My Inquiry
My Account
STMicroelectronics STM32L452RCT6
- Part No.:
- STM32L452RCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L452RCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,894
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32L452RCT6 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 DAC, op-amp with PGA, and ultra-low-power comparators. It supports external SMPS for 36 µA/MHz run efficiency and operates across -40 °C to 85 °C in LQFP64 package - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L452RCT6 datasheet, STM32L452RCT6 pinout, STM32L452RCT6 application, or STM32L452RCT6 equivalent, key selection criteria include verified 2.05 µA Stop 2 mode current, 4 µs wakeup latency, USB 2.0 full-speed crystal-less operation, and hardware-accelerated cryptographic support via TRNG and CRC unit.
Technical Context
The STM32L452RCT6 implements FlexPowerControl architecture with five low-power modes (Shutdown, Standby, Stop 2, Low-power Run, Run), enabling sub-µA retention states while maintaining RTC and 32×32-bit backup registers. Its ART Accelerator™ delivers zero-wait-state execution from Flash at 80 MHz, and dual PLLs separately clock system, audio (SAI), and ADC domains.
It integrates independent analog supply domains supporting simultaneous high-precision sensing (12-bit ADC + oversampling up to 16-bit) and real-time signal conditioning (op-amp + PGA + dual comparators). The interconnect matrix enables concurrent peripheral access without bus contention, critical for deterministic sensor fusion in edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP filtering and control loop execution in resource-constrained edge devices. |
| Memory | 256 KB Flash (single-bank), 64 KB SRAM (32 KB with parity) - sufficient for secure bootloader, OTA update partitioning, and sensor buffer management. |
| Power Consumption | 2.05 µA in Stop 2 mode (with RTC), 36 µA/MHz in SMPS-run mode - extends coin-cell battery life to >5 years in periodic wake-up sensing applications. |
| Analog Peripherals | 1× 12-bit ADC (5 Msps, 16-bit oversampling), 2× 12-bit DAC, 1× op-amp with PGA, 2× ultra-low-power comparators - supports closed-loop analog front-end design without external signal chain ICs. |
| Communication | USB 2.0 FS (crystal-less), 4× I²C (FM+), 3× USART, 1× LPUART, 1× SAI, 3× SPI, Quad-SPI - enables direct USB-C connectivity, multi-sensor I²C daisy-chaining, and audio streaming to external codecs. |
| Clock System | Dual PLLs, internal 48 MHz RC with CRS, 4–48 MHz HSE, 32 kHz LSE - provides robust clock redundancy and jitter-free timing for USB and audio synchronization. |
| Security & Debug | TRNG, CRC unit, 96-bit unique ID, SWD/JTAG, Embedded Trace Macrocell - meets basic firmware integrity and traceability requirements for industrial certification. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 general-purpose I/Os (most 5 V-tolerant), dedicated VDDA/VSSA analog supply pins, separate VBAT for RTC backup, and dedicated SMPS control pins (VDD12, VDD12_IO).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power/ground | Supplies core logic (1.71–3.6 V); decoupling required per STM32L452xx layout guidelines to maintain <100 mV ripple in Stop 2 mode. |
| VDDA, VSSA | Analog domain supply/ground | Independent 1.62–3.6 V supply for ADC/DAC/op-amp; must be filtered and isolated from digital noise to preserve 12-bit ENOB. |
| VBAT | RTC & backup register supply | Accepts 1.65–3.6 V; enables calendar, alarms, and 32×32-bit registers during main power loss - critical for time-stamped event logging. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1 | General-purpose I/Os | 51 pins total; most 5 V-tolerant; support 16 alternate functions including USB D+/D−, SAI, and Quad-SPI - enables flexible board routing and peripheral multiplexing. |
| BOOT0 | Boot mode selection | High at reset forces system memory boot (for DFU); tied low via 10 kΩ resistor for normal Flash execution - essential for field firmware recovery. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl low-power modes | 22 nA Shutdown, 106 nA Standby, 375 nA Standby+RTC, 2.05 µA Stop 2 - enables multi-year battery life in intermittent-sensing IoT endpoints. |
| ART Accelerator™ | Zero-wait-state execution from Flash at 80 MHz - eliminates instruction cache misses in deterministic real-time control loops. |
| Integrated analog subsystem | ADC (5 Msps), dual DAC, op-amp with PGA, dual comparators, VREFBUF - replaces 4–5 discrete analog ICs in sensor node signal chains. |
| Crystal-less USB 2.0 FS | Internal 48 MHz RC trimmed by LSE (±0.25%) - removes external crystal and load capacitors, reducing BOM cost and PCB area by ~3 mm². |
| Batch Acquisition Mode (BAM) | Permits CPU sleep while peripherals autonomously acquire and pre-process sensor data - cuts active processing time by up to 70% in duty-cycled monitoring. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Wearable ECG patch acquiring biopotential signals at 1 kHz with on-device R-peak detection and Bluetooth LE transmission every 30 seconds. IC Role / Device Role / Timing Role: Main controller executing real-time QRS detection, managing ADC oversampling, driving low-power BLE interface, and scheduling ultra-low-power Stop 2 wakeups. Use Value: 2.05 µA Stop 2 current and 4 µs wakeup enable >3-year CR2032 battery life; integrated op-amp and PGA condition microvolt-level ECG signals without external instrumentation amps. |
Use Scenario: Ruggedized environmental logger recording temperature, humidity, and vibration every 5 minutes in remote substations, powered by solar-charged LiFePO₄. IC Role / Device Role / Timing Role: Central data aggregator with RTC timestamping, SDMMC file logging, and LPUART wake-on-event for maintenance alerts. Use Value: External SMPS support (36 µA/MHz) maximizes energy harvesting efficiency; Quad-SPI interface enables fast firmware updates from external flash; VBAT retention preserves last known state during grid outages. |
| Smart Building Controllers | Audio-Enabled Edge Nodes |
Use Scenario: Battery-powered occupancy sensor fusing PIR, ambient light, and acoustic event detection to trigger HVAC and lighting in office spaces. IC Role / Device Role / Timing Role: Multi-sensor fusion hub using TSC for touch UI, comparators for acoustic thresholding, and timers for synchronized sampling windows. Use Value: 21-channel capacitive sensing supports proximity-based UI; ultra-low-power comparators detect sound bursts at <1 µA quiescent current; Stop 2 mode ensures <10 µA average system current. |
Use Scenario: Voice-controlled smart thermostat with local keyword spotting, microphone biasing, and audio output to piezo buzzer or small speaker. IC Role / Device Role / Timing Role: Audio processor running TinyML inference, driving SAI interface to MEMS mic, generating tone via DAC, and managing USB audio class for configuration. Use Value: SAI interface supports I²S/TDM for multi-mic arrays; dual DAC channels enable stereo tone generation or analog feedback; 12-bit ADC oversampling achieves SNR >70 dB for voice preprocessing. |
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 | 512 KB Flash, 128 KB SRAM, no SMPS support, higher active current (84 µA/MHz LDO mode) | Better suited for mains-powered applications requiring larger code footprint and no external SMPS integration | Select when Flash headroom >256 KB is needed and external DC-DC is not feasible; avoid if sub-µA Stop modes are mandatory. |
| STM32U575ZIT6 | ARMv8-M TrustZone, 2 MB Flash, 786 KB SRAM, 1.4 µA Stop 2, but LQFP100-only, no SAI or USB crystal-less | Targets security-critical applications (e.g., secure gateways) where TrustZone isolation outweighs audio/USB convenience | Choose only when PSA Certified firmware isolation is required; not drop-in due to pin count, package, and peripheral mismatch. |
Compared with STM32L476RG, the STM32L452RCT6 offers 36 µA/MHz SMPS efficiency and crystal-less USB - critical for compact battery systems - while the STM32U575ZIT6 trades analog/audio features for security and lower Stop 2 current, demanding PCB redesign and firmware re-architecting.
Availability
STM32L452RCT6 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, smart building controllers, and audio-enabled edge nodes requiring stable component supply across extended product lifecycles.
Supply support for STM32L452RCT6 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, designing and manufacturing microcontrollers, power management ICs, and analog/mixed-signal 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 performance - optimized for sensor nodes, wearables, and energy-harvesting systems.
FAQ
What is the maximum operating frequency and how is it achieved?
The STM32L452RCT6 achieves 80 MHz maximum CPU frequency using its internal multispeed oscillator auto-trimmed by the 32 kHz LSE, or via external 4–48 MHz crystal. The Adaptive Real-time Accelerator (ART Accelerator™) enables zero-wait-state execution from Flash memory at this speed, eliminating instruction fetch bottlenecks without requiring external RAM or cache.
Does STM32L452RCT6 support external SMPS, and what are the benefits?
Yes - it supports external SMPS via dedicated VDD12 and VDD12_IO pins. When enabled, SMPS reduces active-mode current to 36 µA/MHz (vs. 84 µA/MHz in LDO mode), cutting power consumption by over 57% at 80 MHz. This directly extends battery life in portable applications and improves thermal performance in sealed enclosures.
How many analog-to-digital converter channels does it have, and what is their resolution?
The device integrates one 12-bit ADC with up to 16 input channels, capable of 5 Msps sampling rate. Hardware oversampling allows effective resolution up to 16 bits at reduced rates (e.g., 12-bit @ 5 Msps or 16-bit @ 125 ksps), with dedicated analog supply (VDDA/VSSA) and internal reference (2.048 V or 2.5 V) for precision measurement.
Is USB functionality available without an external crystal?
Yes - the STM32L452RCT6 includes a crystal-less USB 2.0 full-speed interface. Its internal 48 MHz RC oscillator is continuously calibrated by the 32 kHz LSE, achieving ±0.25% accuracy - sufficient for USB specification compliance without external crystal or load capacitors, reducing BOM cost and PCB footprint.
STM32L452RCT6 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
- Number of I/O:
- 52
- Program Memory Size:
- 256KB (256K 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:
STM32L452RCT6 FAQ
1.How can I place an order for STM32L452RCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L452RCT6 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 STM32L452RCT6 reliable?
The price and inventory of STM32L452RCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L452RCT6 is usually 5 days.
3.What payment methods are accepted for STM32L452RCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L452RCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L452RCT6?
STM32L452RCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L452RCT6 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 STM32L452RCT6?
For technical support, including STM32L452RCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L452RCT6 requirements.
6.How does Aetrix verify that STM32L452RCT6 is sourced from the original manufacturer or authorized distributors?
All STM32L452RCT6 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 STM32L452RCT6 meets industry standards.
7.What is the process for return or replacement of STM32L452RCT6?
All STM32L452RCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L452RCT6, 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 STM32L452RCT6 part is unused and in its original packaging.
Return procedure for STM32L452RCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L452RCT6 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
