STMicroelectronics STM32U083HCY6TR

Overview

STM32U083HCY6TR 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 825 nA Stop 2 mode current with RTC enabled - optimized for battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM32U083HCY6TR datasheet, STM32U083HCY6TR pinout, STM32U083HCY6TR application, or STM32U083HCY6TR equivalent, key selection criteria include verified VBAT-mode current (130 nA), 69 GPIO count with 5 V tolerance, 12-bit ADC conversion time (0.4 µs), AES-128/256 hardware acceleration, and WLCSP42 package compatibility with space-constrained PCB layouts.

Technical Context

The STM32U083HCY6TR integrates an ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, paired with a 1-Kbyte instruction cache and deterministic NVIC interrupt handling. Its power architecture uses dual regulators (MR/LPR) and supports six low-power modes - including Shutdown (16 nA), Standby (30 nA without RTC), and Stop 2 (695 nA without RTC) - all validated across −40 °C to +125 °C ambient.

Analog subsystem independence is enforced via separate VDDA (1.62–3.6 V) and VREF+ (2.048 V or 2.5 V) supplies, enabling simultaneous operation of 12-bit ADC (16-channel oversampling), 12-bit DAC, two rail-to-rail comparators, and one PGA-equipped op-amp - all with hardware parity-checked SRAM and robust RDP Level 2 protection.

Key Specifications

Pinout & Package

STM32U083HCY6TR is housed in a 42-ball WLCSP (Wafer-Level Chip Scale Package) measuring 2.82 × 2.93 mm with 0.4 mm ball pitch, compliant with ECOPACK2 environmental standards. The package supports solder reflow per JEDEC J-STD-020 and offers 69 GPIOs (68 usable in WLCSP42 configuration), with most pins 5 V-tolerant and six dedicated wake-up inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L083RCZ6 and RA4M2NGB20FBC, the STM32U083HCY6TR uniquely combines crystal-less USB, integrated LCD driver, and industry-leading 16 nA shutdown current - making it the only choice for compact, long-life, display-enabled IoT endpoints requiring certified security and analog integration.

Availability

STM32U083HCY6TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial predictive maintenance nodes, and smart building occupancy sensors requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32U083HCY6TR 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 products for industrial, automotive, and consumer markets.

The STM32U0 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and hardware security - specifically engineered for space-constrained, cost-sensitive IoT endpoints where every nanoamp and square millimeter matters.

FAQ

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

The STM32U083HCY6TR operates at up to 56 MHz using its internal 48 MHz MSI oscillator with PLL. In Run mode with LDO regulator active, it consumes 52 µA/MHz - measured at 3.3 V and 25 °C. This value scales linearly with frequency and is validated across the full −40 °C to +125 °C temperature range per DS14463 Rev 2 Section 6.3.1.

Does the WLCSP42 package support all 69 GPIOs listed in the datasheet?

No. The WLCSP42 package provides 42 balls, limiting accessible GPIOs to 33 pins (including power, reset, and debug). The full 69 GPIO count applies to larger packages like LQFP80 and UFBGA81. Pin mapping for WLCSP42 is defined in Table 10 of DS14463 Rev 2, with specific allocations for USB, LPUART, and capacitive sensing functions.

How does the crystal-less USB interface maintain timing accuracy without an external 48 MHz crystal?

The crystal-less USB relies on ST's proprietary clock recovery system (CRS) synchronized to the USB SOF packet stream. It uses the internal 48 MHz MSI oscillator auto-trimmed by the 32 kHz LSE crystal, achieving ±0.25% accuracy - sufficient for USB full-speed compliance. This eliminates external crystal load capacitors and reduces bill-of-materials cost.

Is the 12-bit DAC output capable of driving standard audio codecs or operational amplifier inputs directly?

Yes. The integrated 12-bit DAC features a low-power sample-and-hold circuit and rail-to-rail output swing. It can directly drive op-amp inputs (e.g., PGA stage) or audio codec reference inputs with ≤10 kΩ load impedance. Output buffer gain and settling time (10 µs to 0.1%) are specified in DS14463 Rev 2 Section 6.4.3, confirming suitability for sensor calibration and analog stimulus generation.