STMicroelectronics STM32F048C6U6TR

Overview

STM32F048C6U6TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 32 KB Flash, 6 KB SRAM with hardware parity, and crystal-less USB 2.0 Full-Speed interface operating from the internal 48 MHz oscillator with automatic trimming. It delivers up to 48 MHz CPU frequency, supports 1.8 V ±8% digital supply, and integrates a 12-bit 1.0 µs ADC, nine timers (including one 16-bit advanced-control timer), and capacitive touch sensing-used in USB-powered industrial sensors and embedded HMI controllers.

For engineers reviewing the STM32F048C6U6TR datasheet, STM32F048C6U6TR pinout, STM32F048C6U6TR application, or STM32F048C6U6TR equivalent, key selection criteria include USB FS timing autonomy (no external crystal required), 5 V-tolerant I/O count (up to 24 pins), low-voltage operation down to 1.8 V, and integrated RTC with calendar and alarm-critical for battery-backed metering and portable USB peripherals.

Technical Context

The device implements a fully integrated clock recovery system (CRS) synchronized to USB SOF packets, enabling precise 48 MHz USB clock generation without external crystal. Its power architecture separates VDD (1.8 V digital core), VDDA (2.4–3.6 V analog), and VDDIO2 (1.65–3.6 V for selected I/Os), supporting mixed-voltage system interfacing.

The MCU features a dedicated 5-channel DMA controller with peripheral-to-memory and memory-to-memory transfer capability, and a nested vectored interrupt controller (NVIC) supporting up to 32 interrupt channels-including configurable priority levels and late arrival handling-enabling deterministic real-time response in motor control and sensor fusion applications.

Key Specifications

Pinout & Package

STM32F048C6U6TR is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact USB-enabled designs with thermal efficiency and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F048C6U6TR, STM32F072CBT6 offers greater memory headroom at higher cost and added crystal dependency for RTC accuracy, while STM32F042F6P6 trades I/O count, TSC, and Flash capacity for lower unit price and smaller footprint-making the C6U6TR optimal for balanced USB+touch+RTC applications under 32 KB code size.

Availability

STM32F048C6U6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, USB-powered HMI controllers, smart meter interface modules, and portable diagnostic tools requiring stable component supply, long-term lifecycle assurance, and full production traceability.

Supply support for STM32F048C6U6TR 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, sensors, and automotive ICs-with over 40 years of embedded systems innovation.

The STM32F0 series targets cost-sensitive, energy-efficient applications demanding ARM Cortex-M0 performance, USB connectivity, and analog integration-designed specifically for industrial controls, consumer appliances, and USB-peripheral edge devices.

FAQ

Does STM32F048C6U6TR require an external crystal for USB operation?

No. The device uses its internal 48 MHz HSI48 oscillator with automatic trimming via USB Start-of-Frame (SOF) packets, eliminating the need for an external 12 MHz crystal. This is confirmed in Section 3.18 and Figure 2 of the datasheet (DocID026007 Rev 6), and validated by the "crystal-less USB FS" feature listing on page 1.

What is the maximum operating temperature range for STM32F048C6U6TR?

The STM32F048C6U6TR is rated for industrial temperature range: –40 °C to +85 °C. This is specified in Table 20 (General operating conditions) and Table 68 (Package thermal characteristics) of the datasheet, and aligns with the ECOPACK®2 qualification standard for the UFQFPN48 package.

Can the 12-bit ADC operate independently while the CPU is in Stop mode?

Yes. The ADC can be triggered by autonomous timers (e.g., TIM1/TRGO, TIM2) or EXTI events during Stop mode, with results stored in SRAM. Section 3.10.1 and Table 30 (Low-power mode wakeup timings) confirm ADC conversion completion in <5 µs after wakeup, and Section 6.3.5 specifies ADC functionality retention in Stop mode with VDDA powered.

How many pins support independent VDDIO2 supply, and what is their voltage range?

Eight I/O pins (PA9, PA10, PA13, PA14, PA15, PB0, PB1, PB2) support independent VDDIO2 supply, rated from 1.65 V to 3.6 V. This is explicitly defined in Section 3.7 (GPIOs) and Table 12 (pin definitions) of the datasheet, enabling mixed-voltage interfacing with 1.8 V, 2.5 V, or 3.3 V peripherals without level shifters.