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STMicroelectronics STM32L452RET6P
- Part No.:
- STM32L452RET6P
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L452RET6P.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,148
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Product details
Overview
STM32L452RET6P 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, op-amp with PGA, and RTC with hardware calendar. It supports external SMPS for 36 µA/MHz run-mode efficiency and targets battery-powered industrial sensors and portable medical devices.
For engineers reviewing the STM32L452RET6P datasheet, STM32L452RET6P pinout, STM32L452RET6P application, or STM32L452RET6P equivalent, key selection criteria include verified low-power mode current (22 nA Shutdown, 375 nA Standby+RTC), LQFP64 package compatibility, USB 2.0 full-speed crystal-less operation, and support for capacitive touch sensing across 21 channels.
Technical Context
The STM32L452RET6P implements FlexPowerControl architecture with five distinct low-power modes-Shutdown (22 nA), Standby (106 nA), Standby+RTC (375 nA), Stop 2 (2.05 µA), and Run (36 µA/MHz with SMPS)-enabling precise energy budgeting in intermittent-sensing applications. Its ART Accelerator™ enables zero-wait-state execution from Flash at 80 MHz, while dual PLLs independently supply system clock and audio/ADC domains.
It integrates a full analog subsystem with independent VDDA supply: one 12-bit ADC (5 Msps, hardware oversampling to 16-bit), two 12-bit DACs, two ultra-low-power comparators, one operational amplifier with programmable gain, and buffered 2.048 V/2.5 V reference voltage-enabling self-contained signal conditioning without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP tasks (e.g., 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 safety-critical data integrity |
| Low-Power Run | 36 µA/MHz @ 3.3 V with external SMPS - reduces battery drain in always-on edge nodes versus LDO-based alternatives |
| ADC | 12-bit, 5 Msps, hardware oversampling to 16-bit - achieves >14 ENOB for precision sensor acquisition without external sigma-delta converter |
| DAC | 2× 12-bit channels with sample-and-hold - drives analog actuators or calibration references directly from MCU pins |
| USB | Full-speed (12 Mbps), crystal-less, with LPM & BCD - eliminates external crystal and simplifies PCB layout in space-constrained designs |
| Package | LQFP64 (10 × 10 mm, 0.5 mm pitch) - standard footprint compatible with automated assembly and thermal management in industrial enclosures |
Pinout & Package
LQFP64 package: 64-pin quad flat pack, 10 mm × 10 mm body, 0.5 mm lead pitch, exposed pad for thermal dissipation, RoHS-compliant and ECOPACK2® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.71–3.6 V) | Supplies core, I/O, and most peripherals; requires local 100 nF + 4.7 µF decoupling per VDD group |
| VSS | Ground reference | Multiple dedicated pins ensure low-impedance return paths for analog/digital domains and reduce noise coupling |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1 | General-purpose I/Os | Up to 51 GPIOs; most are 5 V-tolerant, enabling direct interface with legacy 5 V logic or sensors |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB10, PB11, PC0–PC5, PC7, PC10, PC11, PC12, PD2, PF0, PF1 | Alternate function (AF) capable | Supports 17 communication interfaces including USB, SAI, 4× I²C, 4× USART, SPI, CAN, SDMMC - enables single-chip connectivity stack |
| VREF+ | Analog reference input | Accepts external reference or connects to internal 2.048 V/2.5 V buffered output for ADC/DAC accuracy stability |
| VDDA/VSSA | Analog power/ground | Independent supply domain isolates sensitive analog circuitry from digital switching noise |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl low-power modes | 22 nA Shutdown and 375 nA Standby+RTC enable multi-year battery life in wireless sensor nodes |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz eliminates performance penalty of on-chip memory access latency |
| Integrated analog subsystem | Single-chip solution includes ADC, DAC, op-amp, comparators, and VREFBUF - removes ≥6 external analog components |
| Capacitive touch sensing (TSC) | 21-channel controller supports touchkey, linear, and rotary sensors - enables intuitive HMI without dedicated touch IC |
| USB crystal-less full-speed | Eliminates 12 MHz crystal and associated load capacitors, reducing BOM cost and board area by ~3 mm² |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity/pressure sensor transmitting data via BLE gateway every 5 minutes. IC Role / Device Role / Timing Role: Main controller executing sensor acquisition, data preprocessing, low-power scheduling, and peripheral wake-up coordination. Use Value: 22 nA Shutdown current extends CR2032 battery life beyond 5 years; integrated ADC and op-amp condition signals without external amplifiers. |
Use Scenario: Handheld ECG/SpO₂ device requiring clinical-grade analog front-end and USB charging/data export. IC Role / Device Role / Timing Role: Signal acquisition hub managing analog sensor inputs, real-time filtering, display interface, and USB mass storage protocol. Use Value: Dual 12-bit DACs generate precise calibration references; 12-bit ADC with 5 Msps captures high-fidelity biosignals; USB crystal-less simplifies enclosure design. |
| Smart Utility Meter | Asset Tracking Beacon |
Use Scenario: Tamper-resistant electricity/water meter logging consumption hourly and reporting via NB-IoT/LPWAN. IC Role / Device Role / Timing Role: Secure data logger with RTC calendar, cryptographic acceleration (via CRC/RNG), and tamper detection I/O monitoring. Use Value: 96-bit unique ID and true RNG support secure key generation; RTC with hardware calendar ensures accurate billing intervals without host intervention. |
Use Scenario: GPS-denied indoor asset tracker using BLE beaconing and motion-triggered wake-up in warehouses. IC Role / Device Role / Timing Role: Motion-aware controller using LPTIM2 and EXTI pins to detect vibration/movement and initiate location sampling. Use Value: 4 µs wakeup from Stop mode enables rapid response to motion events; 21-channel TSC supports proximity detection for zone entry/exit. |
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 |
|---|---|---|---|
| STM32L432KCU6 | Smaller memory (256 KB Flash, 64 KB SRAM), no SAI or SDMMC, LQFP32 package | Suitable for simpler BLE beacons or basic sensor nodes without audio or high-bandwidth storage | Select when BOM cost and board area are critical, and advanced peripherals are unnecessary |
| STM32L552RET6P | ARM TrustZone®, 32 KB SRAM with ECC, enhanced security features, same LQFP64 package | Required for applications needing PSA Level 1 certification, secure boot, or encrypted firmware updates | Select when hardware-enforced isolation and cryptographic accelerators are mandatory for compliance |
Compared with STM32L432KCU6, the STM32L452RET6P delivers 2× Flash/SRAM and adds SAI, SDMMC, and CAN-justifying its use in richer edge nodes; versus STM32L552RET6P, it trades security extensions for lower cost and broader toolchain maturity in non-certified deployments.
Availability
STM32L452RET6P is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart utility meters, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32L452RET6P 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, sensors, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and real-time performance-optimized for IoT endpoints, wearables, and industrial monitoring systems.
FAQ
What is the maximum operating frequency and corresponding performance metric?
The STM32L452RET6P operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and ART Accelerator™, delivering 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). This enables deterministic execution of floating-point math, FFTs, and real-time control loops without external coprocessors.
Does this MCU support external SMPS, and what is the measured efficiency benefit?
Yes, the STM32L452RET6P supports external SMPS via dedicated VDD12 and VDD12_IO pins. With SMPS enabled, active-mode current drops to 36 µA/MHz at 3.3 V-versus 84 µA/MHz in LDO mode-reducing power consumption by over 57% during sustained processing, critical for battery longevity.
How many communication interfaces are integrated, and which are available in low-power modes?
It integrates 17 communication interfaces: USB 2.0 FS, SAI, 4× I²C, 4× USART, 1× UART, 1× LPUART, 3× SPI, QuadSPI, CAN 2.0B, SDMMC, and IRTIM. The LPUART and two low-power timers (LPTIM1/LPTIM2) remain active in Stop 2 mode, enabling asynchronous wake-up without full system restart.
What analog peripherals are included, and how are they isolated for precision operation?
The MCU includes a 12-bit ADC (5 Msps), two 12-bit DACs, one op-amp with PGA, two ultra-low-power comparators, and a buffered 2.048 V/2.5 V reference. These operate from a dedicated VDDA/VSSA supply domain, physically and electrically isolated from digital power rails to minimize noise coupling and maintain ±1 LSB INL accuracy.
STM32L452RET6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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, MMC/SD, QSPI, SAI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT, (External SMPS Required)
- Number of I/O:
- 52
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L452RET6P FAQ
1.How can I place an order for STM32L452RET6P through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L452RET6P 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 STM32L452RET6P reliable?
The price and inventory of STM32L452RET6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L452RET6P is usually 5 days.
3.What payment methods are accepted for STM32L452RET6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L452RET6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L452RET6P?
STM32L452RET6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L452RET6P 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 STM32L452RET6P?
For technical support, including STM32L452RET6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L452RET6P requirements.
6.How does Aetrix verify that STM32L452RET6P is sourced from the original manufacturer or authorized distributors?
All STM32L452RET6P 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 STM32L452RET6P meets industry standards.
7.What is the process for return or replacement of STM32L452RET6P?
All STM32L452RET6P units undergo pre-shipment inspection (PSI). If there is an issue with STM32L452RET6P, 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 STM32L452RET6P part is unused and in its original packaging.
Return procedure for STM32L452RET6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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