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STMicroelectronics STM32L451RCI6
- Part No.:
- STM32L451RCI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32L451RCI6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,654
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Product details
Overview
STM32L451RCI6 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. It targets battery-powered IoT edge nodes requiring real-time audio processing, sensor fusion, and secure firmware execution.
For engineers reviewing the STM32L451RCI6 datasheet, STM32L451RCI6 pinout, STM32L451RCI6 application, or STM32L451RCI6 equivalent, key selection criteria include its 2.05 µA Stop 2 mode current, 4 µs wakeup latency, LPUART/SAI audio interface support, and UFBGA64 (5×5 mm) package with 64 I/Os - critical for compact, energy-constrained embedded designs.
Technical Context
The STM32L451RCI6 integrates an Adaptive Real-Time Accelerator (ART™) enabling zero-wait-state execution from Flash at 80 MHz, paired with a Memory Protection Unit (MPU) and proprietary code readout protection. Its power architecture includes five low-power modes (Shutdown, Standby, Stop 0–2), with VBAT-supplied RTC and 32×32-bit backup registers retained in 145 nA mode.
It features dual PLLs - one for system clock (up to 80 MHz), another dedicated to audio clocking - alongside a 48 MHz HSI48 oscillator with clock recovery, supporting SAI-based audio streaming without external crystal. The interconnect matrix enables concurrent peripheral access with deterministic latency.
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 sensor fusion in resource-constrained edge devices. |
| Memory | 256 KB Flash (single-bank), 160 KB SRAM (32 KB with parity) - supports secure boot, OTA updates, and large buffer storage for audio/sensor data. |
| Power Modes | 2.05 µA Stop 2 mode, 375 nA Standby+RTC - extends coin-cell battery life to multi-year operation in always-on monitoring applications. |
| Analog Peripherals | 12-bit 5 Msps ADC (with 16-bit oversampling), 2×12-bit DACs, 1 OPAMP + PGA, 2 comparators - enables high-fidelity sensor signal conditioning and analog output control. |
| Communication | 1×SAI, 4×I²C (FM+), 4×USART/LPUART, 3×SPI + Quad-SPI, CAN 2.0B - supports simultaneous audio streaming, sensor networking, and industrial bus connectivity. |
| Package | UFBGA64 (5×5 mm, 0.5 mm pitch) - provides high I/O density (up to 64 GPIOs, most 5 V-tolerant) in space-limited PCB layouts. |
| Security | True RNG, CRC unit, 96-bit unique ID, Firewall, ROP level 2 - meets baseline requirements for firmware integrity and cryptographic key generation. |
Pinout & Package
STM32L451RCI6 uses a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package with 0.5 mm ball pitch and 5×5 mm body size, optimized for automated assembly and thermal performance in compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | 1.71–3.6 V operation; separate analog/digital domains enable noise-isolated precision sensing. |
| VREF+, VREF− | ADC/DAC reference inputs | Support external 2.048 V or 2.5 V reference for ±0.5 LSB INL accuracy in measurement-critical applications. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | Up to 64 GPIOs, most 5 V-tolerant - simplifies level-shifting with legacy peripherals and sensors. |
| PA9/PA10, PB6/PB7, PB10/PB11 | USART/TX/RX alternate functions | Hardware flow control and IrDA/LIN/ISO 7816 support - enables direct connection to smart cards, modems, and automotive ECUs. |
| PC7–PC10, PD8–PD11 | SAI1 serial audio interface | Dual half-duplex or single full-duplex I²S/PCM channel - drives MEMS microphones or connects to audio codecs without external bridge logic. |
| PF0–PF1 | TSC input channels | Capacitive touch sensing on up to 21 channels - implements touchkey, slider, or rotary controls with <1 µA active current. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic voltage scaling and mode transitions (e.g., Run → Stop 2 in <5 µs) to match real-time workload demands while minimizing average current draw. |
| ART Accelerator™ | Eliminates Flash wait states at 80 MHz, reducing instruction fetch latency by >40% versus cacheless execution - critical for deterministic motor control loops. |
| Batch Acquisition Mode (BAM) | Permits CPU sleep during ADC/DAC burst sequences, cutting active core time by up to 70% in sensor sampling routines. |
| Hardware touch controller (TSC) | Offloads capacitive sensing computation from CPU, achieving <100 µs scan time per channel with built-in desaturation and noise filtering. |
| Dual PLL system | Separates audio clock domain (SAI PLL) from system clock - prevents jitter coupling between CPU activity and audio playback fidelity. |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition, local feature extraction, and BLE transmission in wrist-worn device powered by CR2032 battery. IC Role / Device Role / Timing Role: Main application processor executing sensor fusion algorithms, managing ultra-low-power sleep/wakeup cycles, and driving analog front-end via ADC/DAC/OPAMP. Use Value: 2.05 µA Stop 2 mode and 4 µs wakeup ensure >2-year battery life while maintaining sub-100 ms response to motion-triggered measurements. | Use Scenario: Tamper-resistant electricity meter with metrology-grade sampling, secure firmware updates, and PLC/GPRS communication. IC Role / Device Role / Timing Role: System controller handling real-time energy calculation, cryptographic signature verification, and dual-interface (CAN + UART) data reporting. Use Value: Hardware CRC, true RNG, and ROP-level 2 protect against firmware cloning and replay attacks; CAN 2.0B enables interoperability with legacy grid infrastructure. |
| Industrial Wireless Sensor Node | Audio-Enabled Smart Home Hub |
Use Scenario: Battery-operated vibration/temperature node transmitting predictive maintenance data over LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Low-power host MCU acquiring analog sensor data via 12-bit ADC, performing FFT-based spectral analysis, and managing RF transceiver timing. Use Value: 106 nA Standby mode with 5 wakeup pins allows indefinite dormancy; hardware DFSDM prefiltering reduces CPU load by 3× during raw sigma-delta sensor interfacing. | Use Scenario: Voice-controlled home hub with far-field microphone array, local wake-word detection, and audio playback via I²S-connected DAC. IC Role / Device Role / Timing Role: Audio subsystem controller managing SAI-driven PDM microphones, hardware-accelerated audio preprocessing, and low-jitter DAC output. Use Value: Dual PLL isolation ensures <50 ps RMS jitter on SAI clocks; integrated OPAMP + PGA enables direct MEMS mic biasing and gain staging without external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power Cortex-M4 MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L476RGV6 | 512 KB Flash, 128 KB SRAM, no SAI, adds USB OTG FS and LCD-TFT controller | Better suited for HMI-rich applications (e.g., graphical displays); lacks native audio interface required for microphone array processing | Select when display interface or USB device functionality outweighs audio capability and power efficiency. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB Flash, 256 KB RAM, 1.4 µA EM2 mode, no integrated DAC/SAI | Superior deep-sleep current but requires external audio codec; lacks hardware touch controller and analog opamp | Prefer for longest battery life where audio is handled externally and capacitive touch is unnecessary. |
Compared with STM32L476RGV6 and EFM32PG12B500F1024GL125, the STM32L451RCI6 uniquely balances ultra-low active/standby current, integrated audio peripherals (SAI, DAC, OPAMP), and capacitive touch - making it optimal for compact, battery-powered edge devices requiring mixed-signal autonomy.
Availability
STM32L451RCI6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and audio-enabled smart home hubs requiring stable component supply across long production lifecycles.
Supply support for STM32L451RCI6 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 ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, combining Cortex-M4 processing with advanced analog integration and security features for IoT edge intelligence.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L451RCI6 operates at up to 80 MHz with ART Accelerator enabled. At 80 MHz and 3.3 V supply, typical Run mode current is 84 µA/MHz (6.72 mA total), measured with code executing from Flash and ART cache enabled - verified per Table 27 of DS11910 Rev 5.
Does STM32L451RCI6 support hardware encryption or secure boot features?
It includes a true random number generator (RNG), CRC calculation unit, and 96-bit unique ID - foundational for cryptographic operations. While it lacks dedicated AES/SHA accelerators, its ROP Level 2 and Firewall support secure boot implementation via software libraries (e.g., Mbed TLS) validated for PSA Level 1 certification.
Can the internal 12-bit DAC drive headphones or speakers directly?
No - the DAC outputs are low-power sample-and-hold buffers rated for ≤100 µA load. Driving headphones (typically 16–32 Ω) requires external amplification. The integrated OPAMP with programmable gain can be configured as a headphone driver stage, but full audio output needs additional Class AB or D amplifier circuitry.
What debug interfaces are supported, and is SWD sufficient for full development?
It supports Serial Wire Debug (SWD) and JTAG via the SWJ-DP interface. SWD is fully sufficient for programming, real-time debugging, and trace (via ETM) - all standard IDEs (STM32CubeIDE, Keil, IAR) use SWD as the default. No external JTAG adapter is needed unless legacy toolchain compatibility is required.
STM32L451RCI6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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
- 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:
STM32L451RCI6 FAQ
1.How can I place an order for STM32L451RCI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L451RCI6 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 STM32L451RCI6 reliable?
The price and inventory of STM32L451RCI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L451RCI6 is usually 5 days.
3.What payment methods are accepted for STM32L451RCI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L451RCI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L451RCI6?
STM32L451RCI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L451RCI6 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 STM32L451RCI6?
For technical support, including STM32L451RCI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L451RCI6 requirements.
6.How does Aetrix verify that STM32L451RCI6 is sourced from the original manufacturer or authorized distributors?
All STM32L451RCI6 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 STM32L451RCI6 meets industry standards.
7.What is the process for return or replacement of STM32L451RCI6?
All STM32L451RCI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L451RCI6, 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 STM32L451RCI6 part is unused and in its original packaging.
Return procedure for STM32L451RCI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L451RCI6 Tags
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ATTINY4-TSHR
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PIC10F200T-I/OT
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