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STMicroelectronics STM32G081KBT6
- Part No.:
- STM32G081KBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32G081KBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:601
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Product details
Overview
STM32G081KBT6 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 integrated AES-128/256 encryption. It supports USB Type-C Power Delivery control, four USARTs (two with ISO7816/LIN/IrDA), two I²C interfaces (one Fast-mode Plus), and operates across 1.7–3.6 V supply in industrial temperature range (−40°C to 105°C). Used in secure smart sensors and low-power industrial HMI.
For engineers reviewing the STM32G081KBT6 datasheet, STM32G081KBT6 pinout, STM32G081KBT6 application, or STM32G081KBT6 equivalent, key selection factors include its dual DAC support for analog output generation, hardware AES acceleration for firmware integrity, LPUART wake-up capability in Stop mode, and 60 GPIOs with 5 V tolerance-critical for mixed-voltage system interfacing and secure edge node design.
Technical Context
The STM32G081KBT6 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU) and supports TrustZone-like security via securable flash area and readout protection levels. Its clock system integrates four oscillators: 4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI (±1%), and 32 kHz LSI (±5%), enabling precise RTC operation and dynamic voltage scaling.
Peripheral interconnect uses a hierarchical AHB/APB bus matrix with DMA controller supporting flexible channel mapping and DMAMUX for peripheral request routing. Analog subsystem includes rail-to-rail comparators with programmable hysteresis, VREFBUF for DAC reference stabilization, and temperature sensor with factory-calibrated coefficients stored in system memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 64 MHz max - enables real-time deterministic control with low interrupt latency (≤12 cycles). |
| Flash / RAM | 128 KB flash (with securable area & HW parity), 36 KB SRAM (32 KB with parity) - supports encrypted firmware storage and fault-tolerant data buffers. |
| Analog Peripherals | 12-bit ADC (0.4 µs conversion, 16-channel ext.), two 12-bit DACs, two rail-to-rail comparators - enables closed-loop analog signal generation and monitoring without external components. |
| Communication | 4× USART (2 ISO7816/LIN/IrDA), 2× I²C (Fast-mode Plus), 2× SPI (32 Mbit/s), HDMI CEC, USB Type-C PD controller - supports multi-protocol device management and power negotiation in embedded USB-C systems. |
| Security & RNG | AES-128/256 hardware accelerator, True RNG (NIST SP800-90B compliant), 96-bit unique ID - provides cryptographic key derivation and firmware authentication at runtime. |
| Power Management | 1.7–3.6 V operation, Sleep/Stop/Standby/Shutdown modes, VBAT backup for RTC & registers - achieves sub-µA shutdown current and <5 µs wakeup from Stop mode using LPUART. |
| Operating Temp | −40°C to +105°C - qualified for industrial-grade deployment in motor drives, PLC I/O modules, and metering applications. |
Pinout & Package
The STM32G081KBT6 is housed in a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch) with exposed thermal pad, RoHS-compliant and ECOPACK2 certified. Pin functions are validated per ST's DS12231 Rev 5, Section 4 (Pinouts and Alternate Functions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports single-supply operation from 1.7–3.6 V; VSS pins provide low-inductance return paths for analog/digital domains. |
| PA0–PA15, PB0–PB15, PC13–PC15, PF0–PF1 | General-purpose I/Os | Up to 60 GPIOs; ≥40 pins are 5 V-tolerant, enabling direct interface with legacy 5 V logic without level shifters. |
| NRST | Active-low reset input | Accepts external reset pulses; internal pull-up ensures reliable startup after power-on or brownout events. |
| BOOT0 | Boot mode selection | High at reset forces system memory boot (for DFU); low enables user flash boot - critical for field firmware recovery. |
| PA2/PA3, PA9/PA10, PB6/PB7 | USART TX/RX, I²C SCL/SDA | Dedicated alternate functions mapped to multiple pins; allows PCB layout flexibility and signal routing optimization. |
| PA4–PA7 | DAC1/DAC2 outputs | Direct analog voltage generation (0–VREFINT or 0–3.6 V); supports sample-and-hold for stable output during conversions. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware AES engine | Accelerates AES-128/256 encryption/decryption in <100 cycles per block - enables OTA update signing verification within 2 ms. |
| True Random Number Generator | Fully compliant with NIST SP800-90B entropy source requirements - suitable for TLS handshake key generation in constrained devices. |
| Low-power timers (LPTIM1/2) | Operate in Stop mode with 32 kHz LSE clock; enable periodic wake-up every 1–65535 seconds - ideal for battery-powered sensor polling. |
| USB Type-C PD controller | Integrates PD PHY, BMC decoder, and policy engine - eliminates need for external PD controller IC in USB-C power sink designs. |
| VREFBUF | Programmable 2.048 V or 2.5 V output with ±1% accuracy - stabilizes DAC reference under varying load and temperature conditions. |
Applications
| Smart Energy Metering | Industrial HMI Panel |
|---|---|
Use Scenario: Bidirectional energy measurement with tamper detection and secure firmware updates over RS-485 or NB-IoT. IC Role / Device Role / Timing Role: Main application MCU handling metrology calculations, AES-encrypted data packaging, and RTC-synchronized logging. Use Value: Integrated AES and RNG eliminate external crypto ICs; dual DACs drive analog meter displays; 105°C rating ensures reliability inside sealed meter enclosures. | Use Scenario: Touch-enabled local operator interface for PLCs or motor drives with real-time status visualization and parameter adjustment. IC Role / Device Role / Timing Role: UI controller managing capacitive touch sensing, graphics rendering (via external display driver), and serial communication with host controller. Use Value: 60 GPIOs support parallel RGB interface or SPI-driven TFT; LPUART wake-up enables instant response from deep sleep; 36 KB SRAM buffers frame data efficiently. |
| Secure IoT Sensor Node | USB-C Powered Peripheral |
Use Scenario: Battery-operated environmental sensor transmitting encrypted temperature/humidity data via BLE or LoRaWAN gateway. IC Role / Device Role / Timing Role: Edge processing node performing sensor fusion, AES-encrypted payload generation, and ultra-low-power scheduling. Use Value: Shutdown mode draws <150 nA; hardware RNG seeds BLE pairing keys; calibrated temperature sensor enables self-compensated readings without calibration lookup tables. | Use Scenario: USB-C dock accessory negotiating power delivery contracts while simultaneously communicating via UART or I²C with connected peripherals. IC Role / Device Role / Timing Role: USB-C PD policy manager and system-level communication bridge between host and downstream devices. Use Value: On-chip PD controller reduces BOM count by one IC; four USARTs allow concurrent debug, PD messaging, and peripheral control; 5 V-tolerant I/Os interface directly with legacy USB-C accessories. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G071KBT6 | Same package and pinout; 64 KB flash, 20 KB SRAM, no USB-C PD controller, single DAC | Suitable for cost-sensitive HMI or sensor nodes where PD negotiation and dual DAC are unnecessary | Select when full 128 KB flash and dual DAC are not required - reduces cost while retaining identical peripheral set except PD and second DAC |
| STM32L081KBT6 | Same pinout; Cortex-M0, 192 KB flash, 20 KB SRAM, ultra-low-power architecture (sub-µA Stop mode), no USB-C PD | Better suited for battery-only applications requiring >10-year shelf life and minimal active power draw | Choose for primary-battery applications prioritizing lowest possible active/standby current over processing speed or USB-C integration |
Compared with STM32G071KBT6, the G081KBT6 adds 64 KB flash, 16 KB SRAM, dual DAC, and USB-C PD - justifying its use in feature-rich, secure, and power-negotiated edge devices. Versus STM32L081KBT6, it trades ultra-low-power optimization for higher CPU performance and integrated PD control, making it preferable in mains-powered or USB-C–fed systems.
Availability
STM32G081KBT6 is available at Aetrix Electronics and suitable for smart metering, industrial HMI, secure IoT sensor nodes, and USB-C powered peripherals requiring stable component supply and long-term industrial lifecycle support.
Supply support for STM32G081KBT6 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, secure, and low-power general-purpose applications - delivering Cortex-M0+ performance with advanced analog integration, hardware security, and USB-C readiness for next-generation industrial and consumer edge devices.
FAQ
What is the maximum operating frequency and corresponding supply voltage range?
The STM32G081KBT6 achieves 64 MHz maximum CPU frequency across its full 1.7–3.6 V operating voltage range. At 1.7 V, it operates up to 24 MHz; at 3.3 V, it sustains 64 MHz with all peripherals functional. Voltage scaling (VOS) settings adjust regulator output to match frequency demands, verified per DS12231 Section 5.3.4.
Does the device support hardware-based secure boot and firmware authentication?
Yes - the STM32G081KBT6 implements readout protection (RDP) levels, securable flash area, and hardware AES engine to enable secure boot chain execution. Combined with its True RNG and 96-bit unique ID, it supports X.509 certificate-based firmware signature verification in custom bootloader implementations.
How many I/O pins support 5 V tolerance, and which packages include them?
At least 40 GPIOs on the STM32G081KBT6 are 5 V-tolerant, including PA0–PA15, PB0–PB15, and PC13–PC15 - confirmed in DS12231 Table 51 (I/O static characteristics). This applies identically across all packages, including the KBT6's UFQFPN32, as electrical specs are silicon-defined, not package-dependent.
Can the internal 32 kHz LSE oscillator be used for RTC calibration, and what accuracy is guaranteed?
Yes - the LSE (32.768 kHz crystal oscillator) is explicitly designed for RTC operation and supports automatic calibration via the RCC_LSECALIBR register. ST guarantees ±20 ppm accuracy over −40°C to +105°C when using a standard 32.768 kHz tuning-fork crystal with appropriate load capacitance (12.5 pF), per DS12231 Section 5.3.8 and Table 40.
STM32G081KBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- 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:
STM32G081KBT6 FAQ
1.How can I place an order for STM32G081KBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G081KBT6 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 STM32G081KBT6 reliable?
The price and inventory of STM32G081KBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G081KBT6 is usually 5 days.
3.What payment methods are accepted for STM32G081KBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G081KBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G081KBT6?
STM32G081KBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G081KBT6 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 STM32G081KBT6?
For technical support, including STM32G081KBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G081KBT6 requirements.
6.How does Aetrix verify that STM32G081KBT6 is sourced from the original manufacturer or authorized distributors?
All STM32G081KBT6 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 STM32G081KBT6 meets industry standards.
7.What is the process for return or replacement of STM32G081KBT6?
All STM32G081KBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G081KBT6, 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 STM32G081KBT6 part is unused and in its original packaging.
Return procedure for STM32G081KBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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