STM32F031K4U6 - 48MHz Cortex-M0 16KB MCU | STMicroelectronics
MPN： STM32F031K4U6 ✓ 啟用中STM32F031K4U6 概覽
A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals on one device. The STM32F031K4U6 belongs to the hierarchy MCU -> embedded microcontroller -> ARM Cortex-M0 microcontroller -> STM32F0 series. Its Cortex-M0 architecture provides a 32-bit RISC processing environment while supporting peripherals commonly required for embedded products, including LIN, timers, PWM, SPI, UART/USART, I2C, IrDA, DMA, I2S, POR, and watchdog functions.
The principal feature set includes a 48 MHz maximum operating frequency, 16 KB Flash program memory, a 32-pin compact package, and up to 27 I/O pins. The Flash-oriented organization of 16K x 8 supports embedded firmware storage, while the 5 x 5 mm UFQFPN package is suitable for space-constrained assemblies. Available sourcing information identifies this exact ordering code as a 2.5 V or 3.3 V device.
The STM32F031K4U6 combines a general-purpose Cortex-M0 core with serial communication and timing resources suited to real-time control. Its reported peripherals include I2C, IrDA, LINbus, SPI, UART/USART, DMA, I2S, POR, PWM, and WDT. These interfaces allow the MCU to connect sensors, actuators, human-interface devices, communications transceivers, and audio converters without requiring several separate interface devices.
Typical uses include compact sensor nodes, industrial control modules, LIN-connected peripherals, communication equipment, motor and actuator controllers, and small consumer products. The 48 MHz processing rate provides additional timing margin for interrupt-driven control and protocol handling, while the 27 available I/O pins support multiple digital connections on a compact board.
Designers should verify the exact exposed-pad connection, decoupling requirements, clock configuration, and peripheral pin assignments against the manufacturer documentation before layout release. The target package is a 32-pin UFQFPN, and the thermal behavior of its exposed pad depends on the PCB copper area, solder mask, and thermal via arrangement. The verified excerpts do not provide the complete pin names, so no pin-level assignments are inferred here.
This product page consolidates verified distributor pricing, package and memory details, sourced drop-in candidates, and practical selection guidance. It distinguishes documented STM32F031K4U6 attributes from compatibility claims that require schematic, firmware, ADC, clock, and low-power validation before production substitution.
直接替換替代品，適用於 STM32F031K4U6 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STM32F031K4U6 （相同外形與佔位） — 差異在於 Flash Memory, Package.
STM32F031K4T6
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32F031K4T7
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32F031K4T6TR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
HK32F031K4U6
✅ 直接替換📋 參考替代品（不在目錄中）
STM32F031K4U6 最大額定值與電氣特性
| Product Type | 32-bit ARM Cortex-M0 microcontroller |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 16 KB (16K x 8) |
| Number of I/O Pins | 27 pins |
| Supply Voltage Options | 2.5 V or 3.3 V |
| 封裝 | 32-pin UFQFPN (5 x 5 mm) |
| Core Architecture | ARM Cortex-M0 32-bit RISC |
| Communications Interfaces | I2C, IrDA, LINbus, SPI, UART/USART |
| Additional Peripherals | DMA, I2S, POR, PWM, WDT |
| 安裝類型 | Surface mount |
| Core Count | 1 core |
STM32F031K4U6 32-pin ufqfpn (5 x 5 mm) 腳位配置指南
STM32F031K4U6（32-pin ufqfpn (5 x 5 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： STM32F031K4U6.
請參閱 資料表 以查看完整腳位配置。
典型應用
STM32F031K4U6 適用於 6 應用s: Compact Sensor Node, LIN-Connected Automotive or Industrial Peripheral, Industrial Control Module, Communication and Protocol Converter, LED Lighting Controller, Small Audio Interface.
Compact Sensor Node
The STM32F031K4U6 fits a compact environmental or industrial sensor node because it combines a 48 MHz ARM Cortex-M0 core with 16 KB Flash and up to 27 I/O pins in a 32-pin UFQFPN package measuring 5 x 5 mm. Its I2C and SPI interfaces can connect suitable sensors, while UART/USART supports a host link or local configuration channel. The small footprint preserves board area for the sensor, protection, and power circuitry. The 16 KB program-memory limit should be checked against the complete firmware image, while the 48 MHz clock provides useful interrupt and sampling-control headroom.
推薦
LIN-Connected Automotive or Industrial Peripheral
The STM32F031K4U6 is appropriate for a small LIN-connected peripheral because the verified peripheral set includes LINbus, UART/USART, timers, PWM, and the watchdog. Its 48 MHz Cortex-M0 core can service communication interrupts and local control functions, while 16 KB Flash stores a focused embedded application. A LIN transceiver handles the physical bus layer, and the MCU handles framing, diagnostics, timing, and actuator commands. The 32-pin 5 x 5 mm UFQFPN also supports compact module layouts, but the exact supply range and automotive qualification of this ordering code must be verified before use in a safety- or automotive-critical environment.
推薦
Industrial Control Module
The STM32F031K4U6 can serve as the central controller in a compact industrial module containing discrete inputs, relay or transistor-driven outputs, and a serial supervisory link. Its 27 I/O pins provide more digital connectivity than a minimal 16-pin MCU, while PWM and timer resources support repetitive control functions. The Cortex-M0 processor operates up to 48 MHz for responsive interrupt handling, and the watchdog supports recovery from unexpected faults. Designers should still budget Flash for communications, diagnostics, and safety checks, and should isolate noisy industrial loads physically and electrically from the compact 5 x 5 mm UFQFPN footprint.
推薦
Communication and Protocol Converter
The STM32F031K4U6 suits a compact protocol-conversion product that must bridge a host UART or USB interface to an SPI or I2C peripheral. Its verified interface mix includes UART/USART, SPI, I2C, IrDA, DMA, and I2S, allowing the firmware to buffer and route data without a higher-complexity processor. At 48 MHz, the MCU can service multiple interrupt-driven endpoints, and the 16 KB Flash constrains it to relatively compact application code. The 32-pin UFQFPN keeps the converter small, although exact DMA-channel availability, peripheral instance mapping, and pin multiplexing must be confirmed in the manufacturer documentation.
推薦
LED Lighting Controller
The STM32F031K4U6 can control compact LED lighting or indicator systems because its verified peripherals include PWM, timers, multiple serial interfaces, and a watchdog. PWM outputs can implement dimming or visual status patterns, while UART/USART or I2C can accept commands from a higher-level controller. The 48 MHz core provides sufficient timing capability for deterministic updates, and the 32-pin UFQFPN allows the controller to fit close to the LED driver circuitry. A 16 KB Flash budget may constrain extensive graphical effects or logging, so the application should use compact firmware and limit stored diagnostic data.
推薦
Small Audio Interface
The STM32F031K4U6 can support a small audio interface because the verified peripheral list includes I2S, DMA, timers, and multiple serial links. I2S can carry digital audio, while DMA can move samples with limited CPU intervention, and the 48 MHz Cortex-M0 core can supervise buffering and configuration. The 16 KB Flash limit favors focused firmware rather than extensive codecs, effects, or file handling. The 32-pin 5 x 5 mm package also reduces board size, but the design must verify the exact I2S instance, DMA routing, clock requirements, and exposed-pad layout in the manufacturer documentation.
推薦
推薦產品摘要
工程參考資料，適用於 STM32F031K4U6 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STM32F031K4T6 | STM32F031K4T7 | STM32F031K4T6TR | HK32F031K4U6 |
|---|---|---|---|---|---|
| Package | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) | 32-pin UFQFPN (5 x 5 mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | C&K Switches |
| CPU Core | ARM Cortex-M0, 32-bit RISC | ARM Cortex-M0, 32-bit RISC | ARM Cortex-M0, 32-bit RISC | ARM Cortex-M0, 32-bit RISC | 32-bit MCU |
| Communication Interfaces | I2C, IrDA, LINbus, SPI, UART/USART | I2C, IrDA, LINbus, SPI, UART/USART | I2C, IrDA, LINbus, SPI, UART/USART | I2C, IrDA, LINbus, SPI, UART/USART | Hardware and software compatibility claimed; detailed peripheral differences require validation |
| Order Code and Packaging | U6 ordering code; tray | T6 temperature-grade ordering code; tray | T7 temperature-grade ordering code; tray | T6 temperature-grade ordering code; tape and reel | U6 ordering code |
主要差異化特點
- Directly documented STMicroelectronics target with a 48 MHz Cortex-M0 core (對比HK32F031K4U6)
- 16 KB Flash configuration with 27 available I/O pins (對比HK32F031K4U6)
- Broad verified peripheral set for compact embedded products (對比HK32F031K4U6)
- Established manufacturer ecosystem and direct ordering evidence (對比HK32F031K4U6)
設計說明
Treat the 32-pin UFQFPN as a thermal and electrical layout task rather than a simple 5 x 5 mm placement. Confirm the exposed-pad connection and land pattern against the current ST package drawing, place input and internal supply decoupling at their assigned pins with the shortest return path, and route high-current or switching-node copper away from the MCU and sensitive analog inputs. Do not copy a generic QFN land pattern without checking pad dimensions and tolerances.
Verify every operating, I/O, and power-supply limit against the STM32F031K4U6 manufacturer documentation before release. The verified excerpts identify 2.5 V and 3.3 V supply options but do not provide minimum and maximum voltage ranges, load-current limits, or internal regulator details. Use the exact documented voltage windows for VDD, VDDA, and any other supply domains, and ensure external components remain within their own ratings during startup and fault conditions.
Do not treat same-pinout compatibility as proof that every peripheral behaves identically. The cross-reference for HK32F031K4U6 specifically identifies ADC, clock, and low-power behavior as areas requiring review and sample testing. For any substitute, compare startup timing, oscillator tolerances, ADC calibration and accuracy, DMA behavior, interrupt latency, sleep currents, watchdog operation, and firmware register assumptions before production approval.
The compact UFQFPN package relies heavily on the PCB for heat removal. Provide copper under the exposed pad, follow the manufacturer land pattern, and use thermal vias where the package documentation permits them. Because the supplied data does not state junction temperature, thermal resistance, or maximum power dissipation, an enclosure-temperature calculation cannot be completed here; obtain those values and measure the assembled board at the highest expected ambient and switching activity.
Assign communication and timing pins only after checking the complete pin multiplexing and alternate-function tables. Keep I2C and other communication routing short, provide the required pull-ups only where the bus specification and device configuration call for them, and keep switching power loops compact. If the MCU drives an external sensor, display, or transceiver, confirm signal levels, rise and fall times, and pin-drive capabilities rather than assuming compatibility from the peripheral name.
合規資訊
The supplied verified excerpts do not explicitly state the target's RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields therefore remain unknown rather than being inferred from the manufacturer or distributor listings.
