STM32U073KCU6

Product Overview

The STM32U073KCU6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics based on the Arm Cortex-M0+ processor, operating at up to 56 MHz. It integrates 256KB of Flash memory, 40KB of SRAM with hardware parity checking, an LCD controller, USB connectivity and a wide range of analog and digital peripherals.

Part of the STM32U0 series, the STM32U073KCU6 is designed for energy-efficient embedded systems that require reliable processing, low power consumption and compact integration. Its integrated LCD driver, USB Full-Speed interface, analog peripherals and flexible communication interfaces make it suitable for smart meters, consumer electronics, portable instruments, industrial monitoring and battery-powered devices.

The exact STM32U073KCU6 uses a UFQFPN-32 package measuring 5 × 5 × 0.55 mm, operates from 1.71V to 3.6V and supports an operating temperature range of -40°C to +85°C. STMicroelectronics lists the device as active and in volume production.

Key Features

• 32-bit Arm Cortex-M0+ processor

• CPU frequency up to 56 MHz

• 256KB embedded Flash memory

• 40KB SRAM with hardware parity checking

• Memory Protection Unit (MPU)

• DMA controller

• 12-bit ADC with conversion time as low as 0.4 µs

• Hardware ADC oversampling for effective resolution up to 16-bit

• 12-bit DAC with low-power sample-and-hold capability

• Integrated operational amplifier with programmable-gain amplifier (PGA)

• Two ultra-low-power comparators

• Integrated LCD driver supporting up to 8 × 48 or 4 × 52 segments

• USB Full-Speed connectivity

• Multiple I²C, USART and SPI communication interfaces

• Real-time clock (RTC)

• General-purpose timers and watchdog timers

• CRC calculation unit

• 96-bit unique device ID

• Multiple low-power operating modes

• Supply voltage from 1.71V to 3.6V

• Operating temperature from -40°C to +85°C

• UFQFPN-32 package

• ECOPACK2 compliant

These features are based on the STM32U073 family documentation. Peripheral availability and pin assignments should be confirmed against the official datasheet.

Technical Specifications

The official ST product page confirms the UFQFPN-32 package, industrial grade, ECOPACK2 compliance and active product status for the exact STM32U073KCU6 ordering variant.

Processor & Architecture

The STM32U073KCU6 integrates a 32-bit Arm Cortex-M0+ processor operating at up to 56 MHz. This processor provides an efficient computing platform for applications that require responsive control while maintaining low power consumption.

The MCU integrates Flash memory, SRAM, analog peripherals, timers and communication interfaces on a single chip, helping reduce external component requirements and simplify embedded hardware designs.

Its architecture is suitable for applications such as sensor monitoring, display control, measurement equipment and energy-conscious embedded systems.

Memory & Storage

The STM32U073KCU6 provides integrated memory resources for firmware and application data.

• 256KB embedded Flash memory

• 40KB SRAM

• Hardware SRAM parity checking

• Proprietary code readout protection

• Flash protection features

• CRC calculation unit

• 96-bit unique device ID

The integrated memory supports application firmware, configuration data, communication protocols and real-time processing. Hardware parity checking helps detect certain SRAM data errors, improving data-integrity monitoring.

Analog Peripherals

The STM32U073KCU6 integrates analog peripherals for measurement, signal conditioning and control applications.

• One 12-bit ADC

• ADC conversion time as low as 0.4 µs

• Hardware oversampling for improved effective resolution

• One 12-bit DAC output channel

• Low-power DAC sample-and-hold capability

• One operational amplifier with integrated PGA

• Two ultra-low-power comparators

• Internal voltage-reference support

These resources support sensor interfaces, battery monitoring, analog signal conditioning, voltage measurement and embedded control loops. Refer to the datasheet for ADC channel availability, analog input limits and accuracy specifications.

Timer & PWM Resources

The STM32U073KCU6 provides timer resources for timing, waveform generation and event measurement.

• General-purpose timers

• Basic timing and counting functions

• PWM generation on supported timer channels

• Input capture and output compare on supported timers

• Real-time clock with alarm and wake-up functions

• Independent watchdog

• System tick timer

These resources support time-based control, periodic measurements, pulse generation and application scheduling. Exact timer counts and channel assignments should be verified in the official datasheet.

Communication & Connectivity

The STM32U073KCU6 integrates communication interfaces for connecting external sensors, displays, memory devices and controllers.

• USB Full-Speed interface

• I²C interfaces

• USART interfaces

• SPI interfaces

• Serial Wire Debug (SWD)

• GPIO-based communication options

The integrated USB peripheral supports USB-connected embedded applications. Actual interface availability and pin assignments depend on package configuration and peripheral multiplexing.

Clock & Power Management

The STM32U073KCU6 includes clock-generation and reset-management resources designed for low-power operation.

• Internal high-speed oscillator

• Internal low-speed oscillator

• External crystal oscillator support

• Phase-locked loop (PLL) clock generation

• Power-on reset

• Power-down reset

• Programmable voltage monitoring

• Peripheral clock management

• RTC clock and backup functions

These features allow developers to configure clock sources according to performance, timing and power-consumption requirements.

Low-Power Operation

The STM32U073KCU6 is designed for applications that require energy-efficient processing.

• Sleep mode

• Stop mode

• Standby mode

• Low-power RTC operation

• Peripheral clock control

• Low-power analog peripherals

• LCD operation for display-based applications

• Wake-up support from selected events and peripherals

These capabilities make the MCU suitable for battery-powered instruments, smart meters, portable equipment and other embedded devices that spend extended periods in low-power states.

Power Management

The STM32U073KCU6 operates from a supply voltage of 1.71V to 3.6V.

• Supply voltage: 1.71V to 3.6V

• Power-on reset

• Power-down reset

• Programmable voltage monitoring

• Peripheral clock gating

• Multiple low-power operating modes

• Low-power RTC functions

Power-supply design should follow STMicroelectronics' recommendations for decoupling, grounding and PCB layout. Refer to the datasheet for detailed current consumption and electrical limits.

Security & Data Integrity

The STM32U073KCU6 includes features that support firmware protection and data integrity.

• Flash readout protection

• Flash memory protection

• Hardware SRAM parity checking

• CRC calculation unit

• 96-bit unique device ID

• Reset and voltage-monitoring functions

These features help protect embedded firmware and detect certain data-integrity issues. They should not be interpreted as equivalent to the advanced security architecture of STM32 families with dedicated TrustZone or hardware cryptographic accelerators.

Development & Debugging

The STM32U073KCU6 is supported by the STM32 development ecosystem, including configuration tools, firmware libraries and debugging hardware.

Development resources include:

• STM32CubeIDE

• STM32CubeMX

• STM32CubeU0 software package

• ST-LINK programming and debugging tools

• Serial Wire Debug (SWD)

• Official datasheets and reference manuals

• Application notes and firmware examples

These tools help engineers configure peripherals, develop firmware and optimize power consumption in STM32U0-based designs.

Applications

The STM32U073KCU6 is suitable for applications such as:

• Smart meters

• Energy monitoring

• Consumer electronics

• Battery-powered instruments

• Portable measurement equipment

• LCD-based user interfaces

• Industrial monitoring

• Sensor systems

• Home appliances

• USB-connected devices

• Building automation

• Low-power IoT endpoints

Benefits

• Low-power 56 MHz Cortex-M0+ processing

• 256KB Flash memory

• 40KB SRAM with hardware parity checking

• Integrated LCD controller

• USB Full-Speed connectivity

• 12-bit ADC and DAC resources

• Integrated operational amplifier and comparators

• Multiple serial communication interfaces

• RTC and timer resources

• Multiple low-power modes

• Compact UFQFPN-32 package

• Industrial operating temperature range

• Mature STM32 development ecosystem

Packaging & Ordering Information

• Part Number: STM32U073KCU6

• Manufacturer: STMicroelectronics

• Device Family: STM32U073KC

• Package: UFQFPN-32

• Package Code: UFQFPN32

• Package Size: 5 × 5 × 0.55 mm

• Packing Type: Tray

• Supply Voltage: 1.71V to 3.6V

• Operating Temperature: -40°C to +85°C

• Product Status: Active

• Grade: Industrial

• RoHS: ECOPACK2

STMicroelectronics lists the exact STM32U073KCU6 as an active product in volume production with a UFQFPN-32 package. The separate STM32U073KCU6TR ordering variant has a different packing designation and should not replace the exact requested part number.

Datasheet

For complete electrical characteristics, pin configuration, memory architecture, ADC specifications, timer configuration, communication interfaces, absolute maximum ratings, and application information, please refer to the official STMicroelectronics documentation.

Datasheet: Official STM32U073KCU6 Datasheet

Frequently Asked Questions

What is the STM32U073KCU6?

The STM32U073KCU6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics featuring an Arm Cortex-M0+ core, 56 MHz CPU, 256KB Flash, 40KB SRAM, LCD controller and USB connectivity.

What is the maximum CPU frequency?

The maximum CPU frequency is 56 MHz.

How much Flash memory does the STM32U073KCU6 have?

It provides 256KB of embedded Flash memory.

How much SRAM does the STM32U073KCU6 have?

It provides 40KB of SRAM with hardware parity checking.

Does the STM32U073KCU6 support an LCD?

Yes. It integrates an LCD driver supporting up to 8 × 48 or 4 × 52 segments, subject to configuration.

What analog peripherals does it include?

It includes a 12-bit ADC, a 12-bit DAC output channel, an operational amplifier with integrated PGA and two ultra-low-power comparators.

What package does the STM32U073KCU6 use?

The exact part uses a UFQFPN-32 package measuring 5 × 5 × 0.55 mm.

What is its operating voltage?

The specified supply-voltage range is 1.71V to 3.6V.

What is its operating temperature range?

The STM32U073KCU6 is specified for operation from -40°C to +85°C.

Is the STM32U073KCU6 an active product?

Yes. STMicroelectronics lists the exact ordering variant as active and in volume production.

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