STM32F051K4T6TR

STM32F051K4T6TR by STMicroelectronics: 32-bit Cortex-M0 MCU, 16KB Flash, LQFP-32 (Tape & Reel)

The STMicroelectronics STM32F051K4T6TR is a cost-effective 32-bit microcontroller tailored for mainstream embedded control. Built on the ARM Cortex-M0 core and packaged in a compact LQFP-32 for space-conscious designs, it balances essential performance (up to 48 MHz) with a practical peripheral mix—12-bit ADC, general-purpose timers with watchdog, and standard serial interfaces (I2C, SPI, USART). This ordering code ships in tape-and-reel, aligning with automated SMT assembly workflows.

If you need a dependable, low-power MCU for industrial and general embedded systems, the STM32F051K4T6TR offers a straightforward path to production with a mature toolchain and broad ecosystem support for Cortex-M0 devices.

Overview

• Brand/Manufacturer: STMicroelectronics
• Series: STM32F0
• MPN: STM32F051K4T6TR
• Category: Microcontrollers (MCU)
• CPU Core: ARM Cortex-M0
• Program Memory: 16 KB Flash
• Package: LQFP-32
• Packaging: Tape & Reel (TR)
• Mounting Type: Surface Mount
• Pin Count: 32

This device integrates a 32-bit core, non-volatile memory, mixed-signal capability via a 12-bit ADC, and common serial connectivity. It is designed to deliver reliable control in cost-sensitive designs without incurring the overhead of higher-end cores.

Key Specifications

• Core architecture: ARM Cortex-M0 (32-bit)
• Maximum operating frequency: Up to 48 MHz
• Flash memory: 16 KB
• Analog: 12-bit ADC
• Timers: General-purpose timers; watchdog
• Interfaces: I2C, SPI, USART
• Debug interface: SWD (Serial Wire Debug)
• Supply voltage (VDD): 2.0 V to 3.6 V
• Operating temperature: -40°C to +85°C (industrial)
• GPIO: Up to 26 I/Os (package dependent)
• Package/case: LQFP-32
• Mounting: Surface Mount
• RoHS status: RoHS Compliant (Pb-free, per manufacturer)
• Lifecycle status: Active (per ST family information)

Items such as SRAM size and detailed peripheral counts are not specified in the provided data. Refer to the official datasheet for definitive electrical characteristics and a complete feature matrix.

Architecture and Peripherals

ARM Cortex-M0 foundation

The STM32F051K4T6TR is based on the ARM Cortex-M0, a 32-bit core optimized for deterministic control and low-power operation. At up to 48 MHz, it comfortably addresses real-time tasks for motor control assistants, simple closed-loop control, sensor aggregation, and communication bridges typical of mainstream embedded projects.

Mixed-signal capability with 12-bit ADC

A 12-bit ADC enables accurate sensor interfacing for voltage, current, temperature, or position feedback. When combined with timers, designers can implement sampling strategies and basic control loops without external converters—useful in industrial sensing and consumer devices that require modest precision.

Timers for control and safety

General-purpose timers support timing, pulse generation, and event measurement, while the watchdog timer adds robustness by recovering the system from unexpected software stalls. These essentials simplify implementing periodic tasks, PWM-like waveforms, and system uptime supervision.

Common serial interfaces

Native I2C, SPI, and USART interfaces cover a broad range of peripheral and communication requirements—from attaching sensors and memory devices to enabling board-to-board links and serial diagnostics. Their presence reduces external glue logic and accelerates board bring-up.

SWD debug for streamlined development

The Serial Wire Debug (SWD) port provides a compact, two-pin debug pathway. It supports download, breakpoints, and basic trace/debug workflows in industry-standard toolchains for ARM Cortex-M0 devices. This shortens iteration cycles during firmware development and test.

Power, Clocking, and Environmental Range

• Supply voltage: 2.0 V to 3.6 V supports operation from common 3.3 V rails and power-conscious designs.
• Frequency: Up to 48 MHz enables responsive control and communication tasks without demanding high-power budgets.
• Temperature range: -40°C to +85°C makes the device suitable for a wide range of industrial and commercial environments.

Specific clock source options, low-power modes, and detailed consumption figures are not specified in the provided data. Consult the datasheet for clock trees, PLL availability, and current consumption per operating mode.

Package, Pinout, and PCB Integration

• Package: LQFP-32 with gull-wing leads for standard SMT processes
• Pin count: 32 pins with up to 26 GPIOs (package dependent)
• Packaging: Tape & Reel (TR) for automated pick-and-place

Design-in considerations:

• Allocate sufficient decoupling at each VDD pin using short, low-impedance return paths.
• Plan for a compact SWD header footprint for programming and debug.
• Reserve clean PCB areas for analog inputs (ADC), with attention to grounding and routing to reduce noise coupling from digital switching.
• Account for I/O drive capabilities and ensure series resistors or protection components where interfaces require them in the end application.
• Validate thermal performance and airflow/derating for the intended ambient temperature envelope (-40°C to +85°C).

Package drawings, land patterns, and pin multiplexing details must be taken from the official datasheet to finalize the PCB footprint and pin assignment.

Applications and Use Cases

The STM32F051K4T6TR addresses mainstream embedded needs where a compact, reliable MCU with essential analog and serial connectivity is required:

• Industrial sensor nodes and data acquisition using the 12-bit ADC
• Small motor/actuator helpers and timing/pulse generation via general-purpose timers
• Communication bridges and protocol adapters using I2C/SPI/USART
• Consumer and appliance controls requiring a cost-sensitive 32-bit MCU
• Basic HMIs, user-interface controllers, and system supervisors

These examples leverage only the capabilities stated in the provided data (Cortex-M0 core, 12-bit ADC, timers, I2C/SPI/USART). For specialized domains (e.g., advanced motor control, complex connectivity stacks), verify feature sufficiency in the datasheet.

Lifecycle, Availability, and Compliance

• Lifecycle status: Active (per STMicroelectronics product family information)
• RoHS: Compliant; Pb-free per manufacturer
• Inventory note: Current inventory quantity provided here is 0; check authorized distributors or STMicroelectronics channels for real-time stock.

For procurement:

• Use the full ordering code STM32F051K4T6TR to ensure LQFP-32 package and tape-and-reel packaging.
• Pricing varies by volume and channel; consult authorized distributors.
• Where continuity is critical, plan for second-source stocking within the same family or footprint-compatible alternatives after verifying pinout and electrical compatibility in the datasheet.

Migration and Scalability

Within the STM32F0 series, STMicroelectronics offers multiple variants that differ by Flash size, peripheral mix, and package options. If you anticipate feature growth or memory headroom needs, consult ST’s parametric tools and the STM32F0 family documentation to identify pin-compatible or software-compatible options. Specific replacements or exact pin-compatibility paths are not specified in the provided data and must be verified against the official datasheet and reference manuals.

Design-In Checklist

• Confirm supply voltage budget: 2.0 V to 3.6 V
• Validate maximum frequency needs against the 48 MHz ceiling
• Size Flash requirements: 16 KB for application code and libraries
• Map peripheral usage: 12-bit ADC channels, general-purpose timers, watchdog
• Plan serial connections: I2C, SPI, and/or USART pin assignments
• Allocate GPIO: Up to 26 I/Os (package dependent) and multiplexer constraints
• Provide SWD access: debug header and programming pads
• Layout for signal integrity: decoupling, ground returns, and analog routing for ADC inputs
• Thermal and environmental validation: -40°C to +85°C operation
• Manufacturing: LQFP-32 footprint, paste mask, and keepouts; Tape & Reel handling in SMT

Where additional requirements arise (e.g., precise timing, low-power sleep modes, EMC), consult the datasheet for configuration limits and recommended operating conditions.

Specifications Summary

• Manufacturer: STMicroelectronics
• Series: STM32F0
• MPN: STM32F051K4T6TR
• Core: ARM Cortex-M0 (32-bit)
• Max frequency: Up to 48 MHz
• Flash: 16 KB
• ADC: 12-bit
• Timers: General-purpose; watchdog
• Interfaces: I2C, SPI, USART
• Debug: SWD (Serial Wire Debug)
• Supply: 2.0 V to 3.6 V
• Operating temperature: -40°C to +85°C
• GPIO: Up to 26 I/Os (package dependent)
• Package: LQFP-32
• Packaging: Tape & Reel (TR)
• Mounting: Surface Mount
• Lifecycle: Active
• Compliance: RoHS Compliant (Pb-free per manufacturer)

Not specified in provided data (consult datasheet): SRAM size, peripheral instance counts, detailed electrical characteristics (consumption, IO drive, ADC sampling rates), and clock source details.

Frequently Asked Questions (FAQs)

• Q: What package is STM32F051K4T6TR supplied in?
  A: LQFP-32 package; this specific ordering code is supplied in tape-and-reel (TR).

• Q: What is the program memory size?
  A: 16 KB Flash memory.

• Q: What is the CPU core and maximum frequency?
  A: ARM Cortex-M0 core, up to 48 MHz (per provided family information).

• Q: Is SWD debugging supported?
  A: Yes. The device provides a Serial Wire Debug (SWD) interface.

• Q: What is the operating voltage range?
  A: 2.0 V to 3.6 V.

• Q: What is the operating temperature range?
  A: -40°C to +85°C (industrial).

• Q: How many GPIO pins are available?
  A: Up to 26 GPIOs, package dependent.

• Q: Is the device RoHS compliant?
  A: Yes, RoHS compliant and Pb-free per manufacturer.

• Q: Are there pin- or software-compatible alternatives?
  A: Specific replacements are not provided here. Consult the STM32F0 family documentation and ST parametric tools for potential pin-compatible or software-compatible options and verify against the datasheet.

Resources

• Product page: https://www.st.com/en/microcontrollers-microprocessors/stm32f051k4.html
• Datasheet: https://www.st.com/resource/en/datasheet/stm32f051x4.pdf

Notes: Some electrical and peripheral details may vary by exact sub-variant; consult the official datasheet for definitive specifications and design limits.