STMicroelectronics STM32F048C6U6

Overview

STM32F048C6U6 from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 32 KB Flash, 6 KB SRAM (HW parity), crystal-less USB 2.0 FS interface, and 48 MHz max CPU frequency. It integrates a 12-bit 1.0 µs ADC (10 channels), nine timers including one 16-bit advanced-control timer, and supports capacitive touch sensing (up to 13 channels) for human-machine interface applications in industrial control panels.

For engineers reviewing the STM32F048C6U6 datasheet, STM32F048C6U6 pinout, STM32F048C6U6 application, or STM32F048C6U6 equivalent, key selection criteria include USB FS operation without external crystal, 5 V-tolerant I/O count (up to 24), internal 48 MHz oscillator with automatic trimming, low-power Stop mode with RTC wakeup, and UFQFPN48 package compatibility with space-constrained embedded designs.

Technical Context

The STM32F048C6U6 implements a single-cycle ARM Cortex-M0 core with NVIC supporting up to 32 interrupts, and features a clock recovery system (CRS) enabling precise USB timing synchronization using the internal 48 MHz HSI48 oscillator. Its memory subsystem includes 32 KB of Flash with error correction logic and 6 KB of SRAM with hardware parity checking for safety-critical operation.

Power architecture separates digital (VDD = 1.8 V ±8%), analog (VDDA = 2.4–3.6 V), and I/O supply domains (VDDIO2 = 1.65–3.6 V), enabling mixed-voltage interfacing and robust noise isolation. The device supports four low-power modes-Sleep, Stop, Standby, and Shutdown-with RTC and backup registers retained in Stop mode via VBAT.

Key Specifications

Pinout & Package

STM32F048C6U6 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package with 0.5 mm pitch, 7 × 7 mm body, and exposed thermal pad for enhanced thermal dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072CBT6, the STM32F048C6U6 trades Flash/SRAM capacity for crystal-less USB integration and lower system cost; versus STM32F030F4P6, it delivers significantly higher integration (USB, TSC, RTC, 24× 5 V-tolerant I/O) at modest BOM increase - making it optimal for USB-connected HMI and sensor edge nodes.

Availability

STM32F048C6U6 is available at Aetrix Electronics and suitable for industrial HMI panels, USB sensor nodes, motor control gateways, and smart power outlets requiring stable component supply and long-term production support.

Supply support for STM32F048C6U6 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, low-power embedded applications requiring high integration and ease of certification; the F048 variant specifically emphasizes USB connectivity and capacitive touch in compact packages for next-generation HMI and IoT edge nodes.

FAQ

Does STM32F048C6U6 require an external crystal for USB operation?

No. The device integrates an internal 48 MHz HSI48 oscillator with Clock Recovery System (CRS) that automatically trims against the USB SOF signal, achieving ±0.25% accuracy - eliminating need for external crystal while maintaining full USB 2.0 Full-Speed compliance.

What is the maximum operating temperature range for STM32F048C6U6?

The STM32F048C6U6 is qualified for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 6.3.1 of the datasheet (DocID026007 Rev 6), under "General operating conditions", and applies to all package variants including UFQFPN48.

How many I/O pins support 5 V tolerance, and which ports are they on?

Up to 24 I/O pins are 5 V tolerant. These are distributed across GPIO ports A, B, and F - specifically PA0–PA15, PB0–PB1, PB10–PB11, and PF0–PF1, as defined in Table 12 ("STM32F048x6 pin definitions") and Section 3.7 of the datasheet.

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

Yes. The integrated temperature sensor is calibrated at two points (25 °C and 110 °C) and provides output referenced to VREFINT (1.22 V). Accuracy is ±1.5 °C over 0–85 °C per Table 55, enabling reliable ambient temperature estimation for thermal throttling or fan control in enclosed systems.