STMicroelectronics STM32F042F6P7TR

Overview

STM32F042F6P7TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 32 KB Flash, 6 KB SRAM, crystal-less USB 2.0 Full-Speed interface, CAN 2.0B controller, and 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 automotive body electronics.

For engineers reviewing the STM32F042F6P7TR datasheet, STM32F042F6P7TR pinout, STM32F042F6P7TR application, or STM32F042F6P7TR equivalent, key selection criteria include USB FS timing autonomy (48 MHz internal oscillator with automatic trimming), CAN bus integration without external transceiver biasing, 5 V-tolerant GPIO count (up to 24 pins), and low-power Stop/Standby modes with RTC wakeup capability.

Technical Context

The device integrates a single-cycle ARM Cortex-M0 core running at up to 48 MHz, supported by a multi-source clock system including HSI48 (with CRS-based USB synchronization), 32 kHz LSE for RTC, and PLL for CPU/system clock derivation. Memory subsystem includes Flash with ECC-like error detection and SRAM with hardware parity checking.

Peripheral architecture features tightly coupled DMA (5 channels), nested vectored interrupt controller (NVIC) with 32 interrupt lines, and dual-domain I/O structure-24 pins support 5 V tolerance while 8 pins accept independent VDDIO2 supply (1.65–3.6 V)-enabling mixed-voltage interfacing in industrial I/O modules.

Key Specifications

Pinout & Package

STM32F042F6P7TR uses the TSSOP20 package (6.5 × 4.4 mm, 0.65 mm pitch), optimized for compact industrial control modules and USB peripheral dongles 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, the STM32F042F6P7TR offers superior space efficiency and lower assembly cost in TSSOP20, while STM32F070F6P6 sacrifices CAN and USB FS capability to reduce unit price - making the F6P7TR the optimal balance of integration, size, and automotive-grade connectivity.

Availability

STM32F042F6P7TR is available at Aetrix Electronics and suitable for USB peripheral development, automotive body electronics, and industrial sensor node production requiring stable component supply across long-lifecycle programs.

Supply support for STM32F042F6P7TR 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 ICs, sensors, and automotive-grade components since 1987.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high integration, low power, and industrial reliability - with the F042 variant specifically engineered for USB-CAN convergence in compact form factors.

FAQ

Does STM32F042F6P7TR support USB device enumeration without an external crystal?

Yes. The part integrates an internal 48 MHz HSI48 oscillator with Clock Recovery System (CRS) that synchronizes to USB Start-of-Frame (SOF) tokens, achieving ±0.25% frequency accuracy required for Full-Speed USB device operation - eliminating need for external crystal or trim capacitor.

What is the maximum operating frequency of the CAN peripheral?

The integrated CAN 2.0B controller supports bit rates up to 1 Mbps at the APB1 clock frequency of 48 MHz. Its timing registers allow precise configuration of propagation, phase, and sync segments to meet ISO 11898-1 timing requirements across cable lengths up to 40 meters.

Can the 5 V-tolerant GPIOs drive 5 V logic directly?

Yes - up to 24 pins (including PA0–PA15, PB0–PB15, PF0–PF1) tolerate 5 V inputs regardless of VDD level (2.0–3.6 V). However, output voltage is clamped to VDD; to drive 5 V loads, external level-shifting circuitry or open-drain configurations with pull-up to 5 V are required.

Is the TSSOP20 package RoHS-compliant and lead-free?

Yes. STM32F042F6P7TR carries ECOPACK®2 certification, confirming compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The package uses lead-free matte tin terminations and halogen-free molding compound, meeting IPC-J-STD-609A Class 1 requirements.