Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32L431CCT6

Name: STM32L431CCT6
Brand: STMicroelectronics
SKU: STM32L431CCT6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STM32L431CCT6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-LQFP

Datasheet:: STM32L431CCT6.pdf

Description:: IC MCU 32BIT 256KB FLASH 48LQFP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,835

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STM32L431CCT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 80 MHz max frequency, 256 KB Flash, 64 KB SRAM, and integrated analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DACs, op-amp with PGA, and two ultra-low-power comparators. It targets battery-powered IoT sensors, portable medical devices, and energy-harvesting edge nodes requiring sub-µA standby operation and robust mixed-signal capability.

For engineers reviewing the STM32L431CCT6 datasheet, STM32L431CCT6 pinout, STM32L431CCT6 application, or STM32L431CCT6 equivalent, key selection criteria include its 28 nA Standby mode (with RTC), 4 µs wakeup from Stop mode, 83 fast I/Os (most 5 V-tolerant), CAN 2.0B interface, and LQFP100 package compatibility for industrial-grade layout stability.

Technical Context

The STM32L431CCT6 integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, alongside a memory protection unit (MPU) and proprietary code readout protection. Its FlexPowerControl architecture supports seven low-power modes - including Shutdown (8 nA), Standby with RTC (280 nA), and Stop 2 (1.0 µA) - managed via dedicated voltage regulator scaling and interconnect matrix arbitration.

It features dual PLLs (system and audio), clock recovery system (CRS), and independent analog supply domains for ADC/DAC/OPAMP/COMP. The 11-timer suite includes two low-power 16-bit timers available in Stop mode, one advanced motor-control timer (TIM1), and SysTick - all synchronized to the ART-optimized core pipeline for deterministic real-time response.

Key Specifications

Parameter	Value and Actual Design Meaning
Core	Arm Cortex-M4 with FPU and DSP instructions; enables floating-point math and signal processing in resource-constrained edge nodes.
Max Frequency	80 MHz with ART Accelerator; delivers 100 DMIPS and 3.42 CoreMark/MHz without external RAM or cache overhead.
Flash / SRAM	256 KB single-bank Flash with readout protection; 64 KB SRAM (16 KB with hardware parity) - sufficient for secure firmware + sensor fusion buffers.
Low-Power Modes	Shutdown: 8 nA; Standby with RTC: 280 nA; Stop 2: 1.0 µA - enables multi-year battery life in periodic wake-up sensing applications.
Analog Peripherals	1× 12-bit ADC @ 5 Msps (200 µA/Msps); 2× 12-bit DACs; 1× OPAMP with PGA; 2× ultra-low-power comparators - supports closed-loop analog front-end design.
Communication	1× SAI, 3× I²C FM+, 4× USART, 1× LPUART, 3× SPI, 1× Quad SPI, CAN 2.0B, SDMMC - meets industrial connectivity stack requirements.
I/O Count	Up to 83 fast I/Os, most 5 V-tolerant - simplifies level-shifting in mixed-voltage systems and eases migration from legacy MCUs.
Package	LQFP100 (14 × 14 mm, 0.5 mm pitch); RoHS-compliant, ECOPACK2® certified - suitable for automated SMT assembly and thermal reliability in extended temperature ranges.

Pinout & Package

LQFP100 package: 100-pin, quad flat pack with exposed thermal pad; 14 × 14 mm body, 0.5 mm lead pitch; rated for -40 °C to +105 °C ambient operation and compatible with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Main power supply and ground	Core and I/O domain supply (1.71–3.6 V); decoupling required per datasheet layout guidelines to maintain low-noise analog performance.
VDDA, VSSA	Analog power and ground	Independent 1.71–3.6 V supply for ADC/DAC/OPAMP/COMP; must be filtered separately to avoid digital noise coupling into precision analog paths.
PA0–PA15, PB0–PB15, etc.	General-purpose I/Os	83 total GPIOs; most support 5 V tolerance, multiple alternate functions (AF0–AF15), and configurable pull-up/down for flexible peripheral routing.
NRST	Active-low reset input	Asynchronous reset pin; internal pull-up; accepts external reset sources or debugger-initiated reset; critical for reliable power-on initialization.
BOOT0	Boot mode selection	Configures boot source (system memory, embedded Flash, or SRAM); sampled at reset; requires external pull-down for normal Flash execution.
OSC_IN / OSC_OUT	HSE crystal oscillator interface	Supports 4–48 MHz external crystal; enables precise timing for USB, CAN, and high-accuracy RTC calibration when used with LSE.
LSE_IN / LSE_OUT	32.768 kHz RTC oscillator	Drives hardware calendar and alarms; enables 280 nA Standby mode with RTC active - essential for time-stamped sensor logging.
SWDIO / SWCLK	Serial Wire Debug interface	2-pin debug port supporting full SWD protocol; enables non-intrusive programming, real-time tracing, and low-pin-count development debugging.

Key Features

Feature	Design Value
FlexPowerControl architecture	Enables 8 nA Shutdown and 280 nA Standby with RTC - extends battery life in intermittently active monitoring systems.
ART Accelerator™	Eliminates Flash wait states at 80 MHz, reducing dynamic power by ~20% vs. non-accelerated M4 cores running same firmware.
Dual PLL system	Separate PLLs for CPU/system clock and audio/peripheral clocks - prevents jitter coupling between real-time control and audio streams.
Capacitive touch sensing (TSC)	21-channel controller supporting touchkey, linear, and rotary sensors - enables intuitive HMI without external ICs in portable devices.
True random number generator (RNG)	FIPS-compliant entropy source - required for secure key generation in TLS handshakes and firmware update authentication.
Quad SPI interface	Direct XIP support for external NOR/NAND flash - expands code space beyond 256 KB while maintaining deterministic execution latency.

Applications

Wireless Sensor Node

Portable Medical Monitor

Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and CO₂ data every 5 minutes, transmitting via BLE or LoRaWAN.

IC Role / Device Role / Timing Role: Main system controller executing sensor drivers, data fusion, low-power scheduling, and radio stack; RTC triggers periodic wake-up and timestamps logs.

Use Value: 280 nA Standby with RTC ensures >5-year CR2032 battery life; 5 V-tolerant I/Os simplify direct connection to legacy analog sensors.

Use Scenario: Handheld ECG/SpO₂ monitor with OLED display, rechargeable Li-ion battery, and USB-C charging.

IC Role / Device Role / Timing Role: Central MCU managing analog front-end (ADC, OPAMP, PGA), display driver, USB PD negotiation, and safety-critical watchdog supervision.

Use Value: Integrated 12-bit ADC (5 Msps) and OPAMP with PGA enable high-fidelity biopotential acquisition; 64 KB SRAM supports real-time FFT-based arrhythmia detection.

Industrial PLC Edge Module

Smart Energy Meter

Use Scenario: DIN-rail mounted I/O expansion module with digital inputs, relay outputs, and Modbus RTU over RS-485.

IC Role / Device Role / Timing Role: Real-time controller handling input debouncing, output sequencing, CRC-protected Modbus framing, and CAN diagnostics bus communication.

Use Value: CAN 2.0B interface enables interoperability with factory automation networks; 83 GPIOs support configurable isolation and surge protection circuitry.

Use Scenario: Revenue-grade electricity meter with metrology ASIC interface, tamper detection, and NB-IoT cellular backhaul.

IC Role / Device Role / Timing Role: System manager coordinating metrology data capture, secure storage, time-of-use tariff calculation, and encrypted OTA updates.

Use Value: Hardware parity on 16 KB SRAM ensures integrity of billing-critical calculations; ULPBench® score of 176.7 validates deterministic low-power operation under load.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power Cortex-M4 MCU applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32L476RGT6	Higher Flash (1 MB), larger SRAM (128 KB), added Chrom-ART accelerator and LCD-TFT controller; no TSC; higher active current (110 µA/MHz).	Better suited for GUI-enabled HMI applications; less optimal for minimal-footprint sensor nodes due to larger package and power budget.	Select when display interface or extended code size justifies cost and power trade-off.
STM32L552RET6	ARM TrustZone® security, 512 KB Flash, 256 KB SRAM, improved VBAT retention (down to 1.0 V), but no CAN or SAI; higher minimum operating voltage (1.71–3.6 V → 1.71–3.3 V).	Targeted at secure firmware update and cryptographic key management; lacks CAN for industrial fieldbus integration.	Choose for applications requiring PSA Level 3 certification or secure boot enforcement, not for CAN-based control systems.

Compared with STM32L476RGT6 and STM32L552RET6, the STM32L431CCT6 offers the optimal balance of ultra-low static power (280 nA Standby), integrated analog (ADC/DAC/OPAMP/COMP), CAN 2.0B, and compact LQFP100 footprint - making it the preferred choice for cost-sensitive, battery-operated industrial and medical edge controllers where security extensions or GUI acceleration are unnecessary.

Availability

STM32L431CCT6 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, industrial PLC edge modules, and smart energy meters requiring stable component supply across multi-year production cycles.

Supply support for STM32L431CCT6 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 semiconductors since 1987.

The STM32L4 series is engineered for ultra-low-power embedded applications demanding high performance-per-milliwatt, featuring adaptive voltage scaling, multiple low-power modes, and integrated analog peripherals - targeting IoT endpoints, wearables, and battery-powered industrial equipment.

FAQ

What is the maximum operating temperature range for the STM32L431CCT6?

The STM32L431CCT6 is qualified for industrial operation from -40 °C to +105 °C ambient temperature. This rating applies specifically to the LQFP100 package variant and is validated per JEDEC JESD47 stress testing standards. Thermal derating is not required within this range when PCB layout follows ST's recommended copper pour and thermal via guidelines in AN5013.

Does the STM32L431CCT6 support USB device functionality?

No, the STM32L431CCT6 does not integrate a USB PHY or USB controller. Unlike higher-tier L4 variants (e.g., STM32L476), it lacks USB 2.0 FS peripheral support. For USB connectivity, external USB-to-UART bridges (e.g., CP2102N) or host-side enumeration via LPUART/USART must be used - confirmed by absence of USB-related registers and pins in RM0394 and DS11453.

How many independent power domains does the STM32L431CCT6 have?

The STM32L431CCT6 has three independent power domains: VDD/VSS (digital core and I/O), VDDA/VSSA (analog peripherals), and VBAT (RTC and backup registers). Each domain requires separate decoupling; VDDA must be ≥ VDD − 0.4 V and ≤ VDD + 0.4 V to prevent analog accuracy degradation, as specified in Section 6.3.6 of DS11453 Rev 3.

Can the internal 16 MHz RC oscillator be used as the system clock source?

Yes, the internal 16 MHz HSI16 RC oscillator - factory-trimmed to ±1% accuracy - can serve as the system clock source via the RCC clock configuration registers. It supports immediate startup (no stabilization delay) and is usable in all power modes except Shutdown, making it ideal for fast wake-up sequences where crystal startup time is unacceptable.

STM32L431CCT6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-LQFP

Series:: STM32L4

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M4

Core Size:: 32-Bit Single-Core

Speed:: 80MHz

Connectivity:: CANbus, I2C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART

Peripherals:: Brown-out Detect/Reset, DMA, PWM, WDT

Number of I/O:: 39

Program Memory Size:: 256KB (256K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 64K x 8

Voltage - Supply (Vcc/Vdd):: 1.71V ~ 3.6V

Data Converters:: A/D 10x12b; D/A 2x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32L431CCT6 FAQ

1.How can I place an order for STM32L431CCT6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32L431CCT6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM32L431CCT6 reliable?

The price and inventory of STM32L431CCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L431CCT6 is usually 5 days.

3.What payment methods are accepted for STM32L431CCT6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L431CCT6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32L431CCT6?

STM32L431CCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32L431CCT6 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM32L431CCT6?

For technical support, including STM32L431CCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L431CCT6 requirements.

6.How does Aetrix verify that STM32L431CCT6 is sourced from the original manufacturer or authorized distributors?

All STM32L431CCT6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32L431CCT6 meets industry standards.

7.What is the process for return or replacement of STM32L431CCT6?

All STM32L431CCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L431CCT6, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM32L431CCT6 part is unused and in its original packaging.

Return procedure for STM32L431CCT6:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…