STM32L431VCI6 - 80MHz Cortex-M4 MCU | STMicroelectronics
MPN： STM32L431VCI6 ✓ 啟用中STM32L431VCI6 概覽
An ultra-low-power microcontroller is an embedded processing component designed to balance computational capability with energy efficiency. Within the device hierarchy, the STM32L431VCI6 is a 32-bit microcontroller built around the Arm Cortex-M4 processor core. It belongs to STMicroelectronics' STM32L4 family and supports applications in which compact size, low-power operation, mixed-signal control, communications, and real-time processing are important.
Core features include an operating frequency of up to 80 MHz, 256 KB of Flash, single-precision floating-point hardware, and DSP instruction support. The 100-UFBGA package provides a compact surface-mount solution for space-constrained embedded products. Operating voltage selections shown for this exact device include 1.8 V, 2.5 V, and 3.3 V, allowing integration with common low-voltage embedded systems. The manufacturer identifies the device as an ultra-low-power Arm Cortex-M4 MCU.
The Cortex-M4 architecture combines a 32-bit RISC instruction set with an efficient exception-based operating model and hardware features suited to control workloads. The floating-point unit accelerates single-precision operations without requiring software emulation, while DSP instructions support common filtering and signal-processing calculations. These capabilities make the MCU suitable for connected sensors, industrial controls, medical instruments, and low-power embedded products requiring more performance than a basic Cortex-M0-class device.
Typical applications include low-power sensor nodes, industrial monitoring equipment, compact data loggers, connected measurement instruments, and embedded control systems. The 256 KB Flash capacity provides room for application firmware and configuration data, while the 7 x 7 mm UFBGA package helps reduce board footprint. Confirm peripheral assignments, clock configuration, and power-supply requirements against the manufacturer datasheet before finalizing a PCB layout.
For PCB implementation, use the manufacturer land pattern for the 100-UFBGA package and preserve the documented pin, power, ground, decoupling, and programming connections. Because this package has a fine ball pitch and 100 terminals, inspect the assembled board for solder bridges and verify continuity on every power rail. Match external crystal, reset, and boot circuitry to the device reference configuration rather than relying on another STM32 footprint.
This page combines the manufacturer product information with practical implementation guidance, focused comparisons, and verified source links. It also distinguishes the exact STM32L431VCI6 configuration from related STM32L431 family variants so engineers can assess memory capacity, package, and qualification requirements before selecting a replacement.
直接替換替代品，適用於 STM32L431VCI6 — 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： STM32L431VCI6 （相同外形與佔位） — 差異在於 Flash Memory, Package, Product Type.
STM32L431VCT6
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →STM32L431VBI6
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32L431VAI6
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM32L431VCI6 最大額定值與電氣特性
| Product Type | 32-bit ultra-low-power microcontroller (MCU) |
| Processor Core | Arm Cortex-M4 with single-precision FPU |
| Architecture | 32-bit RISC |
| 最大時脈頻率 | 80 MHz |
| Flash Memory | 256 KB (256K x 8) |
| Floating-Point Support | Single-precision FPU |
| DSP Instruction Support | Yes |
| 封裝 | 100-UFBGA (7 x 7 mm) |
| Terminal Count | 100 terminals |
| 安裝類型 | Surface mount |
| Operating Voltage Options | 1.8 V, 2.5 V, and 3.3 V |
| Program Memory Type | Flash |
| Memory Organization | 256K x 8 |
| Product Family | STM32L4 |
| Core Variant | Cortex-M4F |
STM32L431VCI6 100-ufbga (7 x 7 mm) 腳位配置指南
STM32L431VCI6（100-ufbga (7 x 7 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： STM32L431VCI6.
請參閱 資料表 以查看完整腳位配置。
典型應用
STM32L431VCI6 適用於 6 應用s: Low-Power Sensor Nodes, Industrial Monitoring Equipment, Portable Medical Instruments, Connected Measurement Instruments, Compact Data Loggers, Embedded Control Systems.
Low-Power Sensor Nodes
The STM32L431VCI6 fits low-power sensor nodes because its Arm Cortex-M4 core operates up to 80 MHz while the manufacturer positions the STM32L431 family as an ultra-low-power MCU platform. The single-precision FPU and DSP instructions can accelerate filtering, scaling, and sensor fusion locally, while 256 KB of Flash provides room for firmware and data buffers. Operating from a 1.8 V, 2.5 V, or 3.3 V rail supports compact battery-powered designs. Actual energy consumption depends on the selected sleep mode, sampling rate, radio activity, and peripheral configuration, so validate the complete duty cycle rather than relying only on the maximum clock frequency.
推薦
Industrial Monitoring Equipment
The STM32L431VCI6 is appropriate for industrial monitoring equipment that must combine local control, data acquisition, and communication in a compact assembly. Its 80 MHz Cortex-M4F processor executes control logic, while hardware floating-point and DSP instructions support real-time calculations on sampled process data. The 100-UFBGA 7 x 7 mm package limits board area, and the listed 1.8 V, 2.5 V, or 3.3 V supply options support different sensor and interface levels. For a deployed system, verify industrial temperature requirements, isolation, surge protection, and grounding independently of the MCU’s stated operating characteristics.
推薦
Portable Medical Instruments
The STM32L431VCI6 can support portable medical-instrument functions where local signal processing, compact construction, and low-power operation are important. The Cortex-M4F core reaches 80 MHz and includes single-precision floating-point plus DSP instructions, enabling efficient implementation of digital filters and control calculations. Its 256 KB of Flash accommodates embedded control software, and the 100-UFBGA package reduces the footprint of handheld equipment. Medical use also requires validation of the complete signal chain, isolation strategy, patient protection, regulatory workflow, and operating-temperature needs; the MCU classification alone does not establish medical-system compliance.
推薦
Connected Measurement Instruments
The STM32L431VCI6 supports connected measurement instruments that must acquire, process, and communicate data while maintaining a compact, energy-conscious design. At up to 80 MHz, the Cortex-M4F core can run protocol handling and user-interface logic, while the DSP instructions improve the efficiency of filtering and calibration calculations. The exact configuration offers 256 KB of Flash and 1.8 V, 2.5 V, or 3.3 V operation, allowing integration with low-voltage sensors and transceivers. Designers should allocate pin resources early for communications, programming, debugging, and auxiliary analog functions because the fine-pitch BGA footprint requires careful assembly planning.
推薦
Compact Data Loggers
The STM32L431VCI6 is well matched to compact data loggers that periodically record sensor information and manage local storage or communications. Its ultra-low-power STM32L4 positioning supports duty-cycled operation, while the 80 MHz Cortex-M4F core leaves processing headroom for compression, timestamp management, and data validation between samples. The 256 KB Flash configuration can hold firmware and fixed configuration data, although larger logging buffers may require external memory. The 100-UFBGA 7 x 7 mm package helps minimize board area, but designers should verify decoupling, programming access, ground-plane continuity, and battery-current behavior in the final assembly.
推薦
Embedded Control Systems
The STM32L431VCI6 can serve as the central controller in compact embedded systems that coordinate analog sensing, digital logic, and external communication. Its Cortex-M4 architecture provides deterministic 32-bit instruction execution up to 80 MHz, and the hardware FPU improves the efficiency of control calculations. The 100-UFBGA package is useful when the controller must fit beside dense analog or communication circuitry, while 1.8 V, 2.5 V, and 3.3 V operating options support multiple rail architectures. Final design work should confirm interrupt priorities, peripheral availability, memory-map expectations, startup configuration, and the exact pin assignments in the manufacturer STM32L431xx documentation.
推薦
推薦產品摘要
工程參考資料，適用於 STM32L431VCI6 — 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 | STM32L431VCT6 | STM32L431VBI6 | STM32L431VAI6 |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 100-UFBGA (7 x 7 mm) | 100-UFBGA (7 x 7 mm) | 100-UFBGA (7 x 7 mm) | 100-UFBGA (7 x 7 mm) |
| Processor Core | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU |
| Maximum Clock Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 128 KB | 64 KB |
| Floating-Point Unit | Single precision | Single precision | Single precision | Single precision |
| DSP Instructions | Supported | Supported | Supported | Supported |
| Temperature Grade | I grade indicated by MPN | T grade indicated by MPN | I grade indicated by MPN | I grade indicated by MPN |
主要差異化特點
- Larger Flash option within the same 100-UFBGA STM32L431 family (對比STM32L431VBI6)
- Substantially more Flash than the entry-level VAI6 configuration (對比STM32L431VAI6)
- Retains 80 MHz Cortex-M4F performance across the compared family variants (對比STM32L431VAI6)
設計說明
Use the STM32L431VC manufacturer land pattern for the 100-UFBGA 7 x 7 mm package. Place all input and output decoupling capacitors adjacent to their corresponding power and ground balls, while preserving uninterrupted ground connectivity beneath and around the device. Because the package uses 100 fine-pitch terminals, inspect the PCB for pad-to-pad solder bridges and verify that the assembly process supports the package geometry.
Plan the supply rails around the exact 1.8 V, 2.5 V, or 3.3 V operating option, including startup sequencing, current limits, and voltage tolerance. Separate analog and digital return paths where practical and place bulk and high-frequency decoupling at the board entry point and IC pins. Confirm the final power-consumption budget against the selected low-power mode because CPU activity, flash execution, and active peripherals can change total supply demand.
Do not treat a 100-terminal LQFP device as a mechanical substitute for this 100-UFBGA package. Pin numbering, ball assignments, pad geometry, paste printing, and assembly inspection differ even when both packages contain 100 terminals. Also verify programming access, boot configuration, reset behavior, and oscillator connections against the STM32L431xx reference configuration before releasing production artwork.
Review peripheral multiplexing before assigning external connections because the 100-UFBGA footprint can constrain simultaneous use of communication, timer, and analog functions. Keep sensitive sensor inputs away from high-current switching paths and provide a clean local reference for each analog rail. Validate the PCB with the manufacturer's pin-description table and land pattern rather than relying on a generic STM32 footprint.
合規資訊
The manufacturer product and datasheet pages identify the STM32L431VCI6 as an ultra-low-power Arm Cortex-M4 MCU. Specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations require confirmation in the applicable STMicroelectronics compliance documentation.
