STM32U073RCT6 - Ultra-Low-Power Arm Cortex-M0+ MCU | STMicroelectronics
MPN: STM32U073RCT6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for STM32U073RCT6 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:
STM32U073RBT6
β Drop-Inπ Reference alternative (not in catalog)
STM32U073RCT7
β Drop-Inπ Reference alternative (not in catalog)
STM32U073RCT6TR
β Drop-Inπ Reference alternative (not in catalog)
GD32F303RCT6
β Drop-Inπ Reference alternative (not in catalog)
APM32F103RCT6
β Drop-Inπ Reference alternative (not in catalog)
STM32U073RCT6 Maximum Ratings & Electrical Characteristics
| Core | Arm Cortex-M0+ |
| Maximum Frequency | 56 MHz |
| Flash Memory | 256 KB |
| SRAM | 40 KB |
| Package | 64-LQFP (10x10 mm) |
| Operating Voltage | 1.65 V to 3.6 V |
| Standby Current | 1.6 Β΅A (typical) |
| ADC | 12-bit, up to 16 channels |
| Communication Interfaces | I2C, SPI, USART, LPUART |
| USB | USB 2.0 full-speed device |
| Temperature Range | -40 Β°C to 85/125 Β°C |
| VBAT Mode Current | 130 nA (with RTC and 9 x 32-bit backup registers) |
| Process Technology | 90 nm |
| Cryptographic Accelerator | AES-128/256 |
| Mounting Type | Surface Mount |
STM32U073RCT6 Pin Configuration
| Pin 1 | VBAT β Backup power supply for RTC and backup registers |
| Pin 2 | PC13 β GPIO or RTC output |
| Pin 3 | PC14 β GPIO or OSC32_IN |
| Pin 4 | PC15 β GPIO or OSC32_OUT |
| Pin 5 | PF0 β GPIO |
| Pin 6 | PF1 β GPIO |
| Pin 7 | NRST β Reset (active low) |
| Pin 8 | VDD β Digital power supply |
| Pin 9 | VSS β Ground |
| Pin 10 | PA0 β GPIO or ADC input |
| Pin 11 | PA1 β GPIO or ADC input |
| Pin 12 | PA2 β GPIO or USART2_TX |
| Pin 13 | PA3 β GPIO or USART2_RX |
| Pin 14 | PA4 β GPIO or SPI1_NSS |
| Pin 15 | PA5 β GPIO or SPI1_SCK |
| Pin 16 | PA6 β GPIO or SPI1_MISO |
| Pin 17 | PA7 β GPIO or SPI1_MOSI |
| Pin 18 | PB0 β GPIO or ADC input |
| Pin 19 | PB1 β GPIO or ADC input |
| Pin 20 | PB2 β GPIO |
| Pin 21 | PB10 β GPIO or I2C2_SCL |
| Pin 22 | PB11 β GPIO or I2C2_SDA |
| Pin 23 | PB12 β GPIO or SPI2_NSS |
| Pin 24 | PB13 β GPIO or SPI2_SCK |
| Pin 25 | PB14 β GPIO or SPI2_MISO |
| Pin 26 | PB15 β GPIO or SPI2_MOSI |
| Pin 27 | PC6 β GPIO or USART6_TX |
| Pin 28 | PC7 β GPIO or USART6_RX |
| Pin 29 | PC8 β GPIO |
| Pin 30 | PC9 β GPIO |
| Pin 31 | PA8 β GPIO or USB_DP |
| Pin 32 | PA9 β GPIO or USB_DM |
| Pin 33 | PA10 β GPIO or USART1_RX |
| Pin 34 | PA11 β GPIO or USART1_CTS |
| Pin 35 | PA12 β GPIO or USART1_RTS |
| Pin 36 | PA13 β GPIO or SWDIO |
| Pin 37 | PA14 β GPIO or SWCLK |
| Pin 38 | PA15 β GPIO or JTDI |
| Pin 39 | PB3 β GPIO or JTDO |
| Pin 40 | PB4 β GPIO or NJTRST |
| Pin 41 | PB5 β GPIO or I2C1_SMBA |
| Pin 42 | PB6 β GPIO or I2C1_SCL |
| Pin 43 | PB7 β GPIO or I2C1_SDA |
| Pin 44 | BOOT0 β Boot mode selection |
| Pin 45 | PB8 β GPIO or I2C1_SCL |
| Pin 46 | PB9 β GPIO or I2C1_SDA |
| Pin 47 | VDD β Digital power supply |
| Pin 48 | VSS β Ground |
| Pin 49 | PC0 β GPIO or ADC input |
| Pin 50 | PC1 β GPIO or ADC input |
| Pin 51 | PC2 β GPIO or ADC input |
| Pin 52 | PC3 β GPIO or ADC input |
| Pin 53 | PC4 β GPIO or ADC input |
| Pin 54 | PC5 β GPIO or ADC input |
| Pin 55 | PD2 β GPIO |
| Pin 56 | VDD β Digital power supply |
| Pin 57 | VSS β Ground |
| Pin 58 | PH0 β GPIO or OSC_IN |
| Pin 59 | PH1 β GPIO or OSC_OUT |
| Pin 60 | VDD β Digital power supply |
| Pin 61 | VSS β Ground |
| Pin 62 | PC10 β GPIO or USART4_TX |
| Pin 63 | PC11 β GPIO or USART4_RX |
| Pin 64 | PC12 β GPIO or USART5_TX |
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
STM32U073RCT6 is suitable for 6 applications: Smart Meters, Portable Medical Devices, IoT Sensors, Wearable Electronics, Industrial Automation, Consumer Electronics.
Smart Meters
The STM32U073RCT6 is ideal for smart meters due to its ultra-low power consumption, rich peripheral set, and support for multiple communication interfaces. It can handle data acquisition, processing, and communication while maintaining low power consumption. The 12-bit ADC and multiple timers enable accurate measurement of energy consumption, while the USART and LPUART interfaces allow connectivity to communication modules. The device's low standby current ensures long battery life in battery-powered meters, and its wide operating voltage range accommodates various power supply configurations.
Recommended
Portable Medical Devices
The STM32U073RCT6 is well-suited for portable medical devices such as glucose monitors, pulse oximeters, and wearable health trackers. Its ultra-low power consumption extends battery life, critical for continuous monitoring. The device's 12-bit ADC can interface with various sensors, and its I2C and SPI interfaces support communication with external sensor modules. The USB 2.0 full-speed interface enables data transfer to a host device for analysis. The small LQFP64 package allows compact device designs, and the wide temperature range ensures reliable operation in clinical environments.
Recommended
IoT Sensors
The STM32U073RCT6 is an excellent choice for IoT sensors that require long battery life and reliable wireless connectivity. Its ultra-low standby current of 1.6 Β΅A allows sensors to remain in sleep mode for extended periods, waking only to take measurements and transmit data. The device supports multiple communication interfaces, including LPUART and SPI, which can interface with LoRa, Sigfox, or BLE modules. The hardware AES accelerator provides secure communication, essential for IoT applications. The wide operating voltage range allows direct battery operation, simplifying power supply design.
Recommended
Wearable Electronics
The STM32U073RCT6 is ideal for wearable electronics such as fitness trackers, smartwatches, and smart clothing. Its ultra-low power consumption and small package size make it perfect for space-constrained designs. The device's low-power modes, including standby current of 1.6 Β΅A, enable extended battery life, which is critical for wearables. The integrated USB 2.0 full-speed interface allows for easy charging and data synchronization. The 12-bit ADC can interface with various sensors, such as accelerometers and heart-rate monitors, while the I2C and SPI interfaces support communication with peripheral sensors.
Recommended
Industrial Automation
The STM32U073RCT6 is suitable for industrial automation applications such as sensor nodes, motor control, and process monitoring. Its wide operating temperature range (-40Β°C to 125Β°C) ensures reliable operation in harsh industrial environments. The device's multiple timers and PWM outputs enable precise motor control, while the 12-bit ADC can interface with various industrial sensors. The USART and SPI interfaces support communication with industrial networks such as Modbus. The device's low power consumption is beneficial for remote sensor nodes powered by batteries or energy harvesting.
Recommended
Consumer Electronics
The STM32U073RCT6 is used in consumer electronics such as smart home devices, remote controls, and portable gadgets. Its ultra-low power consumption and rich peripheral set make it versatile for various applications. The device supports USB 2.0 full-speed, enabling easy connectivity to PCs and chargers. The multiple communication interfaces allow integration with Wi-Fi, Bluetooth, and Zigbee modules for smart home connectivity. The small LQFP64 package is suitable for compact designs, and the wide operating voltage range accommodates battery or USB power.
Recommended
Recommended Products Summary
Engineering reference data for STM32U073RCT6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32U073RBT6 | STM32U073RCT7 | GD32F303RCT6 | APM32F103RCT6 |
|---|---|---|---|---|---|
| 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 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice | GigaDevice |
| Core | Arm Cortex-M0+ | Arm Cortex-M0+ | Arm Cortex-M0+ | Arm Cortex-M4 | Arm Cortex-M3 |
| Maximum Frequency | 56 MHz | 56 MHz | 56 MHz | 120 MHz | 72 MHz |
| Flash Memory | 256 KB | 128 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 40 KB | 40 KB | 40 KB | 48 KB | 48 KB |
| Operating Voltage | 1.65V to 3.6V | 1.65V to 3.6V | 1.65V to 3.6V | 2.6V to 3.6V | 2.0V to 3.6V |
| Standby Current | 1.6 Β΅A | 1.6 Β΅A | 1.6 Β΅A | 2.5 Β΅A | 2.0 Β΅A |
| USB | USB 2.0 full-speed device | USB 2.0 full-speed device | USB 2.0 full-speed device | USB 2.0 full-speed device | USB 2.0 full-speed device |
Key Differentiators
- Ultra-low standby current of 1.6 Β΅A (vs GD32F303RCT6)
- Wide operating voltage range from 1.65V (vs APM32F103RCT6)
- Hardware AES-128/256 cryptographic accelerator (vs STM32U073RBT6)
Design Notes
The STM32U073RCT6 operates from 1.65V to 3.6V. Use a 1Β΅F and 100nF capacitor close to each VDD pin to ensure stable power supply. For battery-powered applications, consider using a low-dropout regulator (LDO) to maintain voltage within the specified range. The VBAT pin can be connected to a backup battery for RTC and backup registers, with a typical current of 130 nA in VBAT mode.
Place the crystal oscillator and its load capacitors as close as possible to the OSC_IN and OSC_OUT pins (PH0 and PH1) to minimize parasitic capacitance and ensure stable clock generation. Use a ground plane under the crystal and keep the traces short and shielded. For the USB interface, route the DP and DM lines as a differential pair with controlled impedance (90 ohms) and place a 22-ohm series resistor on each line to reduce signal reflections.
Avoid floating GPIO pins, as they can increase power consumption and cause unpredictable behavior. Configure unused pins as analog inputs or outputs low. Ensure the BOOT0 pin is properly pulled low for normal boot from flash. When using the ADC, ensure the reference voltage is stable and decoupled with a capacitor. For low-power modes, disable unused peripherals and clocks to achieve the specified standby current of 1.6 Β΅A.
Compliance Information
Compliance information is based on STMicroelectronics standard product compliance. The STM32U073RCT6 is RoHS compliant and lead-free. AEC-Q100 qualification is not applicable for this standard product line.
