STMicroelectronics STM32U073C8T6

Overview

STM32U073C8T6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M0+ 32-bit MCU 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 9×32-bit backup registers - ideal for battery-powered IoT sensor nodes and portable medical devices.

For engineers reviewing the STM32U073C8T6 datasheet, STM32U073C8T6 pinout, STM32U073C8T6 application, or STM32U073C8T6 equivalent, key selection criteria include its 16 nA shutdown current, 12-bit ADC with 0.4 µs conversion, 12-bit DAC with low-power sample-and-hold, 21-channel capacitive sensing, and ECOPACK2-compliant LQFP48 package.

Technical Context

The STM32U073C8T6 integrates an ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, coupled with a 1-Kbyte instruction cache. Its power architecture features dual regulators (MR/LPR) and six wake-up pins supporting four low-power modes - Shutdown (16 nA), Standby (30–160 nA), Stop 2 (695–825 nA), and Run (52 μA/MHz).

It embeds independent analog supplies (VDDA, VDDUSB, VBAT), a 32-bit multi-AHB bus matrix, and security features including RDP Level 2, HDP, secure boot, and NIST SP 800-90B-candidate TRNG. The Cortex-M0+ core includes MPU, NVIC, and deterministic interrupt handling for RTOS-based safety-critical firmware.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad; 48-pin layout optimized for low EMI and thermal dissipation in compact PCB designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L073RZT6 and RA4M1AFB, the STM32U073C8T6 uniquely combines sub-µA shutdown, crystal-less USB, LCD driver, and 21-channel capacitive sensing in a single LQFP48 package - delivering lowest system-level component count for battery-operated HMI and metering endpoints.

Availability

STM32U073C8T6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and low-power human-machine interfaces requiring stable component supply across extended product lifecycles.

Supply support for STM32U073C8T6 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, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive semiconductors since 1987.

The STM32U0 series targets ultra-low-power embedded applications demanding <1 µA shutdown current, secure firmware execution, and integrated analog peripherals - specifically engineered for battery-powered IoT endpoints and energy-conscious industrial controls.

FAQ

What is the maximum operating frequency and core type of the STM32U073C8T6?

The STM32U073C8T6 uses an Arm® Cortex®-M0+ 32-bit RISC core with a maximum CPU frequency of 56 MHz. It incorporates the ART Accelerator with 1-Kbyte instruction cache to achieve 0-wait-state execution from flash memory, delivering 1.13 DMIPS/MHz and 134 CoreMark® performance. This core supports Memory Protection Unit (MPU) and nested vectored interrupt controller (NVIC) for RTOS compatibility and deterministic real-time response.

Does the STM32U073C8T6 support crystal-less USB operation?

Yes, the STM32U073C8T6 integrates a USB 2.0 full-speed crystal-less PHY with built-in clock recovery, eliminating the need for an external 48 MHz crystal or oscillator. This feature reduces bill-of-materials cost and PCB footprint while maintaining ±0.25% timing accuracy over temperature and voltage. The USB interface supports Link Power Management (LPM) and Battery Charging Detection (BCD) for compliant host negotiation.

How many GPIOs and wake-up pins does the LQFP48 variant provide?

The STM32U073C8T6 in LQFP48 package provides 39 general-purpose I/Os, of which 6 are designated as wake-up pins capable of exiting low-power modes (Shutdown, Standby, Stop). These pins support configurable edge detection and can be mapped to EXTI lines for flexible interrupt routing. All GPIOs except those used for VDDA/VREF+ are 5 V-tolerant, simplifying level-shifting in mixed-voltage systems.

What analog peripherals are integrated and what are their key specifications?

The STM32U073C8T6 integrates a 12-bit ADC with 0.4 µs conversion time and hardware oversampling up to 16-bit resolution, a 12-bit DAC with low-power sample-and-hold, two ultra-low-power rail-to-rail comparators, one operational amplifier with programmable gain (1–16×), and an internal voltage reference buffer (2.048 V or 2.5 V). All analog blocks support independent VDDA supply (1.62–3.6 V) and hardware parity-checked SRAM for result storage.