STMicroelectronics STM32F071RBT6

Overview

STM32F071RBT6 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 12-bit ADC (1.0 µs), dual-channel 12-bit DAC, two analog comparators, and capacitive touch sensing - deployed in industrial HMI control panels requiring real-time sensor acquisition and local UI rendering.

For engineers reviewing the STM32F071RBT6 datasheet, STM32F071RBT6 pinout, STM32F071RBT6 application, or STM32F071RBT6 equivalent, key selection criteria include 5V-tolerant I/O count (up to 68 pins), VDDIO2 support for mixed-voltage interfaces, RTC with alarm/wakeup from Stop/Standby, and SWD debug compatibility with standard ARM toolchains.

Technical Context

The device implements a single-core Arm Cortex-M0 CPU with Harvard bus architecture, tightly coupled NVIC supporting 32 interrupt lines and configurable priority levels. Memory subsystem includes unified Flash with 24-bit addressing, SRAM with hardware parity checking, and dedicated CRC calculation unit for firmware integrity verification.

Clock system integrates multiple oscillators: 4–32 MHz external crystal (HSE), 32 kHz LSE for RTC, internal 8 MHz RC with PLL (x6 → 48 MHz), and factory-trimmed 48 MHz HSI48 oscillator synchronized via CRS - enabling precise USB clocking without external crystal.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant ECOPACK®2 packaging.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072RBT6, this part trades USB capability for lower EMI sensitivity and reduced die size; versus STM32F030R8T6, it delivers higher analog integration and richer timer resources essential for complex timing-critical tasks like PWM motor control or IR decoding.

Availability

STM32F071RBT6 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, USB-C power delivery sinks, and building automation nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32F071RBT6 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 integration - optimized for industrial control, appliance HMI, and smart metering.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F071RBT6 achieves 48 MHz maximum CPU frequency using its internal 48 MHz HSI48 oscillator, which is factory-trimmed and automatically synchronized to an external clock source via the Clock Recovery System (CRS). Alternatively, the 8 MHz internal RC oscillator can be multiplied by the PLL (×6) when driven by an external 8 MHz crystal. Both paths meet timing specifications across the full temperature and voltage range (–40°C to +85°C, 2.0–3.6 V).

Does this MCU support hardware cryptographic acceleration?

No, the STM32F071RBT6 does not include dedicated hardware cryptographic accelerators such as AES, SHA, or PKA engines. It relies on software libraries for encryption/decryption operations. For applications requiring hardware-based security, ST's STM32L4 or STM32G0 series with CryptoCell-310 or AES engines should be considered instead.

Can the 12-bit DAC outputs drive external loads directly?

The two 12-bit DAC channels support rail-to-rail output (0–VDDA) with typical output impedance of 15 kΩ and ±1 LSB INL/DNL. They are designed to drive high-impedance inputs (e.g., op-amp inputs or ADC references); direct connection to loads below 5 kΩ will cause gain error and settling time degradation. A unity-gain buffer is recommended for driving cables or low-Z loads.

Is the LQFP64 package RoHS and REACH compliant?

Yes, the STM32F071RBT6 in LQFP64 package is fully RoHS Directive 2011/65/EU compliant and REACH SVHC-free per STMicroelectronics' official product declaration (Doc ID 17195, Rev 12). It uses lead-free matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements for surface-mount assembly.