STMicroelectronics STM32U073CCT6

Overview

STM32U073CCT6 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 requiring long-term autonomous operation.

For engineers reviewing the STM32U073CCT6 datasheet, STM32U073CCT6 pinout, STM32U073CCT6 application, or STM32U073CCT6 equivalent, key selection criteria include its 16 nA shutdown current, 4 μs wake-up from Stop mode, 12-bit ADC with 0.4 µs conversion, and LQFP48 package compatibility with industrial-grade -40 °C to 125 °C ambient operation.

Technical Context

The STM32U073CCT6 integrates an ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, coupled with a dual-regulator power system (MR/LPR) that dynamically selects between main and low-power modes to sustain sub-µA sleep states. Its analog subsystem includes independent VDDA supply, a rail-to-rail op-amp with programmable gain up to 16, and two ultra-low-power comparators - all operable in Stop 2 mode (695 nA without RTC).

Security is implemented via robust RDP level 2 (irreversible), 96-bit unique ID, PSA Level 1 and SESIP Level 3 candidate certification, and five passive anti-tamper pins. Clock management combines four oscillators (HSE 4–48 MHz, LSE 32 kHz, HSI16 ±1%, MSI auto-trimmed to ±0.25%) with a PLL supporting USB, ADC, and system clock derivation.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L073RZT6 and RA4M2AFB20, the STM32U073CCT6 uniquely combines crystal-less USB, 30 nA Standby, and PSA-certified security in LQFP48 - making it the only choice for compact, secure, USB-configurable, decade-life battery devices.

Availability

STM32U073CCT6 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32U073CCT6 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The STM32U0 series targets ultra-low-power embedded applications demanding sub-µA sleep, secure boot, and integrated analog - specifically designed for battery-operated edge devices where energy autonomy and firmware trust are non-negotiable.

FAQ

What is the maximum operating temperature range for STM32U073CCT6?

The STM32U073CCT6 is rated for ambient operation from –40 °C to +125 °C, with junction temperature up to +130 °C. This rating applies across the full 1.71–3.6 V supply range and is validated per ST's qualification standards for industrial applications, including thermal cycling and high-temperature operating life testing.

Does STM32U073CCT6 support USB without an external crystal?

Yes - it integrates a crystal-less USB 2.0 full-speed PHY with internal clock recovery, eliminating the need for a 48 MHz external crystal or oscillator. The internal 48 MHz RC oscillator is auto-trimmed using the 32.768 kHz LSE, achieving ±0.25% accuracy required for USB frame timing compliance.

How many GPIOs are available in the LQFP48 package?

The STM32U073CCT6 in LQFP48 provides 39 general-purpose I/Os, of which 6 are designated as wakeup-capable pins. All GPIOs are 5 V-tolerant when VDD is ≥2.0 V, enabling direct interfacing with legacy 5 V logic without level shifters.

Is hardware parity checking available on both SRAM banks?

Yes - both SRAM1 (32 KB) and SRAM2 (8 KB) include hardware parity checking circuitry. Parity errors trigger a HardFault exception, allowing immediate detection and handling of memory corruption - a critical feature for IEC 61508 SIL-2 and ISO 26262 ASIL-B functional safety compliance.