STMicroelectronics

STM32U073RCT6 - Ultra-Low-Power Arm Cortex-M0+ MCU | STMicroelectronics

Name: STM32U073RCT6
Brand: STMicroelectronics
Price: 3.50 USD
Availability: InStock

MPN: STM32U073RCT6 ✓ Active

In Stock (99,999) Ships in 1-3 business days

1.65V to 3.6V Vdss 1.6 µA Id LQFP64 Package 56 MHz Speed 256 KB Memory

$3.5 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$3.5	$3.50
10	$3.15	$31.50
100	$2.8	$280.00
500	$2.52	$1,260.00
1,000	$2.24	$2,240.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for STM32U073RCT6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

STM32U073RBT6

✅ Drop-In

📦 LQFP64

Same package and pinout, but 128 KB flash instead of 256 KB

📋 Reference alternative (not in catalog)

STM32U073RCT6TR

✅ Drop-In

📦 LQFP64

Same die and package, tape and reel packaging variant

📋 Reference alternative (not in catalog)

STM32L073RZT6

✅ Drop-In

STMicroelectronics

📦 LQFP64

ARM Cortex-M0+ · 32 MHz · 192 KB · 20 KB · 1.8 V to 3.6 V · LQFP-64 (10x10 mm) · 51 · 1x 12-bit, 16 channels, with hardware oversampling

✓ 99,999 In Stock

$4.11 / Unit

View Datasheet →

STM32L071RZT6

✅ Drop-In

📦 LQFP64

192 KB flash, 20 KB SRAM, lower performance, pin-compatible

📋 Reference alternative (not in catalog)

LPC824M201JHI33

⚡ Same Package

📦 LQFP64

Different core (Cortex-M0+), 32 KB flash, not pin-compatible, requires PCB redesign

📋 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	LQFP64
Operating Voltage	1.65V to 3.6V
Standby Current	1.6 µA
ADC Resolution	12-bit
ADC Channels	16
Communication Interfaces	I2C, SPI, USART, LPUART, USB 2.0 FS
Timers	Multiple 16-bit and 32-bit timers
Operating Temperature	-40°C to +85°C
Mounting Type	Surface Mount
RoHS Status	Compliant
AEC-Q100	Not qualified

STM32U073RCT6 Pin Configuration

Pin 1	VBAT — Battery backup supply
Pin 2	PC14 — GPIO / OSC32_IN
Pin 3	PC15 — GPIO / OSC32_OUT
Pin 4	VSS — Ground
Pin 5	VDD — Power supply
Pin 6	PH0 — GPIO / OSC_IN
Pin 7	PH1 — GPIO / OSC_OUT
Pin 8	NRST — Reset
Pin 9	PC0 — GPIO / ADC_IN10
Pin 10	PC1 — GPIO / ADC_IN11
Pin 11	PC2 — GPIO / ADC_IN12
Pin 12	PC3 — GPIO / ADC_IN13
Pin 13	VDD — Power supply
Pin 14	VSS — Ground
Pin 15	PA0 — GPIO / ADC_IN0 / WKUP1
Pin 16	PA1 — GPIO / ADC_IN1
Pin 17	PA2 — GPIO / ADC_IN2 / USART2_TX
Pin 18	PA3 — GPIO / ADC_IN3 / USART2_RX
Pin 19	PA4 — GPIO / ADC_IN4 / SPI1_NSS
Pin 20	PA5 — GPIO / ADC_IN5 / SPI1_SCK
Pin 21	PA6 — GPIO / ADC_IN6 / SPI1_MISO
Pin 22	PA7 — GPIO / ADC_IN7 / SPI1_MOSI
Pin 23	PC4 — GPIO / ADC_IN14
Pin 24	PC5 — GPIO / ADC_IN15
Pin 25	PB0 — GPIO / ADC_IN8
Pin 26	PB1 — GPIO / ADC_IN9
Pin 27	PB2 — GPIO / BOOT1
Pin 28	PB10 — GPIO / I2C2_SCL
Pin 29	PB11 — GPIO / I2C2_SDA
Pin 30	VSS — Ground
Pin 31	VDD — Power supply
Pin 32	PB12 — GPIO / SPI2_NSS
Pin 33	PB13 — GPIO / SPI2_SCK
Pin 34	PB14 — GPIO / SPI2_MISO
Pin 35	PB15 — GPIO / SPI2_MOSI
Pin 36	PC6 — GPIO / USART6_TX
Pin 37	PC7 — GPIO / USART6_RX
Pin 38	PC8 — GPIO / USART6_CK
Pin 39	PC9 — GPIO / USB_DM
Pin 40	PA8 — GPIO / USB_DP
Pin 41	PA9 — GPIO / USART1_TX
Pin 42	PA10 — GPIO / USART1_RX
Pin 43	PA11 — GPIO / USART1_CTS
Pin 44	PA12 — GPIO / USART1_RTS
Pin 45	PA13 — GPIO / SWDIO
Pin 46	VSS — Ground
Pin 47	VDD — Power supply
Pin 48	PA14 — GPIO / SWCLK
Pin 49	PA15 — GPIO / JTDI
Pin 50	PB3 — GPIO / JTDO
Pin 51	PB4 — GPIO / NJTRST
Pin 52	PB5 — GPIO / I2C1_SMBA
Pin 53	PB6 — GPIO / I2C1_SCL
Pin 54	PB7 — GPIO / I2C1_SDA
Pin 55	BOOT0 — Boot mode selection
Pin 56	PB8 — GPIO / I2C1_SCL
Pin 57	PB9 — GPIO / I2C1_SDA
Pin 58	VSS — Ground
Pin 59	VDD — Power supply
Pin 60	PC10 — GPIO / USART4_TX
Pin 61	PC11 — GPIO / USART4_RX
Pin 62	PC12 — GPIO / USART5_TX
Pin 63	PD2 — GPIO / USART5_RX
Pin 64	VDD — Power supply

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, Smart Home Devices.

🏭

Smart Meters

The STM32U073RCT6 is ideal for smart meters due to its ultra-low power consumption, which extends battery life, and its rich communication interfaces (LPUART, I2C, SPI) for data transmission. It can handle metering calculations, display control, and communication protocols while maintaining low energy usage. The 12-bit ADC allows accurate measurement of voltage and current, and the hardware cryptographic accelerator ensures secure data transmission.

Recommended

STM32U073RCT6 · STMicroelectronics SGM2200 (Low-dropout regulator for power supply)

💊

Portable Medical Devices

In portable medical devices such as glucose monitors and pulse oximeters, the STM32U073RCT6 provides the processing power and low power consumption needed for continuous monitoring. Its 12-bit ADC interfaces with sensors, and the ultra-low standby current (1.6 µA) ensures long battery life. The device's small LQFP64 package fits compact designs, and its USB support enables easy data transfer to a host for analysis.

Recommended

STM32U073RCT6 · STMicroelectronics MAX30102 (Pulse oximeter sensor)

🧩

IoT Sensors

The STM32U073RCT6 is perfect for IoT sensors that require long battery life and wireless connectivity. Its ultra-low power modes and 1.6 µA standby current allow sensors to operate for years on a single coin cell. The device supports various communication interfaces (LPUART, SPI, I2C) to connect to LoRa, BLE, or Wi-Fi modules. The hardware cryptographic accelerator enhances security for data transmission, making it suitable for smart home and industrial IoT applications.

Recommended

STM32U073RCT6 · STMicroelectronics SX1276 (LoRa transceiver for wireless communication)

📱

Wearable Electronics

Wearable devices such as fitness trackers and smartwatches benefit from the STM32U073RCT6's low power consumption and small footprint. The device can handle sensor fusion, display control, and communication while maintaining a long battery life. Its 1.65V minimum operating voltage allows direct battery connection, and the multiple low-power modes enable efficient power management. The integrated USB supports charging and data transfer.

Recommended

STM32U073RCT6 · STMicroelectronics LSM6DSO (Accelerometer and gyroscope for motion tracking)

🏭

Industrial Automation

In industrial automation, the STM32U073RCT6 provides reliable control and monitoring capabilities. Its multiple timers and communication interfaces (USART, SPI, I2C) enable interfacing with sensors, actuators, and industrial networks. The device operates over a wide temperature range (-40°C to +85°C) and is RoHS compliant, making it suitable for harsh environments. The 12-bit ADC allows precise analog signal acquisition for process control.

Recommended

STM32U073RCT6 · STMicroelectronics ISO7741 (Digital isolator for industrial communication)

🏠

Smart Home Devices

The STM32U073RCT6 is well-suited for smart home devices like smart thermostats, lighting controls, and security systems. Its low power consumption allows battery operation, and its communication interfaces enable connectivity with home automation hubs. The device's security features (AES encryption) protect data, and its small package fits into compact enclosures. The ultra-low standby current ensures minimal energy waste when idle.

Recommended

STM32U073RCT6 · STMicroelectronics ESP8266 (Wi-Fi module for connectivity)

Recommended Products Summary

STM32U073RCT6 STMicroelectronics Used in: Smart Meters, Portable Medical Devices, IoT Sensors, Wearable Electronics, Industrial Automation, Smart Home Devices SGM2200 Low-dropout regulator for power supply Used in: Smart Meters MAX30102 Pulse oximeter sensor Used in: Portable Medical Devices SX1276 LoRa transceiver for wireless communication Used in: IoT Sensors LSM6DSO Accelerometer and gyroscope for motion tracking Used in: Wearable Electronics ISO7741 Digital isolator for industrial communication Used in: Industrial Automation ESP8266 Wi-Fi module for connectivity Used in: Smart Home Devices

What is the maximum clock frequency of STM32U073RCT6?

The STM32U073RCT6 operates at a maximum clock frequency of 56 MHz. According to the STMicroelectronics datasheet, the Cortex-M0+ core can run at up to 56 MHz, providing a balance between performance and power consumption for ultra-low-power applications.

What is the standby current of STM32U073RCT6?

The STM32U073RCT6 has a typical standby current of 1.6 µA. This ultra-low standby current makes it ideal for battery-powered devices that require long battery life, such as IoT sensors and wearable devices.

What is the difference between STM32U073RCT6 and STM32U073RBT6?

The STM32U073RCT6 has 256 KB of flash memory, while the STM32U073RBT6 has 128 KB. Both are in the same LQFP64 package and are pin-compatible, but the RCT6 offers double the flash capacity, making it suitable for applications requiring larger code storage.

Can STM32U073RCT6 be used for IoT applications?

Yes, the STM32U073RCT6 is well-suited for IoT applications due to its ultra-low power consumption, rich communication interfaces (I2C, SPI, USART, LPUART, USB), and hardware cryptographic acceleration for AES-128/256. These features enable secure and efficient data transmission in IoT devices.

What is the operating voltage range of STM32U073RCT6?

The STM32U073RCT6 operates from 1.65V to 3.6V. This wide voltage range allows the device to be powered directly from batteries or energy harvesting sources, simplifying power supply design.

Does STM32U073RCT6 have a built-in ADC?

Yes, the STM32U073RCT6 includes a 12-bit ADC with up to 16 channels. This allows direct connection of analog sensors without the need for an external ADC, reducing component count and system cost.

What is the package type of STM32U073RCT6?

The STM32U073RCT6 is available in a 64-pin LQFP package (LQFP64). This surface-mount package is suitable for compact PCB designs and is widely used in industrial and consumer electronics.

Is STM32U073RCT6 RoHS compliant?

Yes, the STM32U073RCT6 is RoHS compliant. According to the STMicroelectronics product page, the device meets the Restriction of Hazardous Substances directive, ensuring it is free from lead and other hazardous materials.

What is the price of STM32U073RCT6?

As of 2026-08-09, the price of STM32U073RCT6 is approximately $3.50 for a single unit, with volume discounts available. For example, at 1000 units, the price drops to $2.24 per unit. Prices may vary by distributor and quantity.

Where can I buy STM32U073RCT6?

The STM32U073RCT6 is available from major distributors such as DigiKey and Mouser. You can also purchase directly from STMicroelectronics' official website. Check current stock and pricing on these platforms.

What is the lead time for STM32U073RCT6?

The lead time for STM32U073RCT6 typically ranges from 2 to 4 weeks, depending on the distributor and order quantity. For large orders, it is advisable to contact the distributor for accurate lead time information.

What is the best drop-in replacement for STM32U073RCT6?

The best drop-in replacement for STM32U073RCT6 is the STM32U073RBT6, which is pin-compatible and shares the same LQFP64 package, but has 128 KB flash instead of 256 KB. For a cross-brand alternative, the NXP LPC824 is a functional equivalent but requires PCB modification due to different package.

Can STM32U073RCT6 be replaced by STM32L073RZT6?

The STM32L073RZT6 is a drop-in replacement for STM32U073RCT6 as it shares the same LQFP64 package and pinout, but it has a different core (Cortex-M0+ vs Cortex-M0+) and lower maximum frequency (32 MHz vs 56 MHz). It also has lower flash memory (192 KB vs 256 KB). Verify the pinout and electrical characteristics before replacement.

What is the difference between STM32U073RCT6 and STM32L073RZT6?

The STM32U073RCT6 is based on the Cortex-M0+ core and operates at up to 56 MHz, while the STM32L073RZT6 is also Cortex-M0+ but runs at a lower maximum frequency of 32 MHz. The U073RCT6 has 256 KB flash and 40 KB SRAM, whereas the L073RZT6 has 192 KB flash and 20 KB SRAM. Both are in LQFP64 packages and are pin-compatible.

When should I choose STM32U073RCT6 over STM32L073RZT6?

Choose STM32U073RCT6 when you need higher performance (56 MHz vs 32 MHz) and more memory (256 KB flash vs 192 KB). It is also more power-efficient with a standby current of 1.6 µA, making it better for battery-powered applications. Choose STM32L073RZT6 if you require a lower-cost option with sufficient resources for simpler applications.

Is STM32U073RCT6 suitable for battery-powered devices?

Yes, the STM32U073RCT6 is highly suitable for battery-powered devices due to its ultra-low power consumption, including a standby current of 1.6 µA and multiple low-power modes. It also operates from 1.65V, allowing direct battery connection.

What development tools are compatible with STM32U073RCT6?

The STM32U073RCT6 is supported by STMicroelectronics' STM32CubeIDE, which includes configuration tools, code generation, and debugging. It is also compatible with Keil MDK-ARM and IAR Embedded Workbench. The ST-Link debugger can be used for programming and debugging.

What is the maximum number of GPIO pins on STM32U073RCT6?

The STM32U073RCT6 has up to 51 GPIO pins, depending on the configuration. These pins are multiplexed with various peripheral functions, allowing flexible I/O usage.

Does STM32U073RCT6 support USB?

Yes, the STM32U073RCT6 supports USB 2.0 full-speed device mode. This enables direct connection to a host for data transfer, firmware updates, or charging, making it ideal for portable devices.

What is the thermal resistance of STM32U073RCT6?

The thermal resistance (θJA) of the LQFP64 package is approximately 45°C/W, as per the STMicroelectronics datasheet. This should be considered when designing for high ambient temperatures or high power dissipation.

Engineering reference data for STM32U073RCT6 — comparison, design guidance, and compliance information.

Selection Guide

Choose the STM32U073RCT6 when you need a high-performance, ultra-low-power MCU with 256 KB flash and 40 KB SRAM for complex applications like smart meters and IoT sensors. If you require less flash (128 KB) and can accept the same performance, the STM32U073RBT6 is a cost-effective drop-in alternative. For applications with lower performance needs (32 MHz) and lower power consumption (0.29 µA standby), the STM32L073RZT6 is a suitable choice, but it has less SRAM (20 KB). The STM32L071RZT6 offers similar features with 192 KB flash but lower SRAM. For a cross-brand alternative, the NXP LPC824M201JHI33 is not pin-compatible and requires PCB redesign, so it is only recommended for new designs where the STM32 ecosystem is not required.

Comparison with Alternatives

Parameter	This Product	STM32U073RBT6	STM32L073RZT6	STM32L071RZT6	LPC824M201JHI33
Package	LQFP64	LQFP64 - same	LQFP64 - same	LQFP64 - same	LQFP64 - same
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	NXP Semiconductors
Core	Arm Cortex-M0+	Arm Cortex-M0+	Arm Cortex-M0+	Arm Cortex-M0+	Arm Cortex-M0+
Maximum Frequency	56 MHz	56 MHz	32 MHz	32 MHz	30 MHz
Flash Memory	256 KB	128 KB	192 KB	192 KB	32 KB
SRAM	40 KB	40 KB	20 KB	20 KB	8 KB
Standby Current	1.6 µA	1.6 µA	0.29 µA	0.29 µA	2 µA
ADC Resolution	12-bit	12-bit	12-bit	12-bit	12-bit

Key Differentiators

Higher flash memory (256 KB) compared to STM32U073RBT6 (vs STM32U073RBT6)
Higher maximum frequency (56 MHz) compared to STM32L073RZT6 (vs STM32L073RZT6)
Lower standby current (1.6 µA) compared to LPC824M201JHI33 (vs LPC824M201JHI33)

Design Notes

Decouple each VDD pin with a 100nF capacitor and a 1µF capacitor placed as close to the pin as possible. Use a single 4.7µF capacitor on the VBAT pin if battery backup is used. Ensure the power supply is stable and within the 1.65V to 3.6V range to avoid brownouts.

For the crystal oscillator, place the crystal and its load capacitors (typically 10-20pF) as close as possible to the OSC_IN and OSC_OUT pins. Keep the trace lengths short and avoid routing high-speed signals near the oscillator to prevent noise coupling.

Unused GPIO pins should be configured as analog inputs or outputs to avoid floating inputs, which can increase power consumption. Also, ensure the BOOT0 pin is properly pulled low for normal boot mode. When using USB, add a 1.5kΩ pull-up resistor on the USB_DP pin as required by the USB specification.