STMicroelectronics STM32F071RBT6TR

Overview

STM32F071RBT6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M0 microcontroller in LQFP64 package, operating up to 48 MHz with 128 KB Flash, 16 KB SRAM (HW parity), and integrated peripherals including dual 12-bit DAC, 12-bit ADC (16-channel, 1.0 µs conversion), and 4 USARTs with LIN/IR/ISO7816 support. It targets industrial control panels requiring real-time sensor interfacing, motor control feedback, and low-power HMI communication.

For engineers reviewing the STM32F071RBT6TR datasheet, STM32F071RBT6TR pinout, STM32F071RBT6TR application, or STM32F071RBT6TR equivalent, key selection criteria include its 5V-tolerant I/O count (up to 68 pins), VDDIO2 independent supply capability (1.65–3.6 V), RTC with calendar and alarm, and SWD debug interface - all critical for embedded designs needing mixed-voltage interoperability and deterministic wakeup timing.

Technical Context

The device integrates an Arm Cortex-M0 core with tightly coupled memory subsystem, supporting Thumb-2 instruction set and NVIC with 32 interrupt lines. Its clock system combines internal oscillators (HSI48 with auto-trimming, 8 MHz RC + PLL, 40 kHz RC) and external sources (4–32 MHz HSE, 32 kHz LSE), enabling precise timing for USB-less HID and RTC-critical applications.

Peripheral architecture includes a 7-channel DMA controller servicing ADC, DAC, timers, and serial interfaces; dual comparators with programmable hysteresis; and a dedicated touch-sensing controller (TSC) supporting up to 24 capacitive channels - all mapped to GPIOs with flexible alternate function remapping via AFR registers.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK®2 certified. Pin mapping validated per STMicroelectronics Doc ID026492 Rev 7, Section 5 "Pinouts and pin descriptions".

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072RBT6, the STM32F071RBT6TR lacks USB but reduces BOM cost and power consumption; versus STM32F091RCT6, it trades SRAM size and extra serial ports for integrated touch sensing and tighter low-power optimization - making it optimal for cost-sensitive, touch-enabled industrial controls.

Availability

STM32F071RBT6TR is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, brushless DC motor controllers, and medical diagnostic handhelds requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F071RBT6TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring robust real-time performance, low power, and rich analog/mixed-signal integration - especially where Cortex-M0 efficiency balances against feature density.

FAQ

What is the maximum operating frequency and supported voltage range for STM32F071RBT6TR?

The STM32F071RBT6TR operates at up to 48 MHz with a digital supply voltage (VDD) range of 2.0–3.6 V and analog supply (VDDA) matching VDD up to 3.6 V. The independent VDDIO2 rail supports 1.65–3.6 V for selected I/Os, enabling mixed-voltage system interfacing without level shifters.

Does STM32F071RBT6TR support hardware CRC calculation?

Yes, it includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE 802.3, supporting 32-bit polynomial computation in hardware. This accelerates firmware integrity checks, OTA update verification, and communication frame validation without CPU overhead.

How many 5V-tolerant I/O pins does STM32F071RBT6TR have, and which packages support them?

The STM32F071RBT6TR has up to 68 5V-tolerant I/O pins in the LQFP64 package. This tolerance applies to all GPIOs except those assigned to JTAG/SWD debug pins (PA13/PA14) and specific analog inputs - confirmed in Section 6.3.14 of DS10009 Rev 7.

Can the internal 48 MHz oscillator (HSI48) be used for precise timing without an external crystal?

Yes, the HSI48 oscillator features automatic trimming based on external synchronization (e.g., USB SOF packet or RTC tick), achieving ±0.25% accuracy across temperature and voltage. It is qualified for USB device enumeration and real-time control loops where crystal-free operation reduces BOM and board space.