My Inquiry
My Account
STMicroelectronics STM32G081GBU6
- Part No.:
- STM32G081GBU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-UFQFN
- Datasheet:
-
STM32G081GBU6.pdf
- Description:
- IC MCU 32BIT 128KB FLSH 28UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,824
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32G081GBU6 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 - deployed in industrial sensor nodes requiring secure local data processing and low-power wireless telemetry.
For engineers reviewing the STM32G081GBU6 datasheet, STM32G081GBU6 pinout, STM32G081GBU6 application, or STM32G081GBU6 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use-value analysis for embedded control, and validated alternative selection guidance based on functional alignment and peripheral compatibility.
Technical Context
The STM32G081GBU6 integrates an Arm Cortex-M0+ core with MPU, supporting memory protection and secure boot via securable flash area. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and ±1% HSI16 RC with PLL - enabling precise timing for USB-C PD negotiation and RTC alarm wakeup from Stop mode.
It features a 7-channel DMA controller with flexible peripheral mapping, two low-power analog comparators with rail-to-rail I/O, and four USARTs - two with ISO7816/LIN/IrDA support and auto-baud detection - making it suitable for smart metering and point-of-sale terminal communication stacks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 64 MHz max - enables deterministic real-time control with <10 ns interrupt latency for motor commutation timing. |
| Flash / RAM | 128 KB flash (with securable area), 36 KB SRAM (32 KB with HW parity) - supports firmware updates with integrity checking and safety-critical variable storage. |
| ADC | 12-bit, 0.4 µs conversion, up to 16 external channels, 16-bit oversampling - delivers 92 dB SNR for precision current sensing in power supplies. |
| DAC | Two 12-bit DACs with sample-and-hold - enables simultaneous analog waveform generation for sensor calibration and actuator biasing. |
| Communication | Four USARTs (2 ISO7816/LIN/IrDA), two I²C (Fast-mode Plus), two SPI (32 Mbit/s), HDMI CEC, USB-C PD controller - supports multi-protocol fieldbus bridging in building automation gateways. |
| Security | AES-128/256 hardware accelerator + true RNG - meets IEC 62443-3-3 SL2 requirements for encrypted firmware image verification and key derivation. |
| Power Modes | Sleep, Stop, Standby, Shutdown; 150 nA shutdown current - extends battery life in coin-cell-powered IoT endpoints beyond 10 years. |
Pinout & Package
STM32G081GBU6 is housed in a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package, 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, VDDA, VSS, VSSA | Power supply and ground | Separate analog/digital domains ensure <1 LSB ADC noise floor; VDDA must be ≥ VDD for full ADC accuracy. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1 | General-purpose I/O | Up to 60 pins; all mappable to EXTI; multiple 5 V-tolerant - simplifies level-shifting in mixed-voltage industrial interfaces. |
| PA2/PA3, PA9/PA10, PB6/PB7, PB10/PB11 | USART TX/RX | Four independent USARTs; PA9/PA10 support ISO7816 T=0/T=1 and LIN master mode with sync break generation. |
| PA4–PA7, PB0–PB1, PB12–PB15 | ADC inputs | 16 external ADC channels; internal temperature sensor and VREFINT available - enables self-calibration without external components. |
| PA4, PA5 | DAC outputs | Two independent DAC channels with configurable output buffers - drives analog actuators or reference voltages directly. |
| PA13/PA14, PA15 | SWD debug | Serial Wire Debug (SWD) interface - enables non-intrusive real-time debugging and flash programming via standard J-Link or ST-LINK. |
Key Features
| Feature | Design Value |
|---|---|
| USB Type-C Power Delivery controller | Integrated PD PHY and policy engine - eliminates external PD controller IC in portable medical chargers and USB-C powered test equipment. |
| Calendar RTC with alarm & wakeup | Accurate timekeeping with ±1 ppm drift (calibrated LSE); wakes CPU from Stop/Standby in <5 µs - enables scheduled sensor sampling at sub-second intervals. |
| Low-power timers (LPTIM1/LPTIM2) | Asynchronous operation from LSE or ultra-low-power RC; 32-bit counter resolution - achieves precise 1 Hz to 100 kHz timing without waking main CPU. |
| Hardware CRC unit | Dedicated 32-bit CRC calculator with programmable polynomial - accelerates firmware signature verification and OTA update integrity checks by 12× vs software CRC. |
| True random-number generator (RNG) | NIST SP800-90B compliant entropy source - provides cryptographically secure keys for TLS handshake and secure boot seed generation. |
Applications
| Industrial Sensor Node | Smart Meter Interface Module |
|---|---|
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ via I²C sensors and transmitting data over LoRaWAN. IC Role / Device Role / Timing Role: Main MCU executing sensor fusion, AES-encrypted payload packaging, and low-power scheduling via LPTIM-triggered wakeups. Use Value: 150 nA shutdown current + RTC alarm ensures 12+ year battery life; dual DACs calibrate sensor offsets in-field without recalibration hardware. |
Use Scenario: DIN-rail mounted electricity meter add-on board handling pulse counting, tariff switching, and secure HAN communication via M-Bus or RF. IC Role / Device Role / Timing Role: Communication co-processor managing ISO7816-based metrology IC interface and IR optical port with IrDA compliance. Use Value: Two ISO7816-capable USARTs enable concurrent metrology IC command/response and utility-side IR diagnostics; AES engine secures firmware updates against tampering. |
| USB-C Powered Test Fixture | Programmable DC Load Controller |
Use Scenario: Benchtop fixture that draws power and negotiates voltage/current via USB-C PD while controlling relay banks and reading shunt voltage via ADC. IC Role / Device Role / Timing Role: System controller integrating USB-C PD policy engine, analog measurement, and GPIO sequencing logic. Use Value: On-die USB-C PD controller reduces BOM count by one IC; 12-bit ADC with 16× oversampling achieves 0.1% shunt current measurement accuracy. |
Use Scenario: Constant-current electronic load for power supply validation, adjusting MOSFET gate drive via DAC and monitoring voltage/current in real time. IC Role / Device Role / Timing Role: Precision analog controller generating DAC-set reference for op-amp gate driver and synchronizing ADC sampling with PWM switching. Use Value: Dual 12-bit DACs provide independent Vref and Iref paths; 14 timers include advanced TIM1 for synchronized PWM/ADC triggering at 128 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G071GBU6 | Same package, 128 KB flash but only 32 KB SRAM; no second DAC; no USB-C PD controller | Lacks USB-C PD and dual DAC - unsuitable for USB-C powered devices or dual-channel analog output systems | Select when cost-sensitive designs omit USB-C PD and require only single DAC output. |
| STM32G0B1CBT6 | LQFP48 package; 128 KB flash, 32 KB SRAM; adds CAN FD controller and higher-temp grade (−40°C to 125°C) | Includes CAN FD for automotive body control modules; wider temp range suits under-hood applications | Choose for CAN-based vehicle subsystems or extended-temperature industrial environments where CAN FD is required. |
Compared with STM32G071GBU6, the G081GBU6 adds USB-C PD and a second DAC - critical for compact USB-powered instrumentation. Versus STM32G0B1CBT6, it trades CAN FD and extended temperature for lower system cost and smaller footprint in consumer-grade portable equipment.
Availability
STM32G081GBU6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interface modules, USB-C powered test fixtures, and programmable DC load controllers requiring stable component supply across multi-year production cycles.
Supply support for STM32G081GBU6 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 chips for industrial, automotive, and consumer markets.
The STM32G0 series targets cost-sensitive, low-power embedded applications demanding security, rich analog integration, and USB-C readiness - optimized for smart home, metering, and portable industrial tools.
FAQ
What is the maximum operating frequency and voltage range of the STM32G081GBU6?
The STM32G081GBU6 operates at up to 64 MHz with a supply voltage range of 1.7 V to 3.6 V. Its internal 16 MHz RC oscillator is factory-trimmed to ±1% accuracy and can feed the PLL for full-speed operation without external crystals - enabling robust clocking in space-constrained designs where crystal placement is impractical.
Does the STM32G081GBU6 support secure firmware updates?
Yes. It includes a securable flash area, hardware AES-128/256 accelerator, true RNG, and memory protection unit (MPU). These features enable authenticated and encrypted firmware images, secure key storage, and runtime privilege separation - meeting requirements for IEC 62443-3-3 and UL 2900-1 cybersecurity certifications in industrial firmware deployments.
How many USARTs does the STM32G081GBU6 have, and which support ISO7816?
The STM32G081GBU6 integrates four USARTs; USART1 and USART2 support ISO7816 T=0/T=1 protocols, LIN bus, IrDA physical layer, and auto-baud rate detection. This allows direct interfacing with smart card readers, metrology ICs, and legacy industrial terminals without external protocol translators.
What low-power modes are available, and what is the lowest achievable current draw?
The device offers Sleep, Stop, Standby, and Shutdown modes. In Shutdown mode with RTC and backup registers disabled, typical current consumption is 150 nA at 25°C. With RTC active and VBAT supplied, it drops to 300 nA - enabling decade-long operation on CR2032 batteries in maintenance-free sensor deployments.
STM32G081GBU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 28-UFQFN
- 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:
- 26
- 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 12x12b; D/A 2x12b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G081GBU6 FAQ
1.How can I place an order for STM32G081GBU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G081GBU6 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 STM32G081GBU6 reliable?
The price and inventory of STM32G081GBU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G081GBU6 is usually 5 days.
3.What payment methods are accepted for STM32G081GBU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G081GBU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G081GBU6?
STM32G081GBU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G081GBU6 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 STM32G081GBU6?
For technical support, including STM32G081GBU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G081GBU6 requirements.
6.How does Aetrix verify that STM32G081GBU6 is sourced from the original manufacturer or authorized distributors?
All STM32G081GBU6 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 STM32G081GBU6 meets industry standards.
7.What is the process for return or replacement of STM32G081GBU6?
All STM32G081GBU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G081GBU6, 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 STM32G081GBU6 part is unused and in its original packaging.
Return procedure for STM32G081GBU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G081GBU6 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
