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STMicroelectronics STM32L452RCY6TR
- Part No.:
- STM32L452RCY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA, WLCSP
- Datasheet:
-
STM32L452RCY6TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,656
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Product details
Overview
STM32L452RCY6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 256 KB Flash, 64 KB SRAM, and integrated analog peripherals including a 12-bit 5 Msps ADC, dual 12-bit DACs, and hardware-accelerated crypto. It supports USB 2.0 full-speed (crystal-less), SAI audio interface, and CAN 2.0B - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L452RCY6TR datasheet, STM32L452RCY6TR pinout, STM32L452RCY6TR application, or STM32L452RCY6TR equivalent, key selection criteria include verified ultra-low-power run/stop modes (36 µA/MHz @ SMPS), 5 V-tolerant I/O count (up to 83), RTC with HW calendar, and UFBGA64 (5×5 mm) package compatibility with space-constrained PCB layouts.
Technical Context
This MCU implements FlexPowerControl architecture with dual voltage regulation options: internal LDO or external SMPS for optimized efficiency. Its ART Accelerator™ enables zero-wait-state execution from Flash at 80 MHz, while the interconnect matrix decouples bus arbitration for deterministic peripheral access during low-power operation.
The device integrates independent analog supplies (VDDA/VREF+), enabling simultaneous high-precision ADC sampling (200 µA/Msps) and DAC output with built-in sample-and-hold, alongside two ultra-low-power comparators and one operational amplifier with programmable gain amplifier (PGA) - all functional down to Stop 2 mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max frequency → real-time signal processing & floating-point math without external coprocessor |
| Memory | 256 KB Flash + 64 KB SRAM (32 KB with parity) → sufficient for secure bootloader + BLE stack + sensor fusion firmware |
| Power Modes | 36 µA/MHz (SMPS Run), 375 nA Standby+RTC → enables >5-year battery life in coin-cell-powered IoT endpoints |
| Analog Peripherals | 12-bit 5 Msps ADC (hardware oversampling to 16-bit), 2×12-bit DACs → supports high-fidelity sensor acquisition and analog actuator control |
| Communication | USB 2.0 FS (crystal-less), CAN 2.0B, SAI, 4×I²C, 4×USART → enables mixed-signal edge node with wired/wireless connectivity and audio feedback |
| I/O | Up to 83 fast I/Os, most 5 V-tolerant → simplifies level-shifting in multi-rail industrial systems |
| Package | UFBGA64 (5×5 mm, 0.5 mm pitch) → compact footprint for wearable and handheld form factors |
Pinout & Package
UFBGA64 package (5×5 mm, 0.5 mm pitch), 0.6 mm height, ECOPACK2® compliant, suitable for automated optical inspection and fine-pitch reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VREF+ | Analog/digital power supply rails | Independent VDDA/VREF+ allows clean analog reference for ADC/DAC even when digital domain is under dynamic load |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 83 total GPIOs; majority 5 V-tolerant → direct interfacing with legacy 5 V logic without level shifters |
| PC13–PC15 | RTC oscillator pins | Supports 32.768 kHz crystal for autonomous calendar/timekeeping during VBAT-only operation |
| PA11/PA12 | USB D+/D− | Crystal-less USB 2.0 FS interface → eliminates external 48 MHz crystal, reducing BOM cost and board area |
| PB8/PB9 | CAN_RX/CAN_TX | Dedicated CAN 2.0B transceiver interface → robust fieldbus communication for industrial automation nodes |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic switching between LDO and external SMPS, achieving 36 µA/MHz efficiency at 3.3 V - critical for energy harvesting designs |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz → deterministic real-time response without SRAM code shadowing |
| Batch Acquisition Mode (BAM) | Permits CPU sleep while peripherals autonomously acquire sensor data → extends battery life in periodic monitoring applications |
| Hardware crypto acceleration | Includes AES-128/256, HASH (SHA-256), and PKA (RSA/ECC) engines → enables secure OTA updates without software overhead |
| True random number generator (RNG) | FIPS-compliant entropy source → essential for TLS handshake and secure key generation in connected devices |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG and SpO₂ sensing with Bluetooth LE telemetry and local display. IC Role / Device Role / Timing Role: Main application processor managing sensor acquisition (ADC/DAC), real-time signal processing (Cortex-M4+FPU), and USB/SAI audio feedback. Use Value: 375 nA Standby+RTC and BAM enable multi-week operation on CR2032; 5 Msps ADC resolves microvolt-level biopotentials. | Use Scenario: Tamper-resistant electricity meter with pulse counting, LCD drive, and PLC/GPRS backhaul. IC Role / Device Role / Timing Role: System-on-chip controller handling metrology (ADC oversampling), secure billing (crypto), and communication (CAN/UART/LPUART). Use Value: 145 nA VBAT mode preserves RTC and backup registers during main power loss; 5 V-tolerant I/Os interface directly with optocoupled pulse inputs. |
| Portable Gas Detector | Industrial Edge Gateway |
Use Scenario: Battery-powered CO/H₂S detection with electrochemical sensors, buzzer alarm, and LoRaWAN uplink. IC Role / Device Role / Timing Role: Low-power host MCU performing analog front-end conditioning (OPAMP+COMP), gas concentration calculation, and LPUART wake-up from Stop 2. Use Value: 22 nA Shutdown mode with 5 wakeup pins ensures instant response to sensor threshold events; internal 2.048 V VREFBUF guarantees stable ADC reference across temperature. | Use Scenario: DIN-rail mounted gateway aggregating Modbus RTU field devices and forwarding via Ethernet/Wi-Fi. IC Role / Device Role / Timing Role: Bridge controller running protocol translation (UART-to-TCP), secure boot, and watchdog-monitored CAN bus master. Use Value: Dual PLLs support independent clock domains for USB (48 MHz) and CAN (8 MHz); 160 KB SRAM accommodates multiple concurrent protocol stacks. |
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 |
|---|---|---|---|
| STM32L476RGY6TR | 512 KB Flash, 128 KB SRAM, no SAI, adds Ethernet MAC & LCD-TFT controller | Better suited for HMI-rich gateways; higher memory overhead unnecessary for sensor-edge nodes | Select when needing larger code space or display interface - not recommended for cost-optimized battery devices |
| STM32L552REY6TR | ARM TrustZone®, 320 KB Flash, 256 KB SRAM, enhanced crypto (AES-GCM, SHA-3), 110 µA/MHz Run | Targeted at certified security applications (PSA Level 3); higher active current offsets ultra-low-power advantage | Choose only when hardware-enforced isolation and PSA certification are mandatory - otherwise over-spec'd |
Compared with STM32L476RGY6TR and STM32L552REY6TR, the STM32L452RCY6TR delivers optimal balance of ultra-low active/idle current, integrated analog precision, and compact UFBGA64 packaging - making it the most efficient choice for battery-limited sensor endpoints where security and display are secondary.
Availability
STM32L452RCY6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable gas detectors, and industrial edge gateways requiring stable component supply across multi-year production cycles.
Supply support for STM32L452RCY6TR 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 ICs, sensors, and analog products 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 IoT edge nodes, portable medical devices, and energy-conscious industrial controls.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32L452RCY6TR operates at up to 80 MHz with an Adaptive Real-Time Accelerator (ART) enabling zero-wait-state Flash execution. Its performance is rated at 100 DMIPS (Dhrystone 2.1), validated at 1.25 DMIPS/MHz. This is confirmed in Section 2.2 of DS11912 Rev 7 and supported by CoreMark® scores of 273.55 at 80 MHz (3.42 CoreMark/MHz).
Does this MCU support crystal-less USB operation, and what are the requirements?
Yes, the STM32L452RCY6TR supports USB 2.0 Full-Speed operation without an external crystal via its integrated Clock Recovery System (CRS). It requires only the internal 48 MHz RC oscillator trimmed by the 32 kHz LSE, eliminating the need for a 48 MHz crystal. This is documented in Section 3.33 and Table 13 of DS11912 Rev 7.
How many I/O pins are 5 V-tolerant, and which packages support them?
Up to 83 I/Os are 5 V-tolerant, including all GPIOs except those dedicated to JTAG/SWD debug (PA13/PA14) and certain analog inputs. This applies uniformly across all packages, including the UFBGA64 (STM32L452RCY6TR's package), as specified in Section 3.12 and Table 16 of DS11912 Rev 7.
What low-power modes include RTC functionality, and what is the typical current draw?
The STM32L452RCY6TR supports RTC operation in Standby mode (375 nA typical) and Stop 2 mode (2.40 µA typical with RTC enabled). Both retain VBAT-supplied RTC and 32×32-bit backup registers. These values are measured per Section 6.3.5 and Table 4 of DS11912 Rev 7 under standard conditions (VDD = 3.3 V, T = 25 °C).
STM32L452RCY6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA, WLCSP
- Series:
- STM32L4
- Packaging:
- Tape & Reel (TR)
- 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:
STM32L452RCY6TR FAQ
1.How can I place an order for STM32L452RCY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L452RCY6TR 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 STM32L452RCY6TR reliable?
The price and inventory of STM32L452RCY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L452RCY6TR is usually 5 days.
3.What payment methods are accepted for STM32L452RCY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L452RCY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L452RCY6TR?
STM32L452RCY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L452RCY6TR 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 STM32L452RCY6TR?
For technical support, including STM32L452RCY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L452RCY6TR requirements.
6.How does Aetrix verify that STM32L452RCY6TR is sourced from the original manufacturer or authorized distributors?
All STM32L452RCY6TR 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 STM32L452RCY6TR meets industry standards.
7.What is the process for return or replacement of STM32L452RCY6TR?
All STM32L452RCY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L452RCY6TR, 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 STM32L452RCY6TR part is unused and in its original packaging.
Return procedure for STM32L452RCY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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