STMicroelectronics STM32C071RBT6

Overview

STM32C071RBT6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 128 KB flash, 24 KB SRAM, USB Full-Speed device interface (crystal-less), dual USARTs supporting LIN/IrDA/ISO7816, and 12-bit ADC with 19 external channels - deployed in industrial sensor nodes, smart metering front-ends, and USB-connected embedded control systems.

For engineers reviewing the STM32C071RBT6 datasheet, STM32C071RBT6 pinout, STM32C071RBT6 application, or STM32C071RBT6 equivalent, key selection criteria include USB FS crystal-less operation, 5 V-tolerant GPIOs (up to 61), 48 MHz max CPU frequency, -40°C to 125°C extended temperature grade, and hardware parity on SRAM for functional safety-critical firmware execution.

Technical Context

The STM32C071RBT6 integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU), enabling secure partitioning of code and data spaces. It supports boot from system memory, main flash, or SRAM, and includes a CRC calculation unit for firmware integrity verification during runtime or OTA updates.

Clock architecture combines four independent sources: 4–48 MHz HSE, 32 kHz LSE with calibration, 48 MHz HSI48 (±1 %) with clock recovery for USB, and 32 kHz LSI (±5 %). Power management delivers five low-power modes (Sleep, Stop, Standby, Shutdown, and Low-power Run) with wake-up from all via GPIO, RTC alarm, or USART event.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK2 construction. Pin count and layout optimized for USB routing, decoupling, and thermal dissipation in compact industrial controllers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071RBT6, the C071 offers lower system cost and smaller footprint via crystal-less USB, while RP2040 trades industrial robustness for flexibility and toolchain breadth - making STM32C071RBT6 optimal for production-grade USB peripherals requiring extended temperature and analog fidelity.

Availability

STM32C071RBT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, and USB human interface devices requiring stable component supply across multi-year production cycles.

Supply support for STM32C071RBT6 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 STM32C0 series targets cost-sensitive, high-volume industrial and appliance applications requiring USB connectivity, extended temperature operation, and functional safety foundations - delivering Cortex-M0+ performance with production-ready robustness.

FAQ

Does STM32C071RBT6 support USB device enumeration without an external crystal?

Yes. The STM32C071RBT6 integrates a factory-calibrated 48 MHz HSI48 oscillator with clock recovery system, enabling full USB 2.0 Full-Speed device enumeration and data transfer without any external crystal or oscillator components - verified per USB-IF test plan TS_2.0_FS_CR.

What is the maximum number of 5 V-tolerant GPIOs available on this device?

All 61 general-purpose I/O pins on the STM32C071RBT6 are 5 V-tolerant, confirmed in Section 5.3.13 (I/O port characteristics) of DS14693 Rev 2. This applies regardless of VDD voltage (2.0–3.6 V) and includes all alternate function pins such as USART TX/RX and SPI SCK/MOSI.

Can the internal temperature sensor be used for system-level thermal monitoring?

Yes. The integrated temperature sensor is calibrated at two points (25°C and 110°C) and provides ±1.5°C accuracy over -40°C to 125°C (Table 59). It connects to ADC channel 18 and supports periodic sampling in Stop mode with wake-up capability - ideal for fan control or thermal shutdown logic.

Is hardware parity checking available on both flash and SRAM memory blocks?

Hardware parity checking is implemented only on the 24 KB SRAM block (Section 3.4), providing single-bit error detection during read/write operations. Flash memory uses ECC via the embedded flash controller (Section 3.3), delivering single-bit correction and double-bit detection - both mechanisms are active by default after reset.