STMicroelectronics STM32L073VZT6

Overview

STM32L073VZT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP100 package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, integrated LCD driver (4×52/8×48 segments), USB 2.0 crystal-less interface, and dual 12-bit DACs with output buffers. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 93 µA/MHz in Run mode - ideal for battery-powered industrial sensors and portable medical devices with on-board display.

For engineers reviewing the STM32L073VZT6 datasheet, STM32L073VZT6 pinout, STM32L073VZT6 application, or STM32L073VZT6 equivalent, key selection criteria include its 192 KB Flash memory with read-while-write capability, dual DACs supporting analog waveform generation down to 1.8 V, ultra-low-power Stop mode (0.43 µA), USB crystal-less operation, and 78 5V-tolerant I/Os - all critical for energy-constrained embedded designs requiring mixed-signal integration and display control.

Technical Context

The STM32L073VZT6 implements a dual-bank Flash architecture enabling seamless firmware updates without halting execution, paired with an MPU for memory protection in safety-aware applications. Its clock system integrates factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC - supporting dynamic voltage scaling and multiple low-power modes including Stop+RTC+20 KB RAM retention at 0.86 µA.

Analog subsystem integration includes a 12-bit ADC (1.14 Msps, 16 channels, operational down to 1.65 V), two independent 12-bit DACs with rail-to-rail buffered outputs, and two ultra-low-power comparators with window mode and wake-up capability - all sharing common voltage domain management and calibrated internal references (VREFINT, temperature sensor).

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 STM32L073VZT6 adds USB crystal-less and LCD support at identical footprint; versus STM32L433RCT6, it trades computational headroom for 3× lower Stop-mode current and integrated display control - making it optimal for long-life, display-equipped edge sensors.

Availability

STM32L073VZT6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial sensor nodes, and asset tracking beacons requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L073VZT6 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, specializing in microcontrollers, power management, sensors, and automotive ICs - with over 40 years of innovation in embedded systems.

The STM32L0 series targets ultra-low-power applications demanding extended battery life, integrated analog peripherals, and robust security features - designed specifically for IoT edge nodes, wearables, and industrial monitoring systems operating across wide temperature ranges.

FAQ

What is the maximum operating frequency and core type of the STM32L073VZT6?

The STM32L073VZT6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz. Its maximum frequency is constrained by supply voltage and temperature: 32 MHz is supported at 3.0–3.6 V and ambient temperatures up to +85 °C, with derating to 24 MHz at 1.8–2.4 V. The core includes a Memory Protection Unit (MPU) for secure task isolation in RTOS environments.

Does the STM32L073VZT6 support crystal-less USB operation, and what are the requirements?

Yes, the STM32L073VZT6 supports crystal-less USB 2.0 Full-Speed operation using its internal 48 MHz HSI48 oscillator, which is factory-calibrated and self-tuned via the Clock Recovery System (CRS). No external crystal or oscillator is required; only standard USB_DP/USB_DM routing with 27 Ω series resistors and proper PCB impedance control (90 Ω differential) are needed for compliance.

How many I/O pins are 5V tolerant, and which packages support this feature?

78 of the 84 fast I/Os on the STM32L073VZT6 are 5V tolerant, confirmed across all package variants including LQFP100 (VZT6), LQFP64, UFBGA100, and TFBGA64. This tolerance applies regardless of VDD level (1.65–3.6 V) and enables direct interfacing with legacy 5V logic without level shifters - critical for industrial control and mixed-voltage system integration.

What LCD configurations does the integrated controller support, and what external components are required?

The integrated LCD controller supports up to 4 commons × 52 segments or 8 commons × 48 segments, with programmable contrast, blinking, and on-chip step-up converter (VLCD generation). No external bias resistor network or charge pump IC is required - only VLCD capacitor (1 µF ceramic) and segment/common traces routed per layout guidelines. Contrast is adjustable via software-controlled voltage divider taps.