STMicroelectronics STM32L073VZT6U

Overview

STM32L073VZT6U from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, 6 KB EEPROM, integrated LCD driver, USB 2.0 (crystal-less), and dual 12-bit DACs. It operates from 1.65–3.6 V across –40 to +125 °C, achieves 93 µA/MHz in Run mode, and supports capacitive touch sensing for battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM32L073VZT6U datasheet, STM32L073VZT6U pinout, STM32L073VZT6U application, or STM32L073VZT6U equivalent, key selection criteria include ultra-low-power operation down to 0.29 µA in Standby mode, 12-bit ADC at 1.14 Msps with 16 channels, dual buffered DACs, USB crystal-less capability, and 78 5V-tolerant I/Os in LQFP100 package.

Technical Context

The STM32L073VZT6U integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and multiple low-power modes including Stop mode with RTC + 20 KB RAM retention at 0.86 µA. Its clock system combines HSE (1–25 MHz), LSE (32 kHz), HSI16 (±1%), HSI48 (self-calibrated for USB), and MSI (65 kHz–4.2 MHz) with PLL for CPU clock generation.

Analog subsystem includes a 12-bit ADC (1.14 Msps, 16-channel, down to 1.65 V), two 12-bit DACs with output buffers (down to 1.8 V), two ultra-low-power comparators (window mode + wake-up, down to 1.65 V), and a 24-channel capacitive sensing controller - all optimized for single-supply battery operation without external references.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072VZT6, the STM32L073VZT6U adds USB and LCD at identical low-power envelope; versus STM32L433RCT6, it trades raw compute for 2.5× lower Run-mode current - critical for coin-cell or energy-harvesting systems.

Availability

STM32L073VZT6U is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and low-power HVAC controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32L073VZT6U 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong focus on energy efficiency and industrial reliability.

The STM32L0 series targets ultra-low-power embedded applications - designed specifically for battery-operated devices requiring multi-year runtime, robust analog integration, and secure firmware execution in harsh environments.

FAQ

What is the maximum operating frequency and core type of the STM32L073VZT6U?

The STM32L073VZT6U features an Arm Cortex-M0+ core rated for up to 32 MHz operation. It delivers 0.95 DMIPS/MHz and includes a Memory Protection Unit (MPU) for secure task isolation. The core supports Thumb-2 instruction set and operates across the full 1.65–3.6 V supply range without frequency derating.

Does the STM32L073VZT6U support crystal-less USB operation?

Yes - the STM32L073VZT6U integrates a factory-trimmed 48 MHz HSI48 RC oscillator with automatic self-calibration against USB SOF packets, enabling full-speed USB 2.0 communication without an external crystal. This reduces BOM cost and PCB area while maintaining ±0.25% accuracy over temperature and voltage.

How many I/O pins are 5V tolerant, and what is their voltage rating?

78 GPIO pins on the STM32L073VZT6U are 5V tolerant - specifically PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7, and PH0–PH1. These pins accept input voltages up to 5.5 V regardless of VDD level (1.65–3.6 V), enabling direct interfacing with 5V logic, sensors, and industrial control signals without external level shifters.

What low-power modes does the STM32L073VZT6U support, and what is the lowest current draw?

The STM32L073VZT6U supports six low-power modes: Low-power Run, Sleep, Low-power Sleep, Stop, Standby, and Shutdown. The lowest current is 0.29 µA in Standby mode with three wakeup pins enabled and RTC disabled. With RTC and 20 KB RAM retention active in Stop mode, consumption rises to 0.86 µA - verified across –40 to +125 °C per DS10685 Rev 7.