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STMicroelectronics STM32L451CCU3
- Part No.:
- STM32L451CCU3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32L451CCU3.pdf
- Description:
- IC MCU 32BIT 256KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,397
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Product details
Overview
STM32L451CCU3 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 ultra-low-power comparators. It supports CAN 2.0B, SAI audio interface, and LPUART for battery-powered IoT sensor nodes and portable medical devices.
For engineers reviewing the STM32L451CCU3 datasheet, STM32L451CCU3 pinout, STM32L451CCU3 application, or STM32L451CCU3 equivalent, key selection criteria include its 375 nA Standby-with-RTC current, 4 µs Stop-mode wakeup, ART Accelerator™ enabling zero-wait-state Flash execution, and UFBGA64 (5×5 mm) package with 51 I/Os - critical for space-constrained, energy-sensitive embedded designs.
Technical Context
The STM32L451CCU3 implements an Adaptive Real-time Accelerator (ART Accelerator™) that eliminates Flash wait states at 80 MHz, enabling deterministic real-time performance. Its FlexPowerControl architecture integrates multiple low-power modes - including Shutdown (22 nA), Standby with RTC (375 nA), and Stop 2 (2.05 µA) - managed via hardware-controlled voltage scaling and autonomous peripheral clock gating.
It features dual PLLs (system and audio), a dedicated SAI interface supporting I²S/PCM, and a full-featured analog subsystem: one 12-bit ADC with hardware oversampling up to 16-bit effective resolution, two 12-bit DACs with sample-and-hold, one op-amp with programmable gain amplifier (PGA), and two ultra-low-power comparators - all supplied from independent analog rails for noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP and control algorithms without external co-processors. |
| Memory | 256 KB Flash (single-bank), 160 KB SRAM (32 KB with parity) - sufficient for secure firmware + data logging in edge nodes. |
| Low-Power Performance | 375 nA Standby with RTC active - maintains timekeeping and wake-up capability during multi-year battery operation. |
| Analog Peripherals | 1× 12-bit 5 Msps ADC (200 µA/Msps), 2× 12-bit DACs, 1× op-amp with PGA, 2× comparators - supports sensor signal conditioning and analog feedback loops. |
| Communication | CAN 2.0B, SAI (I²S/PCM), 4× I²C FM+, 3× USART, LPUART, Quad SPI - enables mixed-signal connectivity in industrial and audio edge devices. |
| Package & I/O | UFBGA64 (5×5 mm, 0.5 mm pitch), 51 GPIOs (most 5 V-tolerant) - compact footprint suitable for wearable and portable equipment. |
| Security & Debug | True RNG, CRC unit, 96-bit unique ID, SWD/JTAG, ETM - meets basic firmware integrity and traceability requirements for certified medical and industrial use. |
Pinout & Package
STM32L451CCU3 is housed in a 64-pin Ultra-Fine Pitch Ball Grid Array (UFBGA64) package measuring 5 mm × 5 mm with 0.5 mm ball pitch. This RoHS-compliant, ECOPACK2®-certified package supports high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | 1.71–3.6 V digital core supply; decoupling required per STM32L451xx layout guidelines to ensure stable low-power operation. |
| VDDA, VSSA | Analog power and ground | Independent 1.71–3.6 V analog rail - isolates ADC/DAC/OPAMP noise from digital switching transients. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | 51 total GPIOs; most support 5 V tolerance, multiple alternate functions (AF0–AF15), and fast toggle (up to 80 MHz). |
| NRST | Active-low reset input | Asynchronous reset pin; internal pull-up; compatible with external reset supervisors and push-button recovery circuits. |
| BOOT0 | Boot mode selection | High at power-up selects system memory boot (for bootloader loading); tied low for normal Flash execution. |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Supports 4–48 MHz external crystals; essential for precise timing in USB, CAN, and audio applications requiring low jitter. |
| LSE_IN / LSE_OUT | 32.768 kHz RTC crystal interface | Enables calendar RTC with ±20 ppm accuracy and sub-microamp retention current in VBAT mode. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Delivers 22 nA Shutdown, 375 nA Standby-with-RTC, and 2.05 µA Stop 2 - extends battery life in always-on sensing endpoints. |
| ART Accelerator™ | Enables 0-wait-state execution from Flash at 80 MHz - eliminates instruction cache misses and improves deterministic latency for real-time control. |
| Dual PLL system | Separate PLLs for CPU/system clock (up to 80 MHz) and audio clock (up to 48 MHz) - avoids clock domain interference in SAI-driven audio processing. |
| Capacitive touch sensing (TSC) | 21-channel controller supporting touchkey, linear, and rotary sensors - enables intuitive HMI without external ICs in portable medical or home appliance UIs. |
| Batch Acquisition Mode (BAM) | Allows peripherals to operate autonomously while CPU remains in low-power state - reduces active time for periodic sensor polling tasks. |
Applications
| Wearable Health Monitor | Smart Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition and local anomaly detection in wrist-worn devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary MCU executing real-time filtering, ADC oversampling, and BLE packet preparation; RTC maintains timestamped logs. Use Value: 375 nA Standby-with-RTC and 4 µs Stop-mode wakeup enable >2-year battery life while preserving time-critical event logging. | Use Scenario: Wireless vibration/temperature node on rotating machinery, transmitting data via LoRaWAN or NB-IoT gateways. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating data from MEMS accelerometers and thermistors; CAN interface used for local diagnostics bus. Use Value: Dual PLLs isolate audio-grade clocks for precision timing; 51 GPIOs support flexible sensor interface expansion and debug headers. |
| Portable Audio Recorder | Low-Power Smart Meter |
Use Scenario: Battery-operated voice recorder with line-in, microphone preamp, and stereo playback via SAI-driven DACs. IC Role / Device Role / Timing Role: Audio processor handling I²S input/output, op-amp-based microphone biasing, and SAI FIFO management. Use Value: Integrated SAI, dual DACs, and op-amp with PGA eliminate need for external audio codecs - reducing BOM cost and board area. | Use Scenario: AMI (Advanced Metering Infrastructure) endpoint collecting kWh, voltage, and current data with tamper detection and secure firmware updates. IC Role / Device Role / Timing Role: Secure host controller managing AES encryption, RTC-based billing intervals, and isolated analog front-end sampling. Use Value: True RNG, 96-bit UID, and Flash readout protection (RDP Level 2) satisfy IEC 62056 and DLMS/COSEM security mandates. |
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 |
|---|---|---|---|
| STM32L431RCY6 | Same core, 256 KB Flash, but only 64 KB SRAM; no SAI, no CAN; UFBGA64 package identical. | Lacks audio and CAN interfaces - unsuitable for voice recorders or industrial fieldbus integration. | Select when audio/CAN are unnecessary and cost reduction is prioritized over peripheral flexibility. |
| STM32L552REY6Q | ARMv8-M TrustZone®, 512 KB Flash, 256 KB SRAM, 2x SAIs, same UFBGA64; higher active current (3.1 µA/MHz). | Hardware security extension adds ~15% die area and complexity; targets certified secure firmware deployments. | Choose only when PSA Certified Level 2 or Common Criteria EAL4+ compliance is mandatory. |
Compared with STM32L431RCY6, the STM32L451CCU3 adds SAI and CAN at identical package size and price point - making it optimal for audio-aware or fieldbus-connected edge nodes. Versus STM32L552REY6Q, it trades TrustZone® for lower power and simpler certification paths - ideal for cost- and energy-sensitive industrial OEMs.
Availability
STM32L451CCU3 is available at Aetrix Electronics and suitable for wearable health monitors, smart industrial sensor nodes, portable audio recorders, and low-power smart meters requiring stable component supply across multi-year production cycles.
Supply support for STM32L451CCU3 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 analog components 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-efficient industrial controls.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L451CCU3 operates at up to 80 MHz with ART Accelerator™ enabled. At this frequency, typical Run mode current is 84 µA/MHz (6.72 mA total) with code executing from Flash and peripherals active - verified per DS11910 Rev 5 Table 27 under VDD = 3.3 V, Tj = 25 °C.
Does STM32L451CCU3 support hardware cryptographic acceleration?
No, the STM32L451CCU3 does not include dedicated crypto accelerators (AES, PKA, HASH). It relies on software libraries for encryption; however, it integrates a true random number generator (RNG) and CRC calculation unit to support secure firmware signing and data integrity checks.
Which development tools are officially supported for STM32L451CCU3?
STMicroelectronics officially supports STM32CubeIDE (free Eclipse-based IDE), STM32CubeMX (graphical initialization tool), and ST-LINK/V2-1 debug probes. The device is also compatible with third-party tools including Keil MDK-ARM and IAR Embedded Workbench, with full HAL and LL driver support in STM32CubeL4 firmware package.
Can the internal op-amp be used to drive a 50 Ω load directly?
No - the integrated op-amp is specified for rail-to-rail output swing with 60 mA short-circuit current and 100 kHz unity-gain bandwidth, but its output stage cannot sustain continuous 50 Ω loads. For such impedance, external buffer amplifiers (e.g., TSX912IDT) are required per AN4911 design recommendations.
STM32L451CCU3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- 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, QSPI, SAI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 38
- 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 10x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L451CCU3 FAQ
1.How can I place an order for STM32L451CCU3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L451CCU3 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 STM32L451CCU3 reliable?
The price and inventory of STM32L451CCU3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L451CCU3 is usually 5 days.
3.What payment methods are accepted for STM32L451CCU3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L451CCU3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L451CCU3?
STM32L451CCU3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L451CCU3 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 STM32L451CCU3?
For technical support, including STM32L451CCU3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L451CCU3 requirements.
6.How does Aetrix verify that STM32L451CCU3 is sourced from the original manufacturer or authorized distributors?
All STM32L451CCU3 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 STM32L451CCU3 meets industry standards.
7.What is the process for return or replacement of STM32L451CCU3?
All STM32L451CCU3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L451CCU3, 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 STM32L451CCU3 part is unused and in its original packaging.
Return procedure for STM32L451CCU3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L451CCU3 Tags
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ATTINY4-TSHR
Microchip Technology
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ATTINY10-TSHR
Microchip Technology
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ATTINY10-TS8R
Microchip Technology
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ATTINY202-SSNR
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ATTINY202-SSFR
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ATTINY402-SSNR
Microchip Technology
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PIC16F15213T-I/MF
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PIC16F15213-E/MF
Microchip Technology
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PIC10F200T-I/OT
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ATTINY412-SSNR
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PIC10F202T-I/OT
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ATTINY404-SSNR
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