STM32L452REY6TR - Ultra-low-power ARM Cortex-M4 MCU | STMicroelectronics
MPN: STM32L452REY6TR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
Drop-in alternatives for STM32L452REY6TR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM32L452REY6
β Drop-Inπ Reference alternative (not in catalog)
STM32L452REI6
β Drop-Inπ Reference alternative (not in catalog)
STM32L452REY6TR
β Drop-Inβ 99,999 In Stock
$4.16 / Unit
View Datasheet βSTM32L452REY6TR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU |
| Maximum Frequency | 80 MHz |
| Flash Memory | 512 KB |
| SRAM | 160 KB |
| Operating Voltage | 1.71 V to 3.6 V |
| GPIO Pins | 51 |
| Package | UFBGA-64 (Y6) |
| Operating Temperature | -40C to +85C |
| DMA Channels | 12 |
| ADC Resolution | 12-bit |
| DAC Resolution | 12-bit |
| Communication Interfaces | USART, SPI, I2C, USB 2.0 FS, CAN |
| Low-Power Mode Current | 28 Β΅A (Stop 2) |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
STM32L452REY6TR Pin Configuration
| Pin 1 | VDD β Digital power supply |
| Pin 2 | VSS β Digital ground |
| Pin 3 | PA0 β GPIO/ADC input |
| Pin 4 | PA1 β GPIO/ADC input |
| Pin 5 | PA2 β GPIO/USART2_TX |
| Pin 6 | PA3 β GPIO/USART2_RX |
| Pin 7 | PA4 β GPIO/SPI1_NSS |
| Pin 8 | PA5 β GPIO/SPI1_SCK |
| Pin 9 | PA6 β GPIO/SPI1_MISO |
| Pin 10 | PA7 β GPIO/SPI1_MOSI |
| Pin 11 | PB0 β GPIO/ADC input |
| Pin 12 | PB1 β GPIO/ADC input |
| Pin 13 | PB2 β GPIO |
| Pin 14 | PB3 β GPIO/SWO |
| Pin 15 | PB4 β GPIO |
| Pin 16 | PB5 β GPIO |
| Pin 17 | PB6 β GPIO/I2C1_SCL |
| Pin 18 | PB7 β GPIO/I2C1_SDA |
| Pin 19 | PB8 β GPIO/I2C1_SCL |
| Pin 20 | PB9 β GPIO/I2C1_SDA |
| Pin 21 | PB10 β GPIO/I2C2_SCL |
| Pin 22 | PB11 β GPIO/I2C2_SDA |
| Pin 23 | PB12 β GPIO/SPI2_NSS |
| Pin 24 | PB13 β GPIO/SPI2_SCK |
| Pin 25 | PB14 β GPIO/SPI2_MISO |
| Pin 26 | PB15 β GPIO/SPI2_MOSI |
| Pin 27 | PC0 β GPIO/ADC input |
| Pin 28 | PC1 β GPIO/ADC input |
| Pin 29 | PC2 β GPIO/ADC input |
| Pin 30 | PC3 β GPIO/ADC input |
| Pin 31 | PC4 β GPIO/ADC input |
| Pin 32 | PC5 β GPIO/ADC input |
| Pin 33 | PC6 β GPIO |
| Pin 34 | PC7 β GPIO |
| Pin 35 | PC8 β GPIO |
| Pin 36 | PC9 β GPIO |
| Pin 37 | PC10 β GPIO |
| Pin 38 | PC11 β GPIO |
| Pin 39 | PC12 β GPIO |
| Pin 40 | PC13 β GPIO/RTC |
| Pin 41 | PC14 β GPIO/OSC32_IN |
| Pin 42 | PC15 β GPIO/OSC32_OUT |
| Pin 43 | PH0 β OSC_IN |
| Pin 44 | PH1 β OSC_OUT |
| Pin 45 | NRST β Reset |
| Pin 46 | VDD β Digital power supply |
| Pin 47 | VSS β Digital ground |
| Pin 48 | VDDA β Analog power supply |
| Pin 49 | VSSA β Analog ground |
| Pin 50 | VREF+ β ADC reference voltage |
| Pin 51 | VREF- β ADC reference ground |
| Pin 52 | PA8 β GPIO/USART1_CK |
| Pin 53 | PA9 β GPIO/USART1_TX |
| Pin 54 | PA10 β GPIO/USART1_RX |
| Pin 55 | PA11 β GPIO/USB_DM |
| Pin 56 | PA12 β GPIO/USB_DP |
| Pin 57 | PA13 β SWDIO |
| Pin 58 | PA14 β SWCLK |
| Pin 59 | PA15 β GPIO/JTDI |
| Pin 60 | PB3 β GPIO/JTDO |
| Pin 61 | PB4 β GPIO/NJTRST |
| Pin 62 | PB5 β GPIO |
| Pin 63 | VDD β Digital power supply |
| Pin 64 | VSS β Digital ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STM32L452REY6TR is suitable for 6 applications: Industrial Sensors, Smart Meters, Wearable Devices, Medical Monitoring, IoT Edge Nodes, Portable Test Equipment.
Industrial Sensors
The STM32L452REY6TR is ideal for industrial sensors due to its ultra-low-power modes, wide operating voltage, and multiple communication interfaces. It can process sensor data locally, reducing the need for continuous wireless transmission. In a typical industrial sensor node, the MCU reads analog signals via the 12-bit ADC, applies digital filtering, and transmits results over RS-485 or CAN. The low-power Stop 2 mode (28 Β΅A) allows battery-powered operation for years. The 80 MHz Cortex-M4 core with FPU handles complex algorithms like vibration analysis or predictive maintenance. The wide temperature range (-40Β°C to +85Β°C) ensures reliable operation in harsh environments. Compared to higher-power MCUs, the STM32L452REY6TR extends battery life by 3-5x while maintaining sufficient processing capability.
Recommended
Smart Meters
Smart meters require precise measurement, low power, and secure communication. The STM32L452REY6TR provides a 12-bit ADC for accurate energy monitoring, a TRNG for security, and multiple UARTs for communication with PLC or RF modules. Its low-power modes enable battery backup operation during power outages. The 512 KB Flash allows storing tariff tables and usage history. The Cortex-M4 FPU accelerates calculation of RMS voltage and current. In a typical smart meter, the MCU samples voltage and current at 1 kHz, computes power, and communicates via a UART to a PLC modem. The Stop 2 mode (28 Β΅A) preserves data during standby. The wide voltage range (1.71V-3.6V) supports operation from a backup battery. Compared to 8-bit MCUs, the STM32L452REY6TR offers 10x more processing power and advanced security features.
Recommended
Wearable Devices
Wearable devices demand ultra-low power and small form factor. The STM32L452REY6TR's UFBGA-64 package (4x4 mm) fits compact PCBs, while its low-power modes extend battery life. The 80 MHz core handles sensor fusion algorithms for activity tracking. The integrated USB 2.0 FS enables charging and data transfer. In a typical fitness tracker, the MCU reads an accelerometer via I2C, processes steps, and displays data on an OLED. The Stop 2 mode (28 Β΅A) allows the device to remain in standby for days. The 160 KB SRAM buffers sensor data during active periods. The wide voltage range supports a Li-Po battery (3.7V) with a buck-boost converter. Compared to Cortex-M0+ MCUs, the Cortex-M4 with FPU provides 2x faster math processing for real-time algorithms.
Recommended
Medical Monitoring
Medical devices require high reliability and low power. The STM32L452REY6TR meets these needs with its wide temperature range, low-power modes, and rich analog peripherals. It can interface with biosensors via ADC and I2C, process signals with the FPU, and communicate via BLE or USB. In a typical heart rate monitor, the MCU samples an ECG signal at 500 Hz, filters noise, and transmits data via BLE. The 12-bit ADC provides sufficient resolution for medical signals. The Stop 2 mode (28 Β΅A) enables long standby between measurements. The 512 KB Flash stores patient data and firmware updates. The Cortex-M4 FPU accelerates digital filtering algorithms. Compared to general-purpose MCUs, the STM32L452REY6TR offers lower power consumption and better analog performance, making it suitable for portable medical devices.
Recommended
IoT Edge Nodes
IoT edge nodes require connectivity, processing, and low power. The STM32L452REY6TR provides multiple communication interfaces (USART, SPI, I2C, USB, CAN) and an 80 MHz core for edge computing. It can run lightweight ML models for anomaly detection. In a typical IoT node, the MCU collects sensor data, processes it locally, and sends only relevant information to the cloud via Wi-Fi or LoRa. The low-power modes allow battery-powered operation for months. The 512 KB Flash stores firmware and ML models. The TRNG enhances security for encrypted communication. The wide voltage range supports various power sources. Compared to higher-power MCUs, the STM32L452REY6TR reduces energy consumption by 50% while maintaining sufficient performance for edge AI.
Recommended
Portable Test Equipment
Portable test equipment requires high accuracy and low power. The STM32L452REY6TR's 12-bit ADC and DAC enable precise measurements and signal generation. The 80 MHz core handles complex algorithms for signal processing. In a typical handheld multimeter, the MCU samples voltage and current, calculates RMS, and displays results on an LCD. The low-power modes extend battery life. The 512 KB Flash stores calibration data and firmware. The USB interface allows data logging to a PC. The wide temperature range ensures accuracy in various environments. Compared to 16-bit MCUs, the Cortex-M4 with FPU provides faster floating-point math for accurate calculations. The STM32L452REY6TR is a cost-effective solution for professional test equipment.
Recommended
Recommended Products Summary
Engineering reference data for STM32L452REY6TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32L452REY6 | STM32L452RET6 | STM32L452RCT6 | STM32L452REI6 |
|---|---|---|---|---|---|
| Package | UFBGA-64 (Y6) | UFBGA-64 (Y6) - same | LQFP-64 (T6) - different | LQFP-64 (T6) - different | UFBGA-64 (I6) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU |
| Maximum Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 512 KB | 512 KB | 512 KB | 256 KB | 512 KB |
| SRAM | 160 KB | 160 KB | 160 KB | 64 KB | 160 KB |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| Price (1000 pcs) | $4.16 | $4.16 | $4.20 | $3.50 | $4.50 |
Key Differentiators
- Ultra-low-power Stop 2 mode with 28 Β΅A current (vs STM32L452RET6)
- UFBGA-64 package for compact designs (vs STM32L452RET6)
- 512 KB Flash and 160 KB SRAM (vs STM32L452RCT6)
Design Notes
Decouple each VDD pin with a 100 nF ceramic capacitor placed as close as possible to the pin. Additionally, place a 4.7 Β΅F capacitor on the main VDD rail. For VDDA, use a 1 Β΅F capacitor and a ferrite bead to isolate analog noise. Ensure VREF+ is connected to VDDA through a low-pass filter for accurate ADC readings.
For the UFBGA-64 package, use a 4-layer PCB with a solid ground plane. Route high-speed signals (USB, SPI) with controlled impedance (90 ohms for USB). Keep crystal oscillator traces short and shielded. Follow ST's layout guidelines in AN4666 for optimal EMC performance.
Do not leave unused GPIO pins floating; configure them as analog inputs or outputs to reduce leakage. Ensure the NRST pin has a 100 nF capacitor to ground for reliable reset. When using low-power modes, disable unused peripherals and clocks to achieve the specified 28 Β΅A Stop 2 current.
Compliance Information
RoHS and REACH compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L452REI6 (industrial grade) or other automotive-grade variants.
