STMicroelectronics STM32L073VZT3

Overview

STM32L073VZT3 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, integrated LCD driver, USB 2.0 (crystal-less), and dual 12-bit DACs - deployed in battery-powered industrial sensors and portable medical devices requiring sub-1 µA Stop mode operation and 5 µs Flash wakeup.

For engineers reviewing the STM32L073VZT3 datasheet, STM32L073VZT3 pinout, STM32L073VZT3 application, or STM32L073VZT3 equivalent, key selection criteria include verified 0.86 µA Stop mode + RTC + 20-KB RAM retention, 12-bit ADC at 1.14 Msps (16 channels), and LQFP100 package compatibility with 84 fast I/Os (78 5V-tolerant).

Technical Context

This MCU implements a dual-bank Flash architecture enabling read-while-write operation and hardware ECC for fault resilience. Its clock system integrates factory-trimmed 16 MHz HSI, self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC - all managed via programmable PLL and dynamic voltage scaling across Run, Sleep, Stop, and Standby modes.

The peripheral interconnect matrix supports concurrent DMA-driven operations across ADC, DAC, USART, SPI, I²C, and USB; the ultra-low-power comparators operate down to 1.65 V with window mode and wake-up capability, while the TSC supports up to 24 capacitive sensing channels for touchkey and rotary control.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch), 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 STM32L072VZT3, the STM32L073VZT3 adds USB, LCD, and dual DACs without increasing package size or standby current; versus STM32L433RCT6, it delivers 3× lower Stop-mode power and integrated EEPROM at the cost of no FPU and reduced compute bandwidth.

Availability

STM32L073VZT3 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L073VZT3 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 STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, secure firmware execution, and rich analog integration - optimized for IoT edge nodes and portable instrumentation.

FAQ

What is the maximum operating frequency and core type of the STM32L073VZT3?

The STM32L073VZT3 features an Arm Cortex-M0+ core rated for up to 32 MHz operation. It delivers 0.95 DMIPS per 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 performance derating.

Does the STM32L073VZT3 support crystal-less USB operation?

Yes - the STM32L073VZT3 integrates a self-calibrating 48 MHz HSI48 RC oscillator dedicated to USB 2.0 full-speed operation, eliminating the need for an external crystal. It supports battery charging detection (BCD) and Link Power Management (LPM), and has been validated per USB-IF compliance tests for crystal-less enumeration.

How many I/O pins are 5V tolerant, and what is the total GPIO count?

The STM32L073VZT3 provides 84 fast I/Os in the LQFP100 package, of which 78 are 5V tolerant across all operating modes. This allows direct interfacing with legacy 5V logic, sensors, and displays without external level shifters - confirmed in Section 6.3.13 of DS10685 Rev 7.

What are the key low-power mode current specifications at 25 °C?

At 25 °C, typical currents are: 93 µA/MHz in Run mode; 0.43 µA in Stop mode (16 wakeup lines); 0.86 µA in Stop mode with RTC and 20 KB RAM retention; and 0.29 µA in Standby mode (3 wakeup pins). All values are measured with VDD = 3.3 V and include internal regulator losses - per Table 37 and Table 38 of DS10685 Rev 7.