STMicroelectronics STM32L073VBT6

Overview

STM32L073VBT6 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, USB 2.0 (crystal-less), and dual 12-bit DACs. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 0.86 µA Stop mode + RTC with 20 KB RAM retention-ideal for battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM32L073VBT6 datasheet, STM32L073VBT6 pinout, STM32L073VBT6 application, or STM32L073VBT6 equivalent, key selection criteria include ultra-low-power mode current (0.29 µA Standby), 12-bit ADC performance (1.14 Msps, 16 channels), USB crystal-less operation, LCD segment drive capability (up to 4×52), and dual DAC output buffering down to 1.8 V.

Technical Context

The STM32L073VBT6 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and clock gating to enable multiple low-power modes-including Stop mode with RTC and RAM retention, and Standby with 3 wakeup pins. Its interconnect matrix routes peripherals like USB, ADC, DACs, and LCD controller independently to avoid bus contention during sleep transitions.

It features a multi-source clock system: HSE (1–25 MHz), LSE (32 kHz RTC), HSI16 (16 MHz ±1%), HSI48 (48 MHz self-calibrated for USB), and MSI (65 kHz–4.2 MHz). The PLL supports CPU clock up to 32 MHz, while the CRS unit synchronizes USB timing without external crystal.

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 STM32L072VBT6, the STM32L073VBT6 adds USB, LCD, and dual DACs at identical package and price tier-making it optimal for display-enabled, battery-powered edge devices. Versus STM32L433RCT6, it trades computational headroom for superior ultra-low-power efficiency, especially in long-duration standby scenarios.

Availability

STM32L073VBT6 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 STM32L073VBT6 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 ICs, sensors, and automotive semiconductors since 1987.

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

FAQ

What is the minimum supply voltage for full functionality including ADC and DAC operation?

The STM32L073VBT6 maintains full ADC and DAC functionality down to 1.65 V and 1.8 V respectively. The 12-bit ADC operates with 1.14 Msps sampling rate and 16-channel multiplexing at 1.65 V, while both DACs deliver rail-to-rail buffered output starting at 1.8 V-enabling reliable analog performance across the entire specified 1.65–3.6 V supply range.

Does the STM32L073VBT6 support true hardware AES encryption?

No, the STM32L073VBT6 does not include a dedicated AES accelerator. It provides True Random Number Generator (TRNG) and firewall protection for secure boot and memory isolation, but cryptographic operations such as AES must be implemented in software using the Cortex-M0+ core-suitable for lightweight security requirements like key derivation or challenge-response authentication.

Can the internal 48 MHz RC oscillator meet USB full-speed timing accuracy without external calibration?

Yes-the HSI48 oscillator is factory-trimmed and continuously calibrated via the Clock Recovery System (CRS) using the USB SOF packet as reference. This achieves ±0.25% accuracy over temperature and voltage, satisfying USB full-speed (12 Mbps) timing requirements without any external crystal or trim capacitor.

How many GPIOs support capacitive touch sensing, and what is the maximum channel count?

The STM32L073VBT6 supports up to 24 capacitive sensing channels using its integrated Touch Sensing Controller (TSC), with dedicated GPIOs mapped across ports A, B, C, D, E, and H. Channel allocation is configurable in hardware, enabling simultaneous touchkey, linear slider, or rotary encoder implementations without CPU overhead.