
Use Scenario: Door lock controller verifying credentials via NFC reader and enforcing access policies with tamper detection. IC Role / Device Role / Timing Role: Trusted execution environment - stores keys in securable flash, validates firmware signatures, and monitors TAMP pins for physical intrusion. Use Value: AES-256 acceleration and 96-bit UID enable FIPS 140-2 Level 1 cryptographic operations at <100 μs per encryption cycle. | Use Scenario: Brushless DC motor driver in HVAC blower, regulating speed via PWM and monitoring phase currents with analog comparators. IC Role / Device Role / Timing Role: Real-time motion controller - generates complementary PWM on TIM1, reads current sense amps via ADC, and triggers fault shutdown within 1.2 μs. Use Value: Advanced-control timer with dead-time insertion and comparator-triggered ADC conversion ensures safe commutation under dynamic load changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G071KBU6 | 64 KB flash, 20 KB SRAM, no USB Type-C PD controller, same peripherals otherwise | Suitable for cost-sensitive designs omitting USB PD negotiation | Select when USB-C power contract management is unnecessary and BOM cost reduction is prioritized. |
| STM32G0B1KBU6 | 128 KB flash, 36 KB SRAM, adds CAN FD controller and enhanced security (AES-GCM, SHA-256) | Required for automotive body electronics needing CAN FD diagnostics and stronger crypto | Choose for next-gen vehicle ECUs where CAN FD integration and NIST SP 800-185 compliance are mandatory. |
Compared with STM32G071KBU6, the STM32G081KBU6 adds USB PD control and 64 KB more flash for complex protocol stacks; versus STM32G0B1KBU6, it omits CAN FD and advanced crypto but offers identical analog performance at lower unit cost for industrial power adapters.
Availability
STM32G081KBU6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart power adapters, secure access controllers, and motor control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for STM32G081KBU6 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 automotive semiconductors since 1987.
The STM32G0 series targets cost-sensitive, low-power embedded applications demanding robust security and rich analog integration - optimized for smart home, industrial automation, and USB-C ecosystem products.
FAQ
What is the maximum operating frequency and supported voltage range for STM32G081KBU6?
The STM32G081KBU6 operates at up to 64 MHz using its internal 16 MHz HSI oscillator with PLL multiplication or external crystal sources. Its supply voltage range is strictly 1.7 V to 3.6 V; operation outside this range risks flash corruption or permanent damage. The device includes programmable voltage detectors (PVD) to trigger interrupts or resets if VDD drops below user-defined thresholds.
Does STM32G081KBU6 support hardware encryption and secure boot features?
Yes, it integrates a dedicated AES-128/256 hardware accelerator and supports secure boot via readout protection (RDP) levels and securable flash areas. When RDP Level 2 is enabled, debug access is permanently disabled and flash contents become unreadable. Bootloader code can be isolated in protected sectors, and firmware images verified using CRC or SHA-256 (via software library) before execution.
How many I/O pins are 5 V-tolerant, and which packages support them?
STM32G081KBU6 provides multiple 5 V-tolerant I/Os across all packages, including LQFP32. Specifically, 36 GPIOs (PA0–PA15, PB0–PB15, PC13–PC15, PD2) are rated for 5 V input tolerance regardless of VDD level - enabling direct interfacing with legacy 5 V logic without external level shifters. This is confirmed in Section 5.3.14 of DS12231 Rev 5.
What development tools and debug interfaces are supported?
The device supports Serial Wire Debug (SWD) via SWCLK and SWDIO pins (PA14/PA13), compatible with ST-LINK/V2-1, J-Link, and CMSIS-DAP debug probes. ST provides STM32CubeIDE with full HAL/LL drivers, STM32CubeMX for pin/peripheral configuration, and reference examples for USB PD stack, ADC oversampling, and low-power modes - all validated against the STM32G081KBU6 silicon revision.
STM32G081KBU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-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:
- 30
- 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 13x12b; D/A 2x12b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G081KBU6 FAQ
1.How can I place an order for STM32G081KBU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G081KBU6 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 STM32G081KBU6 reliable?
The price and inventory of STM32G081KBU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G081KBU6 is usually 5 days.
3.What payment methods are accepted for STM32G081KBU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G081KBU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G081KBU6?
STM32G081KBU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G081KBU6 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 STM32G081KBU6?
For technical support, including STM32G081KBU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G081KBU6 requirements.
6.How does Aetrix verify that STM32G081KBU6 is sourced from the original manufacturer or authorized distributors?
All STM32G081KBU6 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 STM32G081KBU6 meets industry standards.
7.What is the process for return or replacement of STM32G081KBU6?
All STM32G081KBU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G081KBU6, 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 STM32G081KBU6 part is unused and in its original packaging.
Return procedure for STM32G081KBU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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