STM32U535RET6 - Ultra-Low-Power Cortex-M33 MCU | STMicroelectronics
MPN: STM32U535RET6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.22 | $5.22 |
| 10 | $4.8 | $48.00 |
| 100 | $4.2 | $420.00 |
| 500 | $3.8 | $1,900.00 |
| 1,000 | $3.5 | $3,500.00 |
Drop-in alternatives for STM32U535RET6 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:
STM32U535RCT6
β Drop-Inπ Reference alternative (not in catalog)
STM32U535RET7
β Drop-Inπ Reference alternative (not in catalog)
STM32U535RCT7
β Drop-Inπ Reference alternative (not in catalog)
STM32U575RET6
β Drop-Inπ Reference alternative (not in catalog)
GD32F427RET6
β Drop-Inπ Reference alternative (not in catalog)
STM32U535RET6 Maximum Ratings & Electrical Characteristics
| Core | Arm Cortex-M33 with TrustZone and FPU |
| Maximum Clock Frequency | 160 MHz |
| Flash Memory | 512 KB |
| SRAM | 274 KB |
| Data Bus Width | 32-bit |
| Package | 64-LQFP (10x10 mm) |
| Operating Temperature Range | -40Β°C to +85Β°C |
| Supply Voltage Range | 1.8V to 3.6V |
| Number of I/O Pins | 52 |
| DMA Channels | 16 |
| ADC Resolution | 12-bit |
| DAC Resolution | 12-bit |
| Communication Interfaces | USART, SPI, I2C, USB |
| Security | TrustZone, AES, RNG |
| RoHS Status | Compliant |
STM32U535RET6 Pin Configuration
| Pin 1 | VBAT β Battery backup supply |
| Pin 2 | PC14 β GPIO / OSC32_IN |
| Pin 3 | PC15 β GPIO / OSC32_OUT |
| Pin 4 | PF0 β GPIO / OSC_IN |
| Pin 5 | PF1 β GPIO / OSC_OUT |
| Pin 6 | NRST β Reset |
| Pin 7 | PC0 β GPIO / ADC |
| Pin 8 | PC1 β GPIO / ADC |
| Pin 9 | PC2 β GPIO / ADC |
| Pin 10 | PC3 β GPIO / ADC |
| Pin 11 | VDD β Power supply |
| Pin 12 | VSS β Ground |
| Pin 13 | PC4 β GPIO / ADC |
| Pin 14 | PC5 β GPIO / ADC |
| Pin 15 | PB0 β GPIO / ADC |
| Pin 16 | PB1 β GPIO / ADC |
| Pin 17 | PB2 β GPIO / BOOT1 |
| Pin 18 | PB10 β GPIO / I2C2_SCL |
| Pin 19 | PB11 β GPIO / I2C2_SDA |
| Pin 20 | VDD β Power supply |
| Pin 21 | VSS β Ground |
| Pin 22 | PB12 β GPIO / SPI2_NSS |
| Pin 23 | PB13 β GPIO / SPI2_SCK |
| Pin 24 | PB14 β GPIO / SPI2_MISO |
| Pin 25 | PB15 β GPIO / SPI2_MOSI |
| Pin 26 | PC6 β GPIO / TIM3_CH1 |
| Pin 27 | PC7 β GPIO / TIM3_CH2 |
| Pin 28 | PC8 β GPIO / TIM3_CH3 |
| Pin 29 | PC9 β GPIO / TIM3_CH4 |
| Pin 30 | PA0 β GPIO / ADC / WKUP |
| Pin 31 | PA1 β GPIO / ADC |
| Pin 32 | PA2 β GPIO / USART2_TX |
| Pin 33 | PA3 β GPIO / USART2_RX |
| Pin 34 | VDD β Power supply |
| Pin 35 | VSS β Ground |
| Pin 36 | PA4 β GPIO / DAC |
| Pin 37 | PA5 β GPIO / DAC |
| Pin 38 | PA6 β GPIO / SPI1_MISO |
| Pin 39 | PA7 β GPIO / SPI1_MOSI |
| Pin 40 | PC10 β GPIO / USART3_TX |
| Pin 41 | PC11 β GPIO / USART3_RX |
| Pin 42 | PC12 β GPIO / USART3_CK |
| Pin 43 | PD2 β GPIO / TIM3_ETR |
| Pin 44 | PB3 β GPIO / SPI1_SCK |
| Pin 45 | PB4 β GPIO / SPI1_NSS |
| Pin 46 | PB5 β GPIO / I2C1_SMBA |
| Pin 47 | PB6 β GPIO / I2C1_SCL |
| Pin 48 | PB7 β GPIO / I2C1_SDA |
| Pin 49 | BOOT0 β Boot mode selection |
| Pin 50 | PB8 β GPIO / CAN_RX |
| Pin 51 | PB9 β GPIO / CAN_TX |
| Pin 52 | VDD β Power supply |
| Pin 53 | VSS β Ground |
| Pin 54 | PA8 β GPIO / MCO |
| Pin 55 | PA9 β GPIO / USART1_TX |
| Pin 56 | PA10 β GPIO / USART1_RX |
| Pin 57 | PA11 β GPIO / USB_DM |
| Pin 58 | PA12 β GPIO / USB_DP |
| Pin 59 | PA13 β GPIO / SWDIO |
| Pin 60 | PA14 β GPIO / SWCLK |
| Pin 61 | PA15 β GPIO / JTDI |
| Pin 62 | PC13 β GPIO / RTC |
| Pin 63 | PC14 β GPIO / OSC32_IN |
| Pin 64 | PC15 β GPIO / OSC32_OUT |
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
STM32U535RET6 is suitable for 6 applications: Smart Wearables, Industrial Sensors, Medical Devices, IoT Edge Nodes, Portable Medical Monitors, Smart Home Devices.
Smart Wearables
The STM32U535RET6 is ideal for smart wearables due to its ultra-low-power consumption and compact LQFP-64 package. Its 160 MHz Cortex-M33 core provides sufficient processing power for sensor fusion and health monitoring algorithms, while the TrustZone security protects user data. In a typical fitness tracker, the MCU manages an accelerometer, heart-rate sensor, and Bluetooth Low Energy connectivity, running for weeks on a small battery. The device's multiple low-power modes allow the system to sleep between sensor readings, extending battery life significantly. According to ST's application notes, the STM32U5 series can achieve sub-microamp standby currents, making it perfect for always-on wearable devices.
Recommended
Industrial Sensors
The STM32U535RET6 excels in industrial sensor applications, offering a wide supply voltage range and robust communication interfaces. Its 512 KB flash allows for complex calibration algorithms and data logging, while the 274 KB SRAM buffers sensor data for real-time processing. The MCU's 12-bit ADC and DAC enable direct interfacing with analog sensors and actuators. In a predictive maintenance system, the STM32U535RET6 can process vibration data from an accelerometer, perform FFT analysis, and transmit results over RS-485 or CAN. The device's industrial temperature range (-40Β°C to +85Β°C) ensures reliable operation in harsh environments. According to ST's datasheet, the MCU's low-power modes are particularly useful for battery-powered wireless sensor nodes.
Recommended
Medical Devices
The STM32U535RET6 is well-suited for medical devices, where security and reliability are paramount. The Arm TrustZone technology provides hardware-enforced isolation for patient data, meeting regulatory requirements. The MCU's ultra-low-power operation extends battery life in portable monitors, such as glucose meters and pulse oximeters. Its 160 MHz core handles real-time signal processing for ECG or EEG signals, while the 512 KB flash stores firmware and patient records. The device's multiple communication interfaces, including USB, enable easy data transfer to external systems. According to ST's product page, the STM32U5 series is designed for medical applications requiring high security and low power consumption.
Recommended
IoT Edge Nodes
The STM32U535RET6 is a perfect choice for IoT edge nodes, combining ultra-low-power operation with advanced security features. Its TrustZone technology ensures secure boot and firmware updates, protecting against cyber threats. The MCU's 160 MHz Cortex-M33 core can run machine learning models for edge inference, reducing the need for cloud connectivity. In a smart agriculture system, the STM32U535RET6 can collect data from soil moisture sensors, process it locally, and transmit results via LoRa or NB-IoT. The device's low-power modes allow it to run for years on a single battery. According to ST's application notes, the STM32U5 series is optimized for battery-powered IoT devices, with a standby current of less than 1 Β΅A.
Recommended
Portable Medical Monitors
The STM32U535RET6 is ideal for portable medical monitors, offering a balance of performance, security, and power efficiency. Its 160 MHz Cortex-M33 core can handle real-time signal processing for vital sign monitoring, while the TrustZone ensures secure handling of patient data. The MCU's 512 KB flash provides ample storage for firmware and data logs, and the 274 KB SRAM supports complex algorithms. In a wearable ECG monitor, the STM32U535RET6 can process ECG signals, detect arrhythmias, and alert the user via Bluetooth. The device's ultra-low-power modes extend battery life, making it suitable for continuous monitoring. According to ST's datasheet, the STM32U5 series is designed for medical applications requiring high reliability and low power consumption.
Recommended
Smart Home Devices
The STM32U535RET6 is well-suited for smart home devices, providing a secure and energy-efficient platform. Its TrustZone technology protects against unauthorized access, while the ultra-low-power modes enable battery-operated devices like smart locks and sensors. The MCU's 160 MHz core can handle voice recognition and local processing, reducing latency and cloud dependency. In a smart thermostat, the STM32U535RET6 can manage temperature sensors, control HVAC systems, and communicate via Wi-Fi or Zigbee. The device's rich peripheral set, including multiple timers and communication interfaces, simplifies system design. According to ST's product page, the STM32U5 series is designed for smart home applications requiring security and low power consumption.
Recommended
Recommended Products Summary
Engineering reference data for STM32U535RET6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32U535RCT6 | STM32U535RET7 | STM32U535RCT7 | STM32U575RET6 | GD32F427RET6 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Core | Cortex-M33 | Cortex-M33 | Cortex-M33 | Cortex-M33 | Cortex-M33 | Cortex-M4 |
| Max Clock Frequency | 160 MHz | 160 MHz | 160 MHz | 160 MHz | 160 MHz | 200 MHz |
| Flash Memory | 512 KB | 256 KB | 512 KB | 256 KB | 512 KB | 512 KB |
| SRAM | 274 KB | 274 KB | 274 KB | 274 KB | 786 KB | 192 KB |
| TrustZone | Yes | Yes | Yes | Yes | Yes | No |
| Operating Temperature Range | -40Β°C to +85Β°C | -40Β°C to +85Β°C | -40Β°C to +105Β°C | -40Β°C to +105Β°C | -40Β°C to +85Β°C | -40Β°C to +85Β°C |
Key Differentiators
- Ultra-low-power consumption with multiple low-power modes (vs GD32F427RET6)
- Arm TrustZone security (vs GD32F427RET6)
- Higher SRAM capacity (vs STM32U535RCT6)
Design Notes
The STM32U535RET6 operates from 1.8V to 3.6V. Use a low-dropout regulator (LDO) to provide a clean supply, and place 100 nF and 4.7 Β΅F decoupling capacitors close to each VDD pin. For battery-powered designs, enable the low-power modes (Stop, Standby) to reduce current consumption to microamps. According to ST's application note AN5347, proper power sequencing is critical to avoid latch-up.
For the 64-pin LQFP package, ensure adequate ground plane and thermal vias under the exposed pad (if present) to improve heat dissipation. Keep high-speed traces (USB, SPI) short and impedance-controlled. Follow ST's layout guidelines in AN4666 for optimal EMC performance.
A common mistake is forgetting to configure the boot pins (BOOT0) correctly, which can prevent the MCU from starting. Also, ensure the NRST pin has a proper pull-up resistor and capacitor for reliable reset. When using TrustZone, remember to set up the secure/non-secure boundaries correctly in the SAU and MPU, as incorrect configuration can cause hard faults.
Compliance Information
RoHS compliant per ST product page. Not AEC-Q100 qualified. Lead-free per ST's environmental policy.
