STMicroelectronics STM32U073M8T6

Overview

STM32U073M8T6 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 operation without maintenance.

For engineers reviewing the STM32U073M8T6 datasheet, STM32U073M8T6 pinout, STM32U073M8T6 application, or STM32U073M8T6 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, LCD driver (8×48 segments), and dual 5 V-tolerant GPIO banks supporting capacitive touch sensing across 21 channels.

Technical Context

The STM32U073M8T6 integrates a Cortex-M0+ core with ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, delivering 1.13 DMIPS/MHz and 134 CoreMark®. Its power architecture combines main and low-power regulators (MR/LPR) to support six distinct low-power modes - including Shutdown (16 nA), Standby (30 nA w/o RTC), and Stop 2 (695 nA w/o RTC).

Analog subsystem includes independent VDDA supply, one 12-bit DAC with sample-and-hold, two ultra-low-power comparators, one rail-to-rail op-amp with programmable gain amplifier (PGA up to ×16), and a 12-bit ADC with hardware oversampling up to 16-bit resolution - all supported by dedicated analog domain clocking and voltage supervision.

Key Specifications

Pinout & Package

LQFP80 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; 80-pin layout supporting full peripheral mapping including USB DP/DM, LCD COM/SEG, VREF+, VBAT, and five tamper detection inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L073RZT6 and RA4M2N20FJBE, the STM32U073M8T6 uniquely balances sub-100 nA shutdown, crystal-less USB, and integrated LCD driving - making it optimal for compact, long-life, human-interface-equipped edge sensors where BOM count and battery longevity are critical.

Availability

STM32U073M8T6 is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial predictive maintenance sensors, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for STM32U073M8T6 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 analog devices for industrial, automotive, and consumer markets.

The STM32U0 series targets ultra-low-power embedded applications demanding extended battery life, integrated human interface (LCD/touch), and secure connectivity - with emphasis on certified functional safety and cryptographic readiness for IoT endpoints.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM32U073M8T6 operates up to 56 MHz in Run mode with LDO regulator enabled, consuming 52 μA/MHz. At full speed, this equates to approximately 2.91 mA total core current, excluding peripheral activity. The ART Accelerator ensures zero-wait-state flash execution, maintaining deterministic timing without performance throttling.

Does the device support true hardware-based secure boot and cryptographic acceleration?

Yes - it implements secure boot with immutable root-of-trust, verified against stored hash in securable flash region. While it lacks dedicated AES hardware, its TRNG is NIST SP 800-90B candidate and supports PSA Level 1/SESIP Level 3 certifications. Cryptographic operations rely on software libraries optimized for Cortex-M0+ with MPU-enforced memory isolation.

Can the integrated LCD driver operate without external components?

Yes - the LCD controller includes an internal step-up converter and supports 8×48 or 4×52 segment drive directly from VDD. No external bias generator, resistors, or capacitors are required for basic monochrome segment display, reducing BOM count and layout complexity in space-constrained designs.

How many GPIOs are available in the LQFP80 package and what voltage tolerance do they support?

The LQFP80 package provides 68 GPIOs (with one additional pin used for BOOT0), and 69 pins support alternate functions. Most GPIOs are 5 V-tolerant when VDD is ≥ 2.0 V, enabling direct interfacing with legacy 5 V peripherals without level shifters - confirmed in Section 6.1.2 of DS14548 Rev 2.