STM32L451CEU6TR STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
The STM32L451CEU6TR is an ultra-low-power 32-bit ARM Cortex-M4 microcontroller from STMicroelectronics running at up to 80 MHz with 512 kB Flash and 160 kB SRAM in a compact UFQFPN-48 package. It integrates rich peripherals and DSP/FPU for IoT and battery-powered embedded applications.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 49
- Lifecycle
- ACTIVE
- Datasheet
- STM32L451CEU6TR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.1371(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- ARM Cortex-M4 core with DSP and FPU running at up to 80 MHz for efficient signal processing in low-power applications
- Ultra-low-power design with Stop 2 mode current as low as 100 nA enabling years of battery life in IoT sensor nodes
- 512 kB Flash and 160 kB SRAM on-chip supporting complex embedded firmware stacks with BLE or communication middleware
- Rich peripheral set including multiple UART, SPI, I2C, USB, and CAN interfaces for versatile connectivity
- Compact UFQFPN-48 QFN package suited for space-constrained wearable and industrial IoT PCB designs
Applications
The STM32L451CEU6TR is designed for ultra-low-power IoT sensor nodes, wearable health monitors, and industrial wireless sensor systems that require high processing performance from a battery-powered device. Its Cortex-M4 DSP and FPU enable on-device sensor fusion, filtering, and machine learning inference on 8 or more sensor channels while maintaining sub-milliamp average current consumption. The device also suits smart building automation controllers, portable medical devices, and energy harvesting applications where Sleep and Stop modes with 100 nA standby current extend battery life to multiple years.
Specifications
| Factory Lead Time | 12Weeks |
| YTEOL | 9 |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.30 |
| Country of Origin | Mainland China, Philippines, Taiwan |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the CPU frequency and core architecture of the STM32L451CEU6TR and how does the FPU benefit sensor fusion applications?
The STM32L451CEU6TR uses an ARM Cortex-M4 core running at up to 80 MHz with a hardware floating-point unit (FPU) and DSP instructions. In a 9-axis IMU sensor fusion algorithm, the FPU reduces quaternion rotation computation from approximately 300 clock cycles (software float) to under 80 clock cycles, enabling 1 kHz sensor fusion update rates while maintaining the MCU in a low-power run mode below 3 mA.
How much on-chip memory does the STM32L451CEU6TR provide and is it sufficient for a BLE application with a full protocol stack?
The STM32L451CEU6TR provides 512 kB of Flash memory and 160 kB of SRAM. A typical BLE 5.0 host stack requires approximately 150 kB of Flash and 30 kB of RAM, leaving over 350 kB of Flash and 130 kB of SRAM for application code, sensor drivers, and data buffers. This memory configuration comfortably supports concurrent BLE connectivity and RTOS-based sensor management firmware.
What is the minimum standby current of the STM32L451CEU6TR and how does that extend battery life in a coin-cell application?
In Stop 2 mode, the STM32L451CEU6TR achieves standby current as low as 100 nA while retaining RAM content and RTC operation. A CR2032 coin cell with 220 mAh capacity can sustain a sensor node that wakes every 10 seconds for 10 ms at 3 mA active current, averaging under 10 µA, resulting in a calculated battery life of over 2.5 years without recharge or replacement.
Which industrial communication interfaces does the STM32L451CEU6TR support for connecting to sensors and PLCs?
The STM32L451CEU6TR integrates multiple UART, SPI, and I2C interfaces along with USB full-speed (12 Mbps) and CAN bus support. In an industrial PLC I/O expander design, the MCU can simultaneously manage 2-wire UART MODBUS at 115.2 kbps, SPI at 8 MHz for a high-speed ADC, and CAN at 1 Mbps for fieldbus communication, all from a single 3.3 V supply in the 48-pin QFN package.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $6.2900 | $6.29 |
| 250+ | $5.8600 | $1465.00 |
| 500+ | $4.1700 | $2085.00 |
| 1000+ | $3.7600 | $3760.00 |
| 2500+ | $3.1400 | $7850.00 |
| 40000+ | $3.1371 | $125482.40 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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