STMicroelectronics STM32C071RBT6N

Overview

STM32C071RBT6N 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 requiring low-power operation and secure firmware updates.

For engineers reviewing the STM32C071RBT6N datasheet, STM32C071RBT6N pinout, STM32C071RBT6N application, or STM32C071RBT6N equivalent, key selection criteria include USB FS crystal-less capability, 5 V-tolerant I/Os across all 61 pins, -40°C to 125°C extended temperature grade, and hardware parity on SRAM for functional safety compliance in motor control edge devices.

Technical Context

The STM32C071RBT6N integrates an Arm Cortex-M0+ core with MPU, operating up to 48 MHz, and features dual clock recovery systems: HSI48 (±1%) and HSIUSB48 for USB timing without external crystal. Its memory subsystem includes securable flash area and 24 KB SRAM with hardware parity check.

Peripheral interconnect supports flexible DMA mapping across five channels, with dedicated DMAMUX for routing ADC, timers, and communication interfaces. The RTC includes calendar function and alarm, while advanced timer TIM1 enables three-phase motor control with complementary outputs and dead-time insertion.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in continuous PWM-driven motor gate drivers and high-density industrial control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G071RBT6, the C071RBT6N trades clock speed for USB crystal-less integration and extended temperature range; versus RP2040, it adds hardware safety features and industrial-grade qualification at modest cost premium.

Availability

STM32C071RBT6N is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, automotive body electronics, and portable medical devices requiring stable component supply across long-lifecycle programs.

Supply support for STM32C071RBT6N 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, specializing in microcontrollers, power management, and automotive ICs with vertical manufacturing and AEC-Q100 qualification expertise.

The STM32C0 series targets cost-sensitive, high-volume industrial and appliance applications requiring robust peripherals, extended temperature operation, and simplified USB integration - positioning it between legacy C031 and mainstream G0 families.

FAQ

What is the maximum operating frequency and core architecture of the STM32C071RBT6N?

The STM32C071RBT6N features an Arm Cortex-M0+ core rated for up to 48 MHz operation. It includes a Memory Protection Unit (MPU), single-cycle I/O access, and Thumb-2 instruction set. Performance is measured at 38.4 CoreMark/MHz, delivering deterministic real-time response for motor control and sensor fusion tasks without cache or branch prediction overhead.

Does the STM32C071RBT6N support crystal-less USB Full-Speed operation?

Yes - the STM32C071RBT6N integrates an HSI48 oscillator with clock recovery system (CRS) that synchronizes to the USB SOF packet, enabling fully crystal-less USB 2.0 Full-Speed device operation. This eliminates the need for an external 48 MHz crystal and associated capacitors, reducing BOM cost and PCB layout complexity while maintaining ±0.25% USB timing accuracy.

What low-power modes are available and what is the typical current draw in Stop mode?

The device supports Sleep, Stop, Standby, and Shutdown modes. In Stop mode with RTC enabled and ultra-low-power regulator active, typical current consumption is 0.34 µA at 25°C (VDD = 3.3 V). Wake-up time from Stop is 4.5 µs, and the mode retains SRAM content and register states while disabling the CPU, flash, and most peripherals.

How many I/O pins are 5 V-tolerant and what is the maximum number of ADC channels?

All 61 GPIOs on the LQFP64 package are 5 V-tolerant, allowing direct connection to 5 V logic without external level shifters. The 12-bit ADC supports up to 19 external input channels plus internal temperature sensor and VREFINT, with conversion time as low as 0.4 µs and programmable sampling windows for accurate current sensing in motor phase legs.