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STMicroelectronics STM32L451RCY6TR
- Part No.:
- STM32L451RCY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA, WLCSP
- Datasheet:
-
STM32L451RCY6TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,685
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Product details
Overview
STM32L451RCY6TR 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, 160 KB SRAM, and integrated analog peripherals including a 12-bit 5 Msps ADC, dual 12-bit DACs, and hardware-accelerated capacitive touch sensing - deployed in battery-powered IoT sensor nodes requiring long runtime and real-time signal processing.
For engineers reviewing the STM32L451RCY6TR datasheet, STM32L451RCY6TR pinout, STM32L451RCY6TR application, or STM32L451RCY6TR equivalent, key selection criteria include verified Stop 2 mode current (375 nA with RTC), 5 V-tolerant I/O count (up to 51), UFBGA64 package footprint compatibility, and CAN 2.0B interface support for industrial edge devices.
Technical Context
The device implements FlexPowerControl architecture with seven low-power modes, including Shutdown (22 nA), Standby with RTC (375 nA), and Stop 2 (2.40 µA with RTC), enabled by independent voltage regulators and dynamic voltage scaling. Its ART Accelerator™ delivers zero-wait-state execution from Flash at 80 MHz.
Core peripherals include dual PLLs (system/audio), SAI for audio streaming, LPUART for sub-millisecond wake-up from Stop 2, and a dedicated DFSDM for sigma-delta sensor interfacing - all coordinated via an interconnect matrix supporting concurrent DMA transfers without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, enabling real-time filtering and motor control algorithms |
| Max Clock Frequency | 80 MHz with ART Accelerator™ - sustains 100 DMIPS performance without external RAM or cache |
| Memory | 256 KB Flash (single-bank, code readout protection), 160 KB SRAM (32 KB with hardware parity) |
| Ultra-Low-Power Modes | Stop 2 mode draws 2.40 µA with RTC active; 4 µs wake-up time enables rapid sensor polling cycles |
| Analog Peripherals | 12-bit ADC @ 5 Msps (200 µA/Msps), 2× 12-bit DACs, 2× ultra-low-power comparators, 1 op-amp with PGA |
| Communication Interfaces | 1× CAN 2.0B, 4× I²C FM+, 3× USART, 1× LPUART, 1× SAI, 3× SPI + Quad-SPI, SDMMC, IRTIM |
| I/O Count & Tolerance | 51 fast I/Os in UFBGA64 package; most pins 5 V-tolerant - simplifies level-shifting in mixed-voltage systems |
Pinout & Package
STM32L451RCY6TR is housed in a 5 × 5 mm UFBGA64 package (0.5 mm pitch) with 64 solder balls, optimized for space-constrained portable and wearable designs. Pin functions are validated per STMicroelectronics DS11910 Rev 5, Section 4 ("Pinouts and pin description").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O power supplies | Independent domains allow analog precision and I/O flexibility; VDDIO2 supports 1.65–3.6 V for 5 V-tolerant operation |
| VSS, VSSA | Digital and analog ground returns | Separate analog/digital ground planes reduce noise coupling into ADC/DAC paths |
| PA0–PA15, PB0–PB15, PC0–PC15, PD2, PF0–PF1 | General-purpose I/Os with multiple alternate functions | 51 user-configurable pins support GPIO, UART, SPI, I²C, timers, and capacitive touch sensing (TSC) |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external push-button or supervisor ICs |
| BOOT0 | Boot mode selection | High at power-up selects system memory bootloader; used for field firmware recovery |
| SWCLK, SWDIO | Serial Wire Debug interface | 2-pin debug port enables programming and real-time trace without JTAG overhead |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 22 nA Shutdown and 375 nA Standby-with-RTC - extends coin-cell battery life to >10 years in metering applications |
| ART Accelerator™ | Eliminates Flash wait states at 80 MHz, reducing active-mode energy per instruction by ~25% vs non-accelerated cores |
| Capacitive Touch Sensing Controller (TSC) | Supports 21 channels for touchkey/linear/rotary sensors without external components - ideal for sealed HMI interfaces |
| Dual 12-bit DACs with sample-and-hold | Enable simultaneous analog waveform generation and sensor calibration reference outputs in portable medical devices |
| SAI + LPUART + CAN combo | Allows concurrent audio streaming, low-power wake-up messaging, and industrial bus communication - critical for edge AI gateways |
Applications
| Smart Utility Meter | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter with hourly pressure/temperature logging and RF transmission. IC Role / Device Role / Timing Role: Primary MCU managing sensor acquisition (ADC + TSC), RTC-based scheduling, LPUART wake-up, and CAN diagnostics. Use Value: 375 nA Standby-with-RTC enables 12+ year battery life; 5 V-tolerant I/Os interface directly with legacy pulse-output meters. | Use Scenario: ECG/PPG patch with continuous biosignal sampling, local feature extraction, and BLE handoff. IC Role / Device Role / Timing Role: Signal-processing hub running CMSIS-DSP filters on ADC data, driving DAC for bioimpedance excitation, and managing SAI-linked audio alerts. Use Value: 2.40 µA Stop 2 mode with RTC preserves context during sleep; integrated op-amp + PGA conditions weak biopotential signals on-chip. |
| Industrial Edge Gateway | Asset Tracking Beacon |
Use Scenario: DIN-rail mounted gateway aggregating Modbus RTU, CAN bus, and analog sensor inputs for cloud telemetry. IC Role / Device Role / Timing Role: Protocol translator and data concentrator using multiple UARTs, CAN controller, and SDMMC for local buffering. Use Value: Dual PLLs isolate audio clock (SAI) from system clock; Quad-SPI supports secure boot from external flash with XIP capability. | Use Scenario: GPS-enabled logistics tag reporting location every 6 hours using LoRaWAN, powered by CR2032. IC Role / Device Role / Timing Role: Low-power host managing GPS UART, accelerometer interrupt wake-up, and LPUART-to-LoRa bridge. Use Value: 4 µs wake-up from Stop 2 minimizes latency in motion-triggered reporting; 145 nA VBAT mode maintains RTC and backup registers during main power loss. |
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 |
|---|---|---|---|
| STM32L431RCY6TR | Same UFBGA64 package, but 256 KB Flash only, no SAI, no DFSDM, no CAN, reduced timer count | Suitable for simpler sensor nodes without audio or sigma-delta sensor needs | Select when CAN/SAI/DFSDM are unnecessary and BOM cost reduction is prioritized |
| STM32L552REY6TR | ARMv8-M TrustZone®, 512 KB Flash, 256 KB SRAM, enhanced crypto accelerators, higher leakage in low-power modes | Required for secure firmware updates, encrypted storage, and PSA Level 1 certification | Choose when hardware root-of-trust and secure boot are mandatory, accepting 2.8 µA Stop 2 current |
Compared with STM32L431RCY6TR, the STM32L451RCY6TR adds CAN and SAI for industrial connectivity and audio, while STM32L552REY6TR trades ultra-low power for security - making the L451 optimal for cost-sensitive, battery-powered edge nodes needing both analog richness and bus interoperability.
Availability
STM32L451RCY6TR is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial edge gateways, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32L451RCY6TR 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, MEMS, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with design focus on battery longevity, rich analog integration, and seamless migration across the STM32 portfolio.
FAQ
What is the maximum operating temperature range for STM32L451RCY6TR?
The STM32L451RCY6TR is rated for operation from –40 °C to +85 °C ambient temperature, validated per DS11910 Rev 5 Section 6.3.1. This industrial-grade range supports deployment in outdoor metering, factory-floor sensors, and automotive cabin modules without derating.
Does STM32L451RCY6TR support hardware encryption acceleration?
No - the STM32L451RCY6TR does not include cryptographic accelerators (AES, PKA, HASH). It relies on software libraries for encryption. For hardware-accelerated crypto, ST recommends the STM32L5x2 or STM32U5xx families, which integrate AES-256, PKA, and secure key storage.
Can the internal 32 kHz RC oscillator replace the external LSE crystal for RTC accuracy?
The internal 32 kHz RC (LSI) has ±5% accuracy and drifts with temperature/voltage - unsuitable for calendar-grade RTC. The external 32.768 kHz crystal (LSE) achieves ±20 ppm accuracy and is required for precise timekeeping; LSI is only recommended for wake-up timing or fallback operation.
Is the UFBGA64 package of STM32L451RCY6TR compatible with reflow soldering per JEDEC J-STD-020?
Yes - the UFBGA64 package (pitch 0.5 mm) is qualified for standard Pb-free reflow per JEDEC J-STD-020D, with peak temperature ≤260 °C. ST specifies MSL3 handling (floor life 168 hours at ≤30 °C/60% RH), and recommends stencil aperture ratio ≥0.66 for reliable solder paste release.
STM32L451RCY6TR 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
- 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:
STM32L451RCY6TR FAQ
1.How can I place an order for STM32L451RCY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L451RCY6TR 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 STM32L451RCY6TR reliable?
The price and inventory of STM32L451RCY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L451RCY6TR is usually 5 days.
3.What payment methods are accepted for STM32L451RCY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L451RCY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L451RCY6TR?
STM32L451RCY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L451RCY6TR 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 STM32L451RCY6TR?
For technical support, including STM32L451RCY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L451RCY6TR requirements.
6.How does Aetrix verify that STM32L451RCY6TR is sourced from the original manufacturer or authorized distributors?
All STM32L451RCY6TR 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 STM32L451RCY6TR meets industry standards.
7.What is the process for return or replacement of STM32L451RCY6TR?
All STM32L451RCY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L451RCY6TR, 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 STM32L451RCY6TR part is unused and in its original packaging.
Return procedure for STM32L451RCY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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