STMicroelectronics STM32F051K6T6

Overview

STM32F051K6T6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 32 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, integrated 12-bit ADC and DAC, and dual USART/I²C/SPI interfaces - deployed in industrial sensor nodes, motor control modules, and smart metering front-ends.

For engineers reviewing the STM32F051K6T6 datasheet, STM32F051K6T6 pinout, STM32F051K6T6 application, or STM32F051K6T6 equivalent, key selection criteria include 5 V-tolerant I/O count (up to 36), 16-bit advanced-control timer with deadtime generation, RTC with alarm and wakeup from Stop/Standby, HDMI CEC interface, and SWD debug support.

Technical Context

The STM32F051K6T6 implements an ARM Cortex-M0 core with Harvard bus architecture, supporting Thumb-2 instruction set and NVIC with 32 interrupt lines. It integrates a programmable voltage detector (PVD), hardware CRC unit, and memory protection unit (MPU) for secure boot and runtime integrity checks.

Clock management includes dual oscillators (4–32 MHz HSE + 32 kHz LSE), internal 8 MHz RC with x6 PLL, and 40 kHz LSI - enabling precise timing for RTC, PWM generation, and synchronous communication. Power domains separate VDD (2.0–3.6 V) and VDDA (2.4–3.6 V) to maintain ADC/DAC accuracy under mixed-signal operation.

Key Specifications

Pinout & Package

STM32F051K6T6 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32-pin layout optimized for space-constrained industrial and consumer applications. Pin functions are validated per STMicroelectronics DocID022265 Rev 7, Section 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051K6T6 uniquely combines DAC, CEC, and advanced PWM timers in a 32-pin package - making it optimal for mixed-signal control with human interface and home automation features.

Availability

STM32F051K6T6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, and energy meter front-ends requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM32F051K6T6 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 automotive-grade components since 1987.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring ARM Cortex-M0 performance, robust analog integration, and industrial-grade reliability - especially where low power, small footprint, and peripheral richness matter.

FAQ

What is the maximum operating temperature range for STM32F051K6T6?

The STM32F051K6T6 is rated for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 6.3.1 of the datasheet (DocID022265 Rev 7), with thermal derating applied above 70 °C ambient for sustained 48 MHz operation. Junction temperature must not exceed 125 °C under any condition.

Does STM32F051K6T6 support in-application programming (IAP)?

Yes - the device supports IAP via its system memory bootloader (activated by BOOT0 = 1) or user Flash-based routines. The 32 KB Flash is organized into 128-byte pages, and erase/write operations can be performed while executing from RAM or other Flash sectors, enabling field firmware updates without external programmer.

Can the internal 8 MHz RC oscillator be used as the system clock source without external crystals?

Yes - the internal 8 MHz RC oscillator (HSI) is factory-trimmed to ±1% accuracy and can serve as the main system clock. It supports PLL multiplication (x6 → 48 MHz) and is usable for all peripherals except USB (not present) and high-precision RTC; however, for <±0.1% timing accuracy (e.g., UART baud rate stability), an external crystal is recommended.

How many I/O pins support external interrupt capability?

All 25 general-purpose I/O pins (PA0–PA15, PB0–PB1, PB10–PB15) are mappable to external interrupt vectors via the EXTI controller. Each pin can generate rising/falling/both-edge interrupts independently, and up to 16 EXTI lines are directly connected to GPIO ports - enabling wake-from-Stop on any active edge.