STM32L431RCT6 Microcontroller: Features, Applications and Datasheet
256KB 256K x 8 FLASH ARM® Cortex®-M4 32-Bit Microcontroller STM32L4 Series STM32L431 64 Pin 80MHz 3V 64-LQFP









256KB 256K x 8 FLASH ARM® Cortex®-M4 32-Bit Microcontroller STM32L4 Series STM32L431 64 Pin 80MHz 3V 64-LQFP
The STM32L431RCT6 is an ultra-low-power microcontroller from STMicroelectronics. This article will introduce its features, applications and datasheet.
STM32L431RCT6 Description
The STM32L431RCT6 is an ultra-low-power microcontroller from STMicroelectronics. It is based on the high-performance Arm® Cortex®-M4 32-bit RISC core, which operates at a frequency of up to 80 MHz. The Cortex-M4 core features a Floating point unit (FPU) single precision which supports all Arm® single-precision data-processing instructions and data types.
The STM32L431RCT6 device embeds high-speed memories (Flash memory up to 256 Kbyte, 64 Kbyte of SRAM), a Quad SPI flash memories interface (available on all packages) and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix
STM32L431RCT6 Features
Core: Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 80 MHz. The core features a Floating point unit (FPU) single precision.
Memory: High-speed memories (Flash memory up to 256 Kbyte, 64 Kbyte of SRAM), a Quad SPI flash memories interface.
Peripherals: An extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.
DSP instructions: A full set of DSP instructions and a memory protection unit (MPU) which enhances application security.
Analog: A fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, two DAC channels, an internal voltage reference buffer.
Timers: A low-power RTC, one general-purpose 32-bit timer, one 16-bit PWM timer dedicated to motor control, four general-purpose 16-bit timers, and two 16-bit low-power timers.
Capacitive sensing: Up to 21 capacitive sensing channels.
Communication interfaces: Standard and advanced communication interfaces.
Temperature range: Operates in the -40 to +85 °C (+105 °C junction), -40 to +105 °C (+125 °C junction) and -40 to +125 °C (+130 °C junction) temperature ranges.
Power supply: From a 1.71 to 3.6 V power supply.
Power-saving modes: A comprehensive set of power-saving modes allows the design of low-power applications.
Specifications
- TypeParameter
- Factory Lead Time12 Weeks
- Lifecycle Status
Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.
ACTIVE (Last Updated: 7 months ago) - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
64-LQFP - Surface Mount
having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.
YES - Number of Pins64
- Number of I/Os52
- Data ConvertersA/D 16x12b; D/A 2x12b
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~85°C TA - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tray - Series
In electronic components, the "Series" refers to a group of products that share similar characteristics, designs, or functionalities, often produced by the same manufacturer. These components within a series typically have common specifications but may vary in terms of voltage, power, or packaging to meet different application needs. The series name helps identify and differentiate between various product lines within a manufacturer's catalog.
STM32L4 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
3 (168 Hours) - Number of Terminations64
- Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
QUAD - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
GULL WING - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
NOT SPECIFIED - Supply Voltage
Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.
3V - Terminal Pitch
The center distance from one pole to the next.
0.5mm - Frequency
In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.
80MHz - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
NOT SPECIFIED - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
STM32L431 - Interface
In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.
CAN, I2C, IrDA, LIN, SPI, USART - Memory Size
The memory capacity is the amount of data a device can store at any given time in its memory.
256kB - Oscillator Type
Wien Bridge Oscillator; RC Phase Shift Oscillator; Hartley Oscillator; Voltage Controlled Oscillator; Colpitts Oscillator; Clapp Oscillators; Crystal Oscillators; Armstrong Oscillator.
Internal - RAM Size
RAM size refers to the amount of random access memory (RAM) available in an electronic component, such as a computer or smartphone. RAM is a type of volatile memory that stores data and instructions that are actively being used by the device's processor. The RAM size is typically measured in gigabytes (GB) and determines how much data the device can store and access quickly for processing. A larger RAM size allows for smoother multitasking, faster loading times, and better overall performance of the electronic component. It is an important factor to consider when choosing a device, especially for tasks that require a lot of memory, such as gaming, video editing, or running multiple applications simultaneously.
64K x 8 - Voltage - Supply (Vcc/Vdd)
Voltage - Supply (Vcc/Vdd) is a key parameter in electronic components that specifies the voltage level required for the proper operation of the device. It represents the power supply voltage that needs to be provided to the component for it to function correctly. This parameter is crucial as supplying the component with the correct voltage ensures that it operates within its specified limits and performance characteristics. It is typically expressed in volts (V) and is an essential consideration when designing and using electronic circuits to prevent damage and ensure reliable operation.
1.71V~3.6V - uPs/uCs/Peripheral ICs Type
The parameter "uPs/uCs/Peripheral ICs Type" refers to the classification of various integrated circuits used in electronic devices. It encompasses microprocessors (uPs), microcontrollers (uCs), and peripheral integrated circuits that provide additional functionalities. This classification helps in identifying the specific type of chip used for processing tasks, controlling hardware, or interfacing with other components in a system. Understanding this parameter is essential for selecting the appropriate electronic components for a given application.
MICROCONTROLLER, RISC - Core Processor
The term "Core Processor" typically refers to the central processing unit (CPU) of a computer or electronic device. It is the primary component responsible for executing instructions, performing calculations, and managing data within the system. The core processor is often considered the brain of the device, as it controls the overall operation and functionality. It is crucial for determining the speed and performance capabilities of the device, as well as its ability to handle various tasks and applications efficiently. In modern devices, core processors can have multiple cores, allowing for parallel processing and improved multitasking capabilities.
ARM® Cortex®-M4 - Peripherals
In the context of electronic components, "Peripherals" refer to devices or components that are connected to a main system or device to enhance its functionality or provide additional features. These peripherals can include input devices such as keyboards, mice, and touchscreens, as well as output devices like monitors, printers, and speakers. Other examples of peripherals include external storage devices, network adapters, and cameras. Essentially, peripherals are external devices that expand the capabilities of a main electronic system or device.
Brown-out Detect/Reset, DMA, PWM, WDT - Program Memory Type
Program memory typically refers to flash memory when it is used to hold the program (instructions). Program memory may also refer to a hard drive or solid state drive (SSD). Contrast with data memory.
FLASH - Core Size
Core size in electronic components refers to the physical dimensions of the core material used in devices such as inductors and transformers. The core size directly impacts the performance characteristics of the component, including its inductance, saturation current, and frequency response. A larger core size typically allows for higher power handling capabilities and lower core losses, while a smaller core size may result in a more compact design but with limitations on power handling and efficiency. Designers must carefully select the core size based on the specific requirements of the application to achieve optimal performance and efficiency.
32-Bit - Program Memory Size
Program Memory Size refers to the amount of memory available in an electronic component, such as a microcontroller or microprocessor, that is used to store program instructions. This memory is non-volatile, meaning that the data stored in it is retained even when the power is turned off. The program memory size determines the maximum amount of code that can be stored and executed by the electronic component. It is an important parameter to consider when selecting a component for a specific application, as insufficient program memory size may limit the functionality or performance of the device.
256KB 256K x 8 - Connectivity
In electronic components, "Connectivity" refers to the ability of a component to establish and maintain connections with other components or devices within a circuit. It is a crucial parameter that determines how easily signals can be transmitted between different parts of a circuit. Connectivity can be influenced by factors such as the number of input and output ports, the type of connectors used, and the overall design of the component. Components with good connectivity are essential for ensuring reliable and efficient operation of electronic systems.
CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART - Bit Size
In electronic components, "Bit Size" refers to the number of bits that can be processed or stored by a particular component. A bit is the smallest unit of data in computing and can have a value of either 0 or 1. The Bit Size parameter is commonly used to describe the capacity or performance of components such as microprocessors, memory modules, and data buses. A larger Bit Size generally indicates a higher processing capability or storage capacity, allowing for more complex operations and larger amounts of data to be handled efficiently. It is an important specification to consider when selecting electronic components for specific applications that require certain levels of performance and data processing capabilities.
32 - Has ADC
Has ADC refers to the presence of an Analog-to-Digital Converter (ADC) in an electronic component. An ADC is a crucial component in many electronic devices as it converts analog signals, such as voltage or current, into digital data that can be processed by a digital system. Having an ADC allows the electronic component to interface with analog signals and convert them into a format that can be manipulated and analyzed digitally. This parameter is important for applications where analog signals need to be converted into digital form for further processing or control.
YES - DMA Channels
DMA (Direct Memory Access) Channels are a feature found in electronic components such as microcontrollers, microprocessors, and peripheral devices. DMA Channels allow data to be transferred directly between peripherals and memory without involving the CPU, thereby reducing the burden on the CPU and improving overall system performance. Each DMA Channel is typically assigned to a specific peripheral device or memory region, enabling efficient data transfer operations. The number of DMA Channels available in a system determines the concurrent data transfer capabilities and can vary depending on the specific hardware design. Overall, DMA Channels play a crucial role in optimizing data transfer efficiency and system performance in electronic devices.
YES - Data Bus Width
The data bus width in electronic components refers to the number of bits that can be transferred simultaneously between the processor and memory. It determines the amount of data that can be processed and transferred in a single operation. A wider data bus allows for faster data transfer speeds and improved overall performance of the electronic device. Common data bus widths include 8-bit, 16-bit, 32-bit, and 64-bit, with higher numbers indicating a larger capacity for data transfer. The data bus width is an important specification to consider when evaluating the speed and efficiency of a computer system or other electronic device.
32b - Number of Timers/Counters8
- Number of A/D Converters1
- Number of UART Channels4
- Number of ADC Channels16
- Max Junction Temperature (Tj)
Max Junction Temperature (Tj) refers to the maximum allowable temperature at the junction of a semiconductor device, such as a transistor or integrated circuit. It is a critical parameter that influences the performance, reliability, and lifespan of the component. Exceeding this temperature can lead to thermal runaway, breakdown, or permanent damage to the device. Proper thermal management is essential to ensure the junction temperature remains within safe operating limits during device operation.
105°C - Number of PWM Channels11
- Number of I2C Channels3
- Ambient Temperature Range High
This varies from person to person, but it is somewhere between 68 and 77 degrees F on average. The temperature setting that is comfortable for an individual may fluctuate with humidity and outside temperature as well. The temperature of an air conditioned room can also be considered ambient temperature.
85°C - Height1.6mm
- RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant
STM32L431RCT6 CAD Model
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STM32L431RCT6 Applications
Industrial control systems: The STM32L431RCT6’s high processing power and extensive I/O capabilities make it ideal for controlling complex industrial processes.
Medical devices: The low power consumption and high processing power of the STM32L431RCT6 make it suitable for battery-powered medical devices.
Consumer electronics: The STM32L431RCT6 can be used in a variety of consumer electronics applications, such as home automation systems, wearable devices, and gaming consoles.
Automotive applications: The STM32L431RCT6’s robustness and reliability make it suitable for use in automotive applications, such as engine control units and infotainment systems.
Communication systems: The STM32L431RCT6’s advanced communication interfaces make it ideal for use in communication systems, such as wireless routers and modems.
STM32L431RCT6 Manufacturer
STMicroelectronics is a multinational corporation and technology company of French-Italian origin1. It is engaged in the design, development, manufacture, and marketing of semiconductor products2. The company serves customers across the spectrum of electronics applications with innovative semiconductor solutions that make a positive contribution to people’s lives
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsData Bus WidthNumber of I/OInterfaceMemory SizeSupply VoltagePeripheralsView Compare
STM32L431RCT6
64-LQFP
64
32 b
52
CAN, I2C, IrDA, LIN, SPI, USART
256 kB
3 V
Brown-out Detect/Reset, DMA, PWM, WDT
64-LQFP
64
-
48
I2C, I2S, SPI, UART, USART, USB
512 kB
-
DMA, I2S, POR, PWM, WDT
64-LQFP
64
32 b
47
I2C, I2S, IrDA, SPI, UART, USART, USB
128 kB
1.2 V
Brown-out Detect/Reset, DMA, POR, PWM, WDT
64-LQFP
64
32 b
52
I2C, SPI, UART, USART
256 kB
3.3 V
Brown-out Detect/Reset, POR, WDT
64-UFBGA, WLCSP
64
32 b
51
CAN, I2C, IrDA, LIN, SPI, UART, USART, USB
256 kB
3.3 V
DMA, Motor Control PWM, PDR, POR, PVD, PWM, Temp Sensor, WDT
Datasheet PDF
- Datasheets :
STM32L43, 44, 45, 46 Reference Manual
STM32F3, F4, L4 Series Prog Manual
STM32L431RCT6-STMicroelectronics-datasheet-113979972.pdf
STM32L431RCT6-STMicroelectronics-datasheet-103686871.pdf
STM32L431RCT6-STMicroelectronics-datasheet-62341222.pdf
pid_4814711_stm32l431rct6-stmicroelectronics-datasheet-62341222.pdf
How can I program and debug the STM32L431RCT6?
You can use the ST-LINK/V2 or ST-LINK/V3 debugger/programmer to connect to the device via the SWD interface. You can also use the embedded bootloader to program the device via USART, SPI, I2C, or USB interfaces. You can use various software tools, such as STM32CubeIDE, STM32CubeMX, STM32CubeProgrammer, or Keil MDK, to develop, compile, and flash your code. For more details, please refer to the datasheet, the [application note], and the [user manual] of the device.
What are the differences between the STM32L431RC and the STM32L431RB devices?
The main difference between the STM32L431RC and the STM32L431RB devices is the flash memory size. The STM32L431RC has 256 KB of flash memory, while the STM32L431RB has 128 KB of flash memory. The other features and specifications are the same for both devices. You can compare the devices using the [product selector] tool.
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