STMicroelectronics STM32C031C4T6

Overview

STM32C031C4T6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 32 KB flash, 12 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC (0.4 µs conversion), and dual USARTs supporting LIN/IrDA/ISO7816 - deployed in industrial sensor nodes and smart metering front-ends requiring low-power operation across -40°C to 125°C.

For engineers reviewing the STM32C031C4T6 datasheet, STM32C031C4T6 pinout, STM32C031C4T6 application, or STM32C031C4T6 equivalent, key selection criteria include its 5 V-tolerant I/Os, hardware parity-checked SRAM, programmable brownout reset, 45 fast GPIOs, and integrated RTC with alarm - all within LQFP48 package constraints.

Technical Context

The STM32C031C4T6 integrates an Arm Cortex-M0+ core with MPU, supporting deterministic real-time execution up to 48 MHz. It features three clock sources: 4–48 MHz HSE crystal oscillator, 32 kHz LSE with calibration, and ±1% internal 48 MHz HSI48 RC oscillator - enabling flexible clock tree configuration for low-latency peripheral triggering and precise timing control.

Its analog subsystem includes a 12-bit ADC with up to 19 external channels, temperature sensor, and VREFINT reference - all operating over full 0–3.6 V supply range. Power management supports four low-power modes (Sleep, Stop, Standby, Shutdown) with wake-up from Stop via I²C or USART, and BOR threshold programmability for robust brownout handling.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in compact industrial PCB layouts and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031F8P6 and STM32C011F4U6, the STM32C031C4T6 uniquely balances LQFP48 expandability, calendar RTC, and 125°C operation - making it optimal for industrial and automotive edge nodes needing long-term reliability and time-aware functionality.

Availability

STM32C031C4T6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering front-ends, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32C031C4T6 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, specializing in microcontrollers, power management, and sensing technologies for industrial, automotive, and consumer markets.

The STM32C0 series targets cost-sensitive, high-volume embedded applications demanding robustness, low power, and simplified certification - particularly in smart grid infrastructure and entry-level automotive ECUs.

FAQ

Does STM32C031C4T6 support USB connectivity?

No. The STM32C031C4T6 does not integrate a USB peripheral. Its communication interfaces are limited to two USARTs, one I²C (Fast-mode Plus), one SPI, and optional SPI emulation over USART. USB functionality requires external PHY or migration to STM32G0 or STM32F0 series with built-in USB FS.

What is the maximum allowed VDD voltage for STM32C031C4T6?

The absolute maximum VDD rating is 3.6 V, with recommended operating range of 2.0 V to 3.6 V. Exceeding 3.6 V risks permanent damage to the I/O structures and flash memory. For 5 V system interfacing, only the 5 V-tolerant I/Os may accept 5 V inputs - VDD itself must remain ≤3.6 V.

Can the internal 48 MHz RC oscillator be used for USB or audio timing?

No. The internal 48 MHz HSI48 oscillator has ±1% accuracy at 25°C - insufficient for USB full-speed (±0.25%) or I²S audio clocking. It is suitable for general-purpose timing, UART baud generation with auto-baud detection, and non-critical PWM. External crystal or MEMS oscillator required for USB/audio-grade precision.

Is STM32C031C4T6 pin-compatible with other STM32C031 variants?

Yes, within same package type: STM32C031C4T6 (LQFP48) shares identical pinout with STM32C031C6T6 and STM32C031K6T6. However, pin compatibility does not extend across packages (e.g., LQFP48 vs. UFQFPN28) or memory variants (x4 vs. x6) due to differing peripheral mappings and feature sets.