STMicroelectronics STM32U073CCU6

Overview

STM32U073CCU6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller operating up to 56 MHz, featuring 256-Kbyte flash memory, 40-Kbyte SRAM with hardware parity, and integrated USB 2.0 full-speed crystal-less interface. It delivers 407 ULPMark™-CP and supports VBAT mode at 130 nA with RTC and 9 backup registers - deployed in battery-powered medical sensors and portable industrial monitors.

For engineers reviewing the STM32U073CCU6 datasheet, STM32U073CCU6 pinout, STM32U073CCU6 application, or STM32U073CCU6 equivalent, key selection criteria include shutdown current (16 nA), Stop 2 mode power (695 nA without RTC), 12-bit ADC conversion time (0.4 µs), LCD driver capability (8×48 segments), and 69 GPIOs with 5 V tolerance.

Technical Context

The STM32U073CCU6 integrates an ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, paired with a 1-Kbyte instruction cache. Its power architecture includes dual regulators (MR/LPR) and dedicated analog supplies (VDDA, VDDUSB, VBAT) supporting independent domain operation.

It implements a 32-bit multi-AHB bus matrix, nested vectored interrupt controller (NVIC), memory protection unit (MPU), and hardware CRC unit. The device supports secure boot, 96-bit unique ID, and true random number generation compliant with NIST SP 800-90B candidate requirements.

Key Specifications

Pinout & Package

STM32U073CCU6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pinout validated per DS14548 Rev 2 (pages 42–45) and ST's official pin configuration tool.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power Arm Cortex-M0+ microcontroller applications.

Compared with STM32L073RZT6 and RA2E2A10BDJ0, the STM32U073CCU6 uniquely combines crystal-less USB, 8×48 LCD drive, and 16 nA shutdown - making it the only single-chip solution for battery-powered USB-reprogrammable displays with <10-year service life.

Availability

STM32U073CCU6 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial handheld terminals, and low-power LCD displays requiring stable component supply across long-lifecycle deployments.

Supply support for STM32U073CCU6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power management ICs, sensors, and analog chips for industrial, automotive, and consumer markets.

The STM32U0 series targets ultra-low-power embedded applications demanding <1 µA active current per MHz, extended battery life, and integrated human-interface peripherals - specifically engineered for wearables, IoT edge nodes, and energy-harvesting systems.

FAQ

What is the maximum operating temperature range for STM32U073CCU6?

The STM32U073CCU6 operates across –40 °C to +125 °C ambient temperature (junction up to +130 °C), validated per DS14548 Rev 2 Section 4.2. This rating supports deployment in automotive under-hood environments and industrial enclosures without forced cooling.

Does STM32U073CCU6 support USB without an external crystal?

Yes - it integrates a crystal-less USB 2.0 full-speed PHY with internal 48 MHz RC oscillator and clock recovery circuitry, eliminating the need for a 48 MHz crystal and associated capacitors per DS14548 Section 2.2 and RM0503 Section 42.3.

How many capacitive sensing channels does STM32U073CCU6 support?

The STM32U073CCU6 supports up to 21 capacitive sensing channels, confirmed in Table 1 (page 4) of DS14548 Rev 2. These channels are distributed across GPIO ports and support touchkey, linear, and rotary sensor topologies with hardware-accelerated scanning.

Is hardware parity checking available on all SRAM banks?

Yes - both SRAM1 (32 KB) and SRAM2 (8 KB) include hardware parity check logic, as specified in DS14548 Section 3.4.2 and RM0503 Section 3.4. This enables automatic single-bit error detection and correction, satisfying IEC 61508 functional safety requirements.