STMicroelectronics STM32G081RBI6

Overview

STM32G081RBI6 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 - deployed in industrial sensor nodes requiring secure, low-power edge processing and real-time analog control.

For engineers reviewing the STM32G081RBI6 datasheet, STM32G081RBI6 pinout, STM32G081RBI6 application, or STM32G081RBI6 equivalent, key selection criteria include its 60 GPIO count (with 5 V-tolerance), USB Type-C Power Delivery controller integration, RTC with periodic wakeup from Stop/Standby, and support for SWD debug in LQFP64 package.

Technical Context

The device 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 four oscillators - 4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI (±1%), and 32 kHz LSI (±5%) - enabling precise timing across Run, Stop, and Standby modes.

Analog subsystem includes two rail-to-rail comparators with programmable inputs/outputs, a temperature sensor, VREFINT reference, and VBAT monitoring - all directly interfaced to the 12-bit ADC (0.4 µs conversion, 0–3.6 V range) and dual DACs with sample-and-hold for closed-loop control.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), ECOPACK2-compliant, with exposed pad for thermal dissipation and mechanical stability in high-reliability applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32G071RBT6, the STM32G081RBI6 adds USB-C PD control and extra communication interfaces without increasing power consumption; versus STM32G431RBT6, it trades FPU and speed for lower static current and simpler toolchain requirements in deterministic embedded control.

Availability

STM32G081RBI6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart power adapters, PLC I/O modules, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32G081RBI6 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, sensors, and automotive-grade components since 1987.

The STM32G0 series targets cost-sensitive, low-power general-purpose applications with enhanced security and analog integration - optimized for industrial automation, consumer electronics, and IoT edge devices.

FAQ

What is the maximum operating frequency and supported voltage range for STM32G081RBI6?

The STM32G081RBI6 operates at up to 64 MHz using its internal 16 MHz HSI oscillator with PLL, or external crystal sources. It supports a supply voltage range of 1.7 V to 3.6 V across all operating modes, including full functionality in Stop and Standby modes down to 1.7 V, enabling compatibility with single-cell Li-ion and multi-cell alkaline battery systems.

Does STM32G081RBI6 support hardware-based cryptographic acceleration?

Yes, STM32G081RBI6 integrates a dedicated AES-128/256 hardware accelerator and a True Random Number Generator (RNG). These blocks operate independently of the CPU, enabling high-throughput encryption (exceeding 10 MB/s) and cryptographically secure key generation - essential for secure boot, firmware signing, and TLS offload in resource-constrained endpoints.

How many GPIO pins are available in the LQFP64 package, and what I/O voltage tolerance do they support?

The LQFP64 variant provides up to 60 general-purpose I/O pins, with multiple pins rated for 5 V tolerance even when VDD is 3.3 V or lower. This allows direct interfacing with legacy 5 V logic, industrial sensors, and RS-485 transceivers without external level shifters - confirmed in Section 5.3.14 of the DS12231 datasheet.

Is the USB Type-C Power Delivery controller integrated into the STM32G081RBI6 die, and what interfaces does it use?

Yes, STM32G081RBI6 includes a fully integrated USB Type-C Power Delivery controller that uses dedicated USB_DP and USB_DM pins. It supports PD communication, VCONN switching, and role negotiation without external ICs. The controller interfaces directly with the system via dedicated registers and interrupts, and is documented in Section 3.26 of the datasheet.