STM32L552ZET6 - Ultra-Low-Power ARM Cortex-M33 MCU | STMicroelectronics
MPN: STM32L552ZET6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for STM32L552ZET6 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:
STM32L552ZET6Q
β Drop-Inπ Reference alternative (not in catalog)
STM32L552ZET6
β Drop-Inβ 99,999 In Stock
$8.1 / Unit
View Datasheet βSTM32L552ZET6Q
β Drop-Inπ Reference alternative (not in catalog)
STM32L552ZET6
β Drop-Inβ 99,999 In Stock
$8.1 / Unit
View Datasheet βSTM32L552ZET6Q
β Drop-Inπ Reference alternative (not in catalog)
STM32L552ZET6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M33 with TrustZone |
| Maximum Clock Frequency | 110 MHz |
| Flash Memory | 512 KB |
| SRAM | 256 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Operating Temperature Range | -40Β°C to +85Β°C |
| Package | LQFP-144 (20x20 mm) |
| Mounting Type | Surface Mount |
| Number of I/O Pins | 115 |
| ADC Resolution | 12-bit |
| Number of ADC Channels | 16 |
| DAC Resolution | 12-bit |
| Number of Timers | 8 |
| Communication Interfaces | UART, SPI, I2C, USB, CAN, SAI |
| Low Power Consumption | 33 Β΅A/MHz in Run mode, 0.29 Β΅A in Standby |
| RoHS Status | Compliant |
STM32L552ZET6 Pin Configuration
| Pin 1 | VDD β Digital power supply |
| Pin 2 | VSS β Digital ground |
| Pin 3 | PA0 β General purpose I/O or ADC input |
| Pin 4 | PA1 β General purpose I/O or ADC input |
| Pin 5 | PA2 β General purpose I/O or USART2_TX |
| Pin 6 | PA3 β General purpose I/O or USART2_RX |
| Pin 7 | PA4 β General purpose I/O or DAC output |
| Pin 8 | PA5 β General purpose I/O or SPI1_SCK |
| Pin 9 | PA6 β General purpose I/O or SPI1_MISO |
| Pin 10 | PA7 β General purpose I/O or SPI1_MOSI |
| Pin 11 | PB0 β General purpose I/O or ADC input |
| Pin 12 | PB1 β General purpose I/O or ADC input |
| Pin 13 | PB2 β General purpose I/O or BOOT1 |
| Pin 14 | PB3 β General purpose I/O or SPI1_SCK |
| Pin 15 | PB4 β General purpose I/O or SPI1_MISO |
| Pin 16 | PB5 β General purpose I/O or SPI1_MOSI |
| Pin 17 | PB6 β General purpose I/O or I2C1_SCL |
| Pin 18 | PB7 β General purpose I/O or I2C1_SDA |
| Pin 19 | PB8 β General purpose I/O or I2C1_SCL |
| Pin 20 | PB9 β General purpose I/O or I2C1_SDA |
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
STM32L552ZET6 is suitable for 6 applications: IoT Edge Devices, Industrial Sensors, Wearable Health Monitors, Smart Home Controllers, Medical Devices, Battery-Powered Consumer Electronics.
IoT Edge Devices
The STM32L552ZET6 is ideal for IoT edge devices due to its ultra-low power consumption and TrustZone security. It can handle secure communication protocols like MQTT and TLS, while its low power modes extend battery life. The 110 MHz Cortex-M33 core provides sufficient processing power for sensor data aggregation and edge inference. In a typical IoT node, the MCU interfaces with sensors via I2C or SPI, processes data locally, and transmits it securely over Wi-Fi or LoRa. The device's multiple low-power modes allow it to sleep between transmissions, consuming only 0.29 Β΅A in standby, which is critical for battery-powered deployments. Designers should ensure proper antenna layout for wireless modules and use the MCU's cryptographic accelerators for efficient TLS handshakes.
Recommended
Industrial Sensors
In industrial environments, the STM32L552ZET6 provides reliable operation over a wide temperature range and robust communication interfaces. Its 12-bit ADC with 16 channels can interface with various analog sensors, while multiple UARTs and CAN support industrial protocols like Modbus and CANopen. The MCU's high performance enables real-time data processing and control. For example, in a pressure sensor application, the MCU reads the analog output, applies calibration algorithms, and transmits data over RS-485. The device's low power consumption is beneficial for loop-powered sensors. Designers should consider using the internal watchdog timer for system reliability and implement proper ESD protection on external interfaces.
Recommended
Wearable Health Monitors
The STM32L552ZET6 is well-suited for wearable health monitors due to its small footprint (LQFP-144) and ultra-low power consumption. It can process biometric signals from sensors like heart rate monitors and accelerometers, and run algorithms for activity tracking. The TrustZone security ensures patient data privacy. In a typical wearable, the MCU collects data from a PPG sensor via I2C, processes it using the DSP instructions, and stores it in flash. The device's low power modes allow it to operate for weeks on a small battery. Designers should optimize the firmware to use sleep modes aggressively and minimize active time. The MCU's multiple timers can be used for precise sampling intervals.
Recommended
Smart Home Controllers
The STM32L552ZET6 serves as a central controller in smart home systems, managing various peripherals such as lighting, thermostats, and security cameras. Its rich set of communication interfaces (UART, SPI, I2C, USB) allows seamless integration with different modules. The TrustZone security protects against unauthorized access. In a smart home hub, the MCU runs a real-time operating system (RTOS) to handle multiple tasks, such as processing sensor data and controlling actuators. The device's low power consumption is beneficial for always-on devices. Designers should use the MCU's DMA controllers to offload data transfer and reduce CPU load. The USB interface can be used for firmware updates and debugging.
Recommended
Medical Devices
The STM32L552ZET6 is suitable for medical devices such as glucose meters and infusion pumps, where reliability and security are paramount. Its TrustZone technology ensures secure storage of patient data and firmware integrity. The MCU's low power consumption extends battery life in portable devices. In a glucose meter, the MCU reads the sensor via ADC, calculates glucose levels, and displays results on an LCD. The device's multiple timers can be used for precise timing of measurements. Designers should follow medical device standards like IEC 60601 for safety and use the MCU's built-in self-test features. The wide supply voltage range allows operation from a single coin cell battery.
Recommended
Battery-Powered Consumer Electronics
The STM32L552ZET6 is ideal for battery-powered consumer electronics like remote controls, smart watches, and portable gaming devices. Its ultra-low power consumption and multiple low-power modes enable long battery life. The MCU's high performance supports rich user interfaces and complex applications. In a smart watch, the MCU handles sensor data, display updates, and wireless communication. The device's TrustZone security protects user data. Designers should optimize power consumption by using the MCU's low-power modes and disabling unused peripherals. The LQFP-144 package provides enough I/O pins for various peripherals, while the 512 KB flash allows for feature-rich firmware.
Recommended
Recommended Products Summary
Engineering reference data for STM32L552ZET6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32L552ZET6Q | STM32L552ZET6 | STM32L552ZET6Q |
|---|---|---|---|---|
| Package | LQFP-144 | LQFP-144 | LQFP-144 | LQFP-144 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | ARM Cortex-M33 | ARM Cortex-M33 | ARM Cortex-M33 | ARM Cortex-M33 |
| Max Clock Frequency | 110 MHz | 110 MHz | 110 MHz | 110 MHz |
| Flash Memory | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 256 KB | 256 KB | 256 KB | 256 KB |
| Supply Voltage Range | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V |
| Operating Temperature Range | -40Β°C to +85Β°C | -40Β°C to +125Β°C | -40Β°C to +85Β°C | -40Β°C to +125Β°C |
Key Differentiators
- TrustZone security (vs STM32L552ZET6Q)
- Ultra-low power consumption (vs STM32L552ZET6Q)
- Cost (vs STM32L552ZET6Q)
Design Notes
The STM32L552ZET6 operates from 1.71 V to 3.6 V. Use a low-dropout regulator (LDO) to provide a stable supply. Place 100 nF decoupling capacitors close to each VDD pin and a 4.7 Β΅F bulk capacitor on the main supply. For battery-powered designs, utilize the low-power modes (Sleep, Stop, Standby) to minimize current consumption. In Standby mode, the device draws only 0.29 Β΅A, extending battery life significantly.
For the LQFP-144 package, ensure proper soldering with a stencil thickness of 0.125 mm. Provide a solid ground plane under the device to reduce noise and improve thermal performance. Route high-speed signals (SPI, USB) with controlled impedance and keep trace lengths short. Place the crystal oscillator close to the OSC pins and add load capacitors as specified in the datasheet.
Avoid exceeding the absolute maximum ratings, especially on supply voltage (3.6 V) and I/O pins. Ensure the BOOT0 pin is correctly configured to boot from flash. When using TrustZone, properly configure the security attribution units (SAU) to avoid unexpected faults. Also, note that the internal MSI oscillator has limited accuracy; for precise timing, use an external crystal.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L552ZET6Q with extended temperature.
