STMicroelectronics STM32F042F6P6TR

Overview

STM32F042F6P6TR from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller with 32 KB Flash, 6 KB SRAM, crystal-less USB 2.0 Full-Speed interface, CAN 2.0B controller, and integrated 12-bit ADC (1.0 µs conversion). It operates from 2.0–3.6 V and supports industrial temperature range (–40°C to +85°C), targeting embedded control in USB-connected sensor nodes and CAN-based industrial gateways.

For engineers reviewing the STM32F042F6P6TR datasheet, STM32F042F6P6TR pinout, STM32F042F6P6TR application, or STM32F042F6P6TR equivalent, key selection criteria include USB clocking autonomy (48 MHz HSI48 with automatic trimming), 5 V-tolerant I/O count (up to 24 pins), CAN+USB coexistence on single-chip edge devices, and low-power Stop/Standby modes with RTC wakeup.

Technical Context

The device integrates a single-cycle ARM Cortex-M0 core running at up to 48 MHz, coupled with a clock recovery system (CRS) enabling USB FS operation without external crystal. Its memory subsystem includes 32 KB of Flash with error correction and 6 KB of SRAM with hardware parity checking - both mapped into a unified 32-bit address space.

Peripheral interconnect uses APB1/APB2 buses with DMA-driven data movement across UART, SPI, I2C, ADC, and USB endpoints. The advanced-control timer (TIM1) delivers six-channel complementary PWM with dead-time insertion, while the CAN controller supports bit rates up to 1 Mbit/s and message filtering via 14 dedicated mailboxes.

Key Specifications

Pinout & Package

STM32F042F6P6TR is housed in a TSSOP20 package (6.5 × 4.4 mm, 0.65 mm pitch), optimized for compact industrial and consumer modules requiring manual assembly or reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F042K6T6 and STM32F072CBT6, the STM32F042F6P6TR offers optimal cost-performance balance for space-constrained USB+CAN edge nodes where TSSOP20 assembly and minimal BOM are prioritized over peripheral headroom.

Availability

STM32F042F6P6TR is available at Aetrix Electronics and suitable for USB-connected sensor nodes, industrial CAN gateways, smart lighting controls, and portable medical sensors requiring stable component supply across multi-year production cycles.

Supply support for STM32F042F6P6TR 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-grade components since 1987.

The STM32F0 series targets cost-sensitive, resource-efficient embedded applications - emphasizing ultra-low-power operation, USB/CAN integration, and rapid time-to-market for industrial, consumer, and appliance control systems.

FAQ

Does STM32F042F6P6TR support USB device mode without an external crystal?

Yes. It features an internal 48 MHz HSI48 oscillator with automatic trimming synchronized to USB Start-of-Frame (SOF) packets, enabling full-speed USB device operation without any external crystal or oscillator - validated per USB-IF compliance tests in ST's reference design AN4879.

What is the maximum operating frequency of the CAN peripheral?

The CAN controller supports bit rates up to 1 Mbit/s under standard conditions (dominant/recessive transition times ≤ 250 ns, propagation delay ≤ 500 ns). This is achievable with proper PCB layout, termination, and transceiver selection - confirmed in Section 3.18 and Table 60 of the datasheet.

How many I/O pins are 5 V tolerant on this device?

Up to 24 I/O pins are 5 V tolerant (as specified in Section 3.7 and Table 50), including PA0–PA9, PB0–PB9, and PF0–PF1. These tolerate 5 V even when VDD is as low as 2.0 V - verified per IEC 61000-4-2 ESD testing and electrical characteristics tables.

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

Yes. The integrated temperature sensor is factory-calibrated (slope = −1.63 mV/°C, offset = 760 mV at 25°C) and accessible via ADC channel 16. Accuracy is ±10°C over –40°C to +85°C (Table 57), sufficient for fan speed control or overtemperature warning in industrial enclosures.