STMicroelectronics STM32G071CBT3

Overview

STM32G071CBT3 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 128 KB Flash, 36 KB SRAM, and operating voltage range of 1.7–3.6 V. It integrates dual 12-bit DACs, a 12-bit 0.4 µs ADC (up to 16 external channels), four USARTs (two with ISO7816/LIN/IrDA), and USB Type-C™ Power Delivery controller - deployed in smart metering, industrial sensor nodes, and battery-powered HMI control panels.

For engineers reviewing the STM32G071CBT3 datasheet, STM32G071CBT3 pinout, STM32G071CBT3 application, or STM32G071CBT3 equivalent, key selection criteria include its 64 MHz CPU frequency, 60 fast I/Os (multiple 5 V-tolerant), low-power Stop/Standby modes, and integrated USB PD controller for source-sink negotiation in compact power adapters.

Technical Context

The STM32G071CBT3 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU), supporting TrustZone-like secure execution isolation. Its clock system combines a 4–48 MHz HSE crystal oscillator, 32 kHz LSE with calibration, and internal 16 MHz RC (±1 %) with PLL - enabling precise timing for real-time motor control and USB PD state machines.

Peripheral interconnect uses a multi-layer AHB/APB bus matrix with flexible DMA mapping (7-channel controller) and dedicated DMAMUX. Analog subsystem includes two rail-to-rail comparators with programmable hysteresis, temperature sensor, VREFINT, and VBAT monitoring - all accessible during Stop mode for wake-up-triggered measurements.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), ECOPACK2-compliant, with exposed thermal pad. Pin count and function mapping validated per STMicroelectronics DS12232 Rev 5, Section 4 (Pinouts and alternate functions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071RBT3, the CB T3 variant offers identical functionality in the same LQFP64 package but with distinct traceability coding; versus STM32G081RBT3, it omits crypto accelerators - making it optimal for cost-sensitive, non-security-critical embedded control where USB PD and analog integration are primary requirements.

Availability

STM32G071CBT3 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and USB-C power adapter designs requiring stable component supply across extended product lifecycles.

Supply support for STM32G071CBT3 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 semiconductors.

The STM32G0 series targets cost-sensitive, ultra-low-power general-purpose applications - delivering Cortex-M0+ performance with enhanced analog integration and USB-C PD capability for next-generation power electronics and IoT edge nodes.

FAQ

What is the maximum operating frequency and supported voltage range for the STM32G071CBT3?

The STM32G071CBT3 operates at up to 64 MHz using its internal 16 MHz RC oscillator with PLL, or external crystal sources. Its supply voltage range is strictly 1.7 V to 3.6 V - operation outside this range may cause functional failure or permanent damage. The device includes programmable voltage detectors (PVD) and Brownout Reset (BOR) to enforce safe operation within spec.

Does the STM32G071CBT3 support USB Type-C Power Delivery negotiation natively?

Yes - the STM32G071CBT3 integrates a full USB Type-C Power Delivery 3.0 controller, including physical layer (PHY), protocol engine, and CC line drivers. It handles SOP messages, voltage/current contract negotiation, and fault management without external PD ICs. External CC logic (e.g., TUSB320) is still required for port role detection (source/sink).

How many analog-to-digital converter channels does the STM32G071CBT3 support, and what is its resolution?

The STM32G071CBT3 features a single 12-bit ADC with up to 16 external input channels and internal sources (temperature sensor, VREFINT, VBAT). Conversion time is 0.4 µs at max speed, and hardware oversampling extends effective resolution to 16 bits. Accuracy is ±1 LSB INL/DNL over temperature, validated per DS12232 Table 58.

Is the STM32G071CBT3 pin-compatible with other STM32G0-series MCUs in LQFP64 package?

Yes - the STM32G071CBT3 shares identical pinout and electrical characteristics with other STM32G071xB variants (e.g., STM32G071RBT3) and selected STM32G081xB parts in LQFP64. However, peripheral enablement (e.g., AES, TRNG) and memory configuration differ; firmware must be verified for feature alignment before substitution.