STMicroelectronics STM32F031K6T6TR

Overview

STM32F031K6T6TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller operating up to 48 MHz, featuring 32 KB Flash, 4 KB SRAM with hardware parity, a 12-bit 1.0 µs ADC (10-channel), and integrated peripherals including I²C (Fast Mode Plus), USART (LIN/IrDA/ISO7816), SPI (18 Mbit/s), RTC with alarm, and nine timers - deployed in industrial sensor nodes, motor control interfaces, and smart metering front-ends.

For engineers reviewing the STM32F031K6T6TR datasheet, STM32F031K6T6TR pinout, STM32F031K6T6TR application, or STM32F031K6T6TR equivalent, key selection criteria include its 48 MHz Cortex-M0 core, 5 V-tolerant I/O capability on up to 26 pins, 2.0–3.6 V supply range, -40°C to +105°C extended temperature rating, and TSSOP20 package compatibility with space-constrained PCB layouts.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, coupled with a flexible clock tree supporting multiple sources: 4–32 MHz HSE crystal, 32 kHz LSE for RTC, 8 MHz HSI with x6 PLL, and 40 kHz LSI. Power management includes POR/PDR, programmable voltage detector (PVD), and three low-power modes (Sleep, Stop, Standby) with RTC and backup register retention via VBAT.

Peripherals are tightly integrated via AHB/APB buses: five-channel DMA supports memory-to-peripheral transfers; GPIOs support external interrupt mapping and 5 V tolerance; the 12-bit ADC operates across 0–3.6 V with separate VDDA supply (2.4–3.6 V); and advanced timer TIM1 delivers six-channel PWM with deadtime insertion and emergency stop - critical for brushless DC motor gate driving.

Key Specifications

Pinout & Package

TSSOP20 package (6.5 × 4.4 mm, 0.65 mm pitch), RoHS-compliant and ECOPACK®2 certified, optimized for automated assembly and thermal performance in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031K6T6TR, STM32F030F4P6 lacks RTC and advanced PWM capabilities but reduces BOM cost; STM32F042F4P6 adds USB at comparable price but trades off some I/O count - both require PCB redesign due to different pinouts and peripheral mappings.

Availability

STM32F031K6T6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor control interfaces, and smart electricity meter front-ends requiring stable component supply, long-term lifecycle assurance, and extended temperature compliance.

Supply support for STM32F031K6T6TR 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 management ICs, MEMS, and analog products for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring ARM Cortex-M0 performance, robust peripheral integration, and industrial-grade reliability - optimized for rapid development with STM32CubeMX and HAL libraries.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F031K6T6TR achieves 48 MHz via its internal 8 MHz HSI oscillator multiplied by a 6× PLL, or directly from an external 4–32 MHz crystal oscillator. The PLL output feeds the system clock (SYSCLK), and all APB/AHB peripherals derive clocks from this source with configurable prescalers. No external clock source is required for full-speed operation.

Does this MCU support hardware encryption or secure boot?

No, the STM32F031K6T6TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot features. It lacks a true random number generator, tamper detection, or embedded secure memory. Security relies on software-based measures and external trusted platform modules - consistent with its entry-level positioning in the STM32F0 family.

Can the ADC measure signals beyond the VDDA supply range?

No - the ADC input voltage range is strictly 0 V to VDDA, with VDDA specified between 2.4 V and 3.6 V. Applying voltages exceeding VDDA risks damage or invalid conversions. For signals above VDDA, external signal conditioning (e.g., resistor divider, op-amp scaling) is mandatory to ensure input stays within the absolute maximum rating of -0.3 V to VDDA + 0.3 V.

Is the TSSOP20 package pin-compatible with other STM32F031 variants?

No - the TSSOP20 package (used in STM32F031K6T6TR) has a unique 20-pin layout distinct from LQFP32, UFQFPN28, or WLCSP25 variants. Pin functions differ significantly across packages; for example, NRST and BOOT0 positions vary, and advanced timer channels are not fully mapped in TSSOP20. Migration requires full schematic and layout revision.