STMicroelectronics STM32L073VZI6

Overview

STM32L073VZI6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFBGA100 (7×7 mm) package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, integrated LCD driver, USB 2.0 (crystal-less), dual 12-bit DACs, and 12-bit ADC (1.14 Msps). It operates from 1.65–3.6 V across –40 to +125 °C and targets battery-powered industrial sensors and portable medical devices requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L073VZI6 datasheet, STM32L073VZI6 pinout, STM32L073VZI6 application, or STM32L073VZI6 equivalent, key selection criteria include standby current (0.29 µA), RTC-enabled stop mode (0.86 µA), USB crystal-less operation, LCD segment drive capability (4×52), and dual DAC output buffering down to 1.8 V.

Technical Context

The STM32L073VZI6 integrates a Cortex-M0+ core with MPU, running up to 32 MHz via PLL or internal 16 MHz HSI RC (+/-1%), and supports dynamic voltage scaling for optimized power/performance trade-offs. Its interconnect matrix enables concurrent peripheral access without bus contention.

It implements five low-power modes-Run, Sleep, Low-power Run, Stop, and Standby-with hardware-accelerated wakeup from Stop/Standby using up to 16 lines or 3 pins, and includes a self-calibrating 48 MHz HSI48 RC oscillator dedicated to USB timing compliance.

Key Specifications

Pinout & Package

STM32L073VZI6 is housed in a 100-pin Ultra-Fine-Pitch Ball Grid Array (UFBGA100) package with 0.5 mm ball pitch and 7×7 mm body size. This package supports high I/O density (up to 84 fast I/Os, 78 of which are 5V-tolerant) and thermal performance suitable for compact, battery-operated designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M0+ microcontroller applications.

Compared with STM32L073VZI6, STM32L072VZT6 reduces feature set to lower cost and power in non-display applications, while STM32L433RCT6 shifts focus to compute density at the expense of ultra-low-power efficiency - making STM32L073VZI6 optimal for display-integrated, battery-constrained edge devices.

Availability

STM32L073VZI6 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 STM32L073VZI6 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 chips for industrial, automotive, and consumer markets.

The STM32L0 series is ST's entry-level ultra-low-power MCU line built on the Cortex-M0+ core, specifically engineered for energy-harvesting and coin-cell-powered applications demanding sub-µA sleep currents and rich analog integration without external support components.

FAQ

What is the minimum operating voltage for the STM32L073VZI6's ADC and DAC peripherals?

The 12-bit ADC operates down to 1.65 V supply (VDDA), maintaining full 1.14 Msps sampling rate and <±1 LSB INL. Both 12-bit DACs function with output buffers enabled at VDD ≥ 1.8 V, delivering rail-to-rail output swing and monotonicity across the full range. Below these thresholds, analog accuracy degrades per DS10685 Rev 7 Section 6.3.15 and 6.3.16.

Does the STM32L073VZI6 support crystal-less USB operation out of the box?

Yes - the STM32L073VZI6 integrates a factory-trimmed 48 MHz HSI48 RC oscillator with automatic self-calibration against the USB Start-of-Frame (SOF) token, enabling full-speed USB 2.0 communication without an external crystal. This is confirmed in Section 3.5 and Table 48 of DS10685 Rev 7, and requires no user firmware calibration.

How many GPIOs on the STM32L073VZI6 are 5V-tolerant, and which pins support this?

78 of the 84 GPIOs are 5V-tolerant, covering all pins in ports A through E and H except PA13, PA14, PA15, and PB3–PB4 (SWD/JTAG debug pins). This is explicitly stated in Section 2.1 and Table 2 of DS10685 Rev 7, and verified in the "I/O static characteristics" table (Table 60) where V_IH max = 5.5 V for those pins.

Can the STM32L073VZI6 retain full 20 KB SRAM content during Stop mode with RTC active?

Yes - in Stop mode with RTC enabled and VDD powered, the STM32L073VZI6 retains all 20 KB of SRAM content while consuming only 0.86 µA typical (DS10685 Rev 7, Section 3.1 and Table 37). This is achieved via dedicated SRAM power gating control and requires setting the SRR bit in the PWR_CR register before entering Stop mode.