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STMicroelectronics STM32L452VEI3
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- Part No.:
- STM32L452VEI3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-UFBGA
- Datasheet:
-
STM32L452VEI3.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 100UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,331
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Product details
Overview
STM32L452VEI3 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB Flash, 160 KB SRAM, and integrated analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DAC, and operational amplifier. It supports external SMPS for 36 µA/MHz run efficiency and targets battery-powered IoT sensors, portable medical devices, and energy-harvesting edge nodes.
For engineers reviewing the STM32L452VEI3 datasheet, STM32L452VEI3 pinout, STM32L452VEI3 application, or STM32L452VEI3 equivalent, key selection criteria include verified low-power mode current (375 nA Standby + RTC), UFBGA100 package compatibility, USB 2.0 full-speed crystal-less operation, and hardware-accelerated cryptographic support via TRNG and CRC unit.
Technical Context
The STM32L452VEI3 integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from Flash at 80 MHz, alongside a dual-voltage domain architecture supporting both LDO and external SMPS power schemes. Its interconnect matrix decouples bus arbitration between CPU, DMA, and peripherals to sustain deterministic real-time performance.
It implements FlexPowerControl with seven low-power modes - including Stop 2 (2.40 µA with RTC) and Shutdown (22 nA) - managed by a dedicated power control block with brown-out reset (BOR) and voltage scaling. The analog subsystem operates on an independent supply rail, enabling simultaneous high-precision sensing and ultra-low-power sleep retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP and sensor fusion without external co-processor |
| Memory | 512 KB Flash (single-bank, code readout protection), 160 KB SRAM (32 KB with parity) - supports secure firmware updates and robust data logging |
| Power Efficiency | 36 µA/MHz in SMPS Run mode - reduces battery drain in always-on edge nodes with sustained processing |
| Analog Peripherals | 1× 12-bit ADC (5 Msps, hardware oversampling to 16-bit), 2× 12-bit DAC, 1× OPAMP with PGA - enables closed-loop analog control and audio playback without external signal chain |
| Low-Power Modes | 375 nA Standby + RTC, 2.40 µA Stop 2 with RTC - preserves timekeeping and wake-up capability during multi-week battery sleep |
| Connectivity | USB 2.0 FS crystal-less, SAI, 4× I²C (FM+), 3× USART, LPUART, CAN 2.0B - supports wired/wireless gateway functions and industrial fieldbus interoperability |
| Clock System | Dual PLLs, internal 48 MHz RC with clock recovery, auto-trimmed multispeed oscillator (±0.25%) - eliminates external crystal cost while maintaining USB timing accuracy |
Pinout & Package
STM32L452VEI3 is packaged in a 100-pin UFBGA (7 × 7 mm, 0.5 mm pitch), optimized for compact, high-density PCB layouts in space-constrained portable applications. Pin definitions align with STM32L452xx family standardization, supporting drop-in compatibility across LQFP100 and UFBGA100 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power/ground | Supports dual-supply configuration: VDD (1.71–3.6 V) and VDDA (independent analog rail) |
| VBAT | Backup power input | Enables RTC and 32×32-bit backup registers during main power loss (145 nA consumption) |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | Up to 83 fast I/Os; most 5 V-tolerant - simplifies level-shifting in mixed-voltage systems |
| PA9/PA10 | USART1 TX/RX | Supports LIN, IrDA, modem protocols - suitable for automotive body electronics diagnostics |
| PA11/PA12 | USB D+/D− | Crystal-less full-speed USB 2.0 interface - eliminates 48 MHz crystal and associated BOM cost |
| PC13 | RTC_OUT / LSE | 32 kHz crystal oscillator output or RTC alarm pulse - enables precise timekeeping and periodic wake-up scheduling |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Seven configurable low-power modes with sub-µA retention - extends battery life in wearable and remote sensor nodes |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz - eliminates instruction cache misses in deterministic real-time control loops |
| Hardware crypto acceleration | TRNG + CRC unit + 96-bit unique ID - enables secure device identity and firmware integrity verification |
| Capacitive touch sensing | 21-channel TSC supporting touchkey, linear, and rotary sensors - replaces mechanical buttons in HMI designs without external IC |
| Independent analog supply | Dedicated VDDA rail with buffered 2.048 V/2.5 V reference - ensures stable ADC/DAC performance amid digital switching noise |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition and local anomaly detection in wrist-worn devices. IC Role / Device Role / Timing Role: Main controller executing sensor fusion algorithms, managing BLE connectivity, and maintaining RTC-synchronized sampling intervals. Use Value: 375 nA Standby + RTC enables multi-month operation on coin-cell; integrated OPAMP and ADC eliminate external signal conditioning components. | Use Scenario: Battery-backed electricity/water meter with tamper detection, pulse counting, and RF communication. IC Role / Device Role / Timing Role: System-on-chip handling metrology calculations, secure data logging, and scheduled LPUART wake-up for NB-IoT transmission. Use Value: 22 nA Shutdown mode preserves battery for >10 years; CAN 2.0B interface supports legacy AMR infrastructure integration. |
| Industrial Predictive Maintenance Sensor | Portable Audio Recorder |
Use Scenario: Vibration and temperature monitoring on rotating machinery using MEMS accelerometers and thermistors. IC Role / Device Role / Timing Role: Edge AI inference node running lightweight ML models, with batch acquisition mode (BAM) for synchronized multi-sensor capture. Use Value: 84 µA/MHz (LDO) and 36 µA/MHz (SMPS) enable continuous sensing at <10 µW average power; Quad SPI supports external XIP flash for model storage. | Use Scenario: Voice memo recorder with line-in, microphone preamp, and stereo playback via headphones. IC Role / Device Role / Timing Role: Audio SoC managing SAI-driven codec interface, DAC-based analog output, and USB mass-storage class file transfer. Use Value: Integrated SAI + dual DAC + OPAMP supports direct analog audio path; crystal-less USB allows plug-and-play PC connectivity without timing component. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L476RG | Higher Flash (1 MB), added Ethernet MAC and LCD-TFT controller; no SAI or DFSDM | Better suited for HMI-rich gateways; lacks audio interface needed for voice-enabled edge devices | Select when display or network connectivity outweighs audio/peripheral density requirements |
| STM32L552ZE | ARM TrustZone®, 256 KB SRAM, 512 KB Flash, enhanced security features; higher active current (42 µA/MHz SMPS) | Designed for certified secure boot and firmware attestation; requires additional security validation effort | Choose for regulated environments (e.g., medical, payment) where hardware-enforced isolation is mandatory |
Compared with STM32L476RG and STM32L552ZE, the STM32L452VEI3 delivers optimal balance of audio capability (SAI + DAC), ultra-low-power analog integration (OPAMP + COMP), and minimal BOM cost - making it the preferred choice for resource-constrained, battery-operated audio and sensing endpoints.
Availability
STM32L452VEI3 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial predictive maintenance sensors, and portable audio recorders requiring stable component supply across long-lifecycle deployments.
Supply support for STM32L452VEI3 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, delivering microcontrollers, power management, and sensing solutions for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and real-time responsiveness - specifically engineered for intelligent edge nodes in IoT and portable electronics.
FAQ
What is the maximum operating frequency and corresponding performance metric of the STM32L452VEI3?
The STM32L452VEI3 operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and ART Accelerator™, achieving 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance level supports real-time sensor fusion, audio processing, and lightweight ML inference without external coprocessors.
Does the STM32L452VEI3 support crystal-less USB operation, and what are the implications?
Yes, it integrates a USB 2.0 full-speed crystal-less solution with built-in clock recovery, eliminating the need for an external 48 MHz crystal. This reduces BOM cost and PCB area while maintaining ±0.25% timing accuracy required for USB compliance - critical for compact, cost-sensitive portable devices.
How does the FlexPowerControl architecture improve battery lifetime in real-world use cases?
FlexPowerControl provides seven low-power modes with validated current draw: 22 nA Shutdown, 106 nA Standby, and 2.40 µA Stop 2 with RTC. Combined with BAM for synchronized sensor acquisition and 4 µs wakeup, it enables multi-year operation in battery-powered sensors - verified in field deployments for smart meters and environmental monitors.
Which analog peripherals are available on-chip, and how do they reduce external component count?
The device integrates a 12-bit ADC (5 Msps), two 12-bit DACs, one operational amplifier with programmable gain, two ultra-low-power comparators, and a buffered 2.048 V/2.5 V reference. These eliminate need for external signal conditioning, precision references, and DAC/ADC ICs - reducing bill-of-materials by up to 5 components in typical sensor node designs.
STM32L452VEI3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-UFBGA
- 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, MMC/SD, QSPI, SAI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 83
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 160K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L452VEI3 FAQ
1.How can I place an order for STM32L452VEI3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L452VEI3 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 STM32L452VEI3 reliable?
The price and inventory of STM32L452VEI3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L452VEI3 is usually 5 days.
3.What payment methods are accepted for STM32L452VEI3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L452VEI3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L452VEI3?
STM32L452VEI3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L452VEI3 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 STM32L452VEI3?
For technical support, including STM32L452VEI3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L452VEI3 requirements.
6.How does Aetrix verify that STM32L452VEI3 is sourced from the original manufacturer or authorized distributors?
All STM32L452VEI3 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 STM32L452VEI3 meets industry standards.
7.What is the process for return or replacement of STM32L452VEI3?
All STM32L452VEI3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L452VEI3, 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 STM32L452VEI3 part is unused and in its original packaging.
Return procedure for STM32L452VEI3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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