STMicroelectronics STM32G081CBT6

Overview

STM32G081CBT6 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 requiring secure, low-power edge processing.

For engineers reviewing the STM32G081CBT6 datasheet, STM32G081CBT6 pinout, STM32G081CBT6 application, or STM32G081CBT6 equivalent, key selection criteria include its 64-pin LQFP package, 1.7–3.6 V supply range, -40°C to 125°C extended temperature grade, 14-timer suite (including two 128 MHz-capable advanced timers), and hardware RNG for cryptographic key generation.

Technical Context

The STM32G081CBT6 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 combines 4–48 MHz HSE, 32 kHz LSE with calibration, and internal 16 MHz HSI (±1%) with PLL for precise timing across mixed-signal workloads.

Peripheral interconnect uses a flexible AHB/APB matrix enabling concurrent high-bandwidth DMA transfers (7-channel controller) and low-latency interrupt handling (NVIC with 32 external lines). Analog subsystem includes rail-to-rail comparators, VREFBUF, temperature sensor, and VBAT monitoring - all accessible during Stop/Standby modes for ultra-low-power wake-up scenarios.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), ECOPACK2-compliant, with exposed thermal pad for enhanced heat dissipation in continuous 64 MHz operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071CBT6, the G081CBT6 adds USB-C PD and dual DACs at identical price point; versus STM32G431CBT6, it delivers 64 MHz deterministic real-time control with 30% lower active power - optimal for battery-constrained industrial edge nodes.

Availability

STM32G081CBT6 is available at Aetrix Electronics and suitable for industrial motor control, smart metering, USB-C powered medical devices, and low-power sensor nodes requiring stable component supply across extended temperature and long product lifecycles.

Supply support for STM32G081CBT6 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 analog components for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications demanding robust security and rich analog integration - optimized for smart home, industrial IoT, and portable medical devices.

FAQ

What is the maximum operating frequency and associated voltage range for STM32G081CBT6?

The STM32G081CBT6 operates at up to 64 MHz across its full 1.7–3.6 V supply range. At 1.7–2.0 V, maximum frequency is 24 MHz; 2.0–3.6 V supports full 64 MHz operation. This scaling is enforced by internal voltage regulator and verified per DS12231 Rev 5 Section 5.3.1.

Does STM32G081CBT6 support hardware-based secure boot and firmware encryption?

Yes - it includes a securable flash area, readout protection (RDP) levels, and hardware AES-128/256 acceleration. Secure boot is implemented via option bytes and system memory bootloader with signature verification; encrypted firmware images can be decrypted in-place using the AES engine before execution.

Can the LQFP64 package of STM32G081CBT6 be used with standard PCB assembly processes?

Yes - the LQFP64 (10 × 10 mm, 0.5 mm pitch) is RoHS-compliant and ECOPACK2-certified. It supports standard reflow profiles (J-STD-020D), has defined solder mask expansion and stencil aperture recommendations in ST's AN5053, and is compatible with automated optical inspection (AOI) and X-ray void detection.

How does the USB Type-C Power Delivery controller function without external components?

The integrated PD controller manages CC line signaling, VCONN switching, fault detection (overvoltage/overcurrent), and policy engine execution - requiring only passive resistors on CC1/CC2 and a single external MOSFET for VCONN. No external PD PHY or level shifters are needed, per UM2372 Section 4.2.