STMicroelectronics STM32F031K6T7TR

Overview

STM32F031K6T7TR from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller with 32 KB Flash, 4 KB SRAM (with hardware parity), 48 MHz max CPU frequency, 12-bit 1.0 µs ADC (10-channel), and integrated RTC with alarm. It operates across -40 to +105°C and supports 2.0–3.6 V supply, targeting compact industrial control and sensor node applications.

For engineers reviewing the STM32F031K6T7TR datasheet, STM32F031K6T7TR pinout, STM32F031K6T7TR application, or STM32F031K6T7TR equivalent, key selection criteria include its TSSOP20 package footprint, 5 V-tolerant I/O count (up to 26 pins), low-power Stop/Standby modes with RTC wakeup, and integrated communication interfaces (I²C Fast Mode Plus, USART with LIN/IrDA, SPI at 18 Mbit/s).

Technical Context

The STM32F031K6T7TR implements a single-cycle ARM Cortex-M0 core with NVIC for deterministic interrupt handling and supports boot from system memory, SRAM, or main Flash. Its clock tree integrates multiple oscillators: 4–32 MHz HSE, 32 kHz LSE for RTC, 8 MHz HSI with PLL (×6), and 40 kHz LSI for watchdog timing.

Peripheral integration includes a 5-channel DMA controller, advanced-control timer (TIM1) with deadtime generation and emergency stop, four general-purpose 16-bit timers (including IR modulation support), and a 12-bit ADC with separate analog supply (2.4–3.6 V) and internal temperature sensor/VREFINT calibration.

Key Specifications

Pinout & Package

STM32F031K6T7TR uses a 20-pin TSSOP package (6.5 × 4.4 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts while maintaining hand-solderability and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031K6T7TR, the STM32F030F4P6 sacrifices safety features (no SRAM parity, no RTC) for lower cost, while the STM32F042F4P6 adds USB at the expense of design complexity - making the K6T7TR optimal for balanced industrial control requiring reliability, low power, and proven peripheral integration.

Availability

STM32F031K6T7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and home appliance UI controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F031K6T7TR 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, and automotive-grade ICs with strong industrial and automotive certification heritage.

The STM32F0 series targets cost-sensitive, high-volume embedded applications demanding Cortex-M0 efficiency, robust peripheral integration, and extended temperature operation - ideal for white goods, lighting, and industrial automation.

FAQ

What is the maximum operating frequency and supported clock sources?

The STM32F031K6T7TR runs at up to 48 MHz using its internal 8 MHz HSI oscillator with PLL (×6), an external 4–32 MHz crystal (HSE), or the 32 kHz LSE for RTC. The HSI is factory-trimmed to ±1% accuracy, and the PLL supports jitter-free system clock derivation without external components.

Does this MCU support hardware-based CRC and memory protection?

Yes - it includes a dedicated CRC calculation unit supporting CRC-32 with programmable polynomial and initial value, and 4 KB SRAM with hardware parity checking that triggers a HardFault on error detection. These features enable certified functional safety compliance (IEC 61508 SIL2) without software overhead.

How many I/O pins are 5 V tolerant, and which ones are they?

Up to 26 I/Os are 5 V tolerant, including all pins in GPIOA and GPIOB except NRST, BOOT0, and VDDA-related pins. In the TSSOP20 package (STM32F031K6T7TR), PA0–PA7, PA9–PA10, PA13–PA14, PB0–PB1, and PB6–PB7 are 5 V tolerant - confirmed per Table 11 (Pin Definitions) and Section 6.3.14 (I/O port characteristics) of the datasheet.

Can the RTC maintain time during Standby mode with VBAT supplied?

Yes - when VBAT is connected (e.g., to a coin cell), the RTC and 32 backup registers retain state and continue counting in Standby mode. The LSE oscillator (32.768 kHz) remains active, and the RTC alarm can wake the MCU. VBAT monitoring is also supported via dedicated ADC channel (VBAT/2) for battery health reporting.