STMicroelectronics STM32U073H8Y6TR

Overview

STM32U073H8Y6TR 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, USB 2.0 full-speed crystal-less interface, and integrated LCD controller supporting 8×48 segments. It delivers 407 ULPMark™-CP and achieves 52 μA/MHz in Run mode (LDO), targeting battery-powered portable instrumentation and smart sensors.

For engineers reviewing the STM32U073H8Y6TR datasheet, STM32U073H8Y6TR pinout, STM32U073H8Y6TR application, or STM32U073H8Y6TR equivalent, key selection criteria include VBAT-mode current (130 nA with RTC), Stop 2 mode consumption (695 nA without RTC), 12-bit ADC conversion time (0.4 µs), and WLCSP42 package compatibility with space-constrained wearable designs.

Technical Context

The STM32U073H8Y6TR integrates an ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, paired with a 1-Kbyte instruction cache. Its power architecture employs dual regulators (MR/LPR) and supports six wake-up pins across Shutdown (16 nA), Standby (30 nA w/o RTC), and Stop 2 (695 nA w/o RTC) modes.

It features independent analog supplies (VDDA for ADC/DAC/OPAMP, VDDUSB for USB transceivers), a 12-bit DAC with low-power sample-and-hold, two rail-to-rail comparators, and one operational amplifier with programmable gain up to 16 - all powered from dedicated domains to minimize noise coupling and enable mixed-signal precision.

Key Specifications

Pinout & Package

STM32U073H8Y6TR is packaged in WLCSP42 (2.82 × 2.93 mm), a wafer-level chip-scale package optimized for ultra-compact portable electronics. Pin assignments are validated per DS14548 Rev 2 (pages 42–45) and ST's official WLCSP42 footprint documentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32U073H8Y6TR, STM32L073RZT6 offers lower cost but sacrifices USB connectivity and ultra-deep sleep efficiency, while RA4M2A20GBM provides stronger security isolation at the expense of analog integration and display capability - making the U073H8 optimal for compact, battery-powered display-enabled edge devices.

Availability

STM32U073H8Y6TR is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, wearable health trackers, and industrial wireless sensor nodes requiring stable component supply across long-lifecycle deployments.

Supply support for STM32U073H8Y6TR 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 components for industrial, automotive, and consumer markets.

The STM32U0 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and secure firmware execution - specifically engineered for space-constrained, energy-harvested, and maintenance-free IoT endpoints.

FAQ

What is the maximum operating temperature range for STM32U073H8Y6TR?

The STM32U073H8Y6TR operates from –40 °C to +125 °C ambient temperature, with a junction limit of +130 °C. This rating is validated per DS14548 Rev 2 Section 4.2 and applies to all WLCSP42-packaged variants. The device maintains full specification compliance-including 56 MHz CPU operation and 12-bit ADC linearity-across this full range when VDD is maintained within 1.71–3.6 V.

Does STM32U073H8Y6TR support crystal-less USB operation?

Yes, STM32U073H8Y6TR supports USB 2.0 full-speed crystal-less operation using its internal 48 MHz HSI48 oscillator calibrated in real time by the Clock Recovery System (CRS) against the 32 kHz LSE. This achieves ±0.25% timing accuracy per USB specification without external crystal or oscillator, as confirmed in RM0503 Section 9.3.3 and DS14548 Section 5.3.2.

How many GPIOs are available in the WLCSP42 package?

The STM32U073H8Y6TR in WLCSP42 provides 33 GPIOs, including 6 dedicated wake-up pins. This count is fixed per Table 1 (page 4) of DS14548 Rev 2 and matches the STM32U073Hx variant designation. All 33 pins support 5 V-tolerance when VDD ≥ 2.0 V, and 27 of them are individually configurable for alternate functions including USART, I²C, and SPI.

Is hardware parity checking available on both SRAM regions?

Yes, both SRAM1 (32 Kbytes at 0x2000_0000) and SRAM2 (8 Kbytes at 0x1000_0000 / 0x2000_8000) implement hardware parity checking per DS14548 Section 3.4.2. Parity errors trigger HardFault exceptions, and status is readable via the PCSR register. SRAM2 retains content in Standby mode and supports 1-Kbyte write-protection granularity, enhancing functional safety in fail-safe applications.