STMicroelectronics STM32L073VBT6TR

Overview

STM32L073VBT6TR 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), dual 12-bit DACs, and 12-bit ADC (1.14 Msps). It operates from 1.65 V to 3.6 V across –40 °C 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 STM32L073VBT6TR datasheet, STM32L073VBT6TR pinout, STM32L073VBT6TR application, or STM32L073VBT6TR equivalent, key selection criteria include ultra-low-power Stop mode current (0.43 µA), 5 µs Flash wakeup time, 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 STM32L073VBT6TR implements a dual-bank Flash architecture enabling read-while-write operation and includes an integrated 48 MHz RC oscillator calibrated for USB timing without external crystal. Its low-power design integrates multiple clock sources - including 32 kHz RTC oscillator with calibration, 16 MHz HSI16 ±1%, and multispeed MSI (65 kHz–4.2 MHz) - managed via dynamic voltage scaling and autonomous peripheral clock gating.

It features a full interconnect matrix supporting concurrent DMA transfers across ADC, DAC, timers, and communication peripherals. The device embeds true random number generation (RNG), CRC calculation unit, 96-bit unique ID, and firewall protection for secure firmware execution - all operating within the same ultra-low-power envelope as its analog and timing subsystems.

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 STM32L073VBT6TR adds USB crystal-less and LCD driver at modest cost premium; versus STM32L432KCU6, it trades peak performance for significantly lower standby current and integrated analog peripherals - making it optimal for long-life, sensor-centric edge nodes.

Availability

STM32L073VBT6TR 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 STM32L073VBT6TR 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, analog, MEMS, and automotive ICs.

The STM32L0 series is designed for ultra-low-power embedded applications demanding extended battery life, integrated analog functionality, and robust security - targeting IoT edge nodes, wearables, and industrial monitoring systems.

FAQ

What is the maximum operating frequency and core type of the STM32L073VBT6TR?

The STM32L073VBT6TR uses an Arm Cortex-M0+ core with memory protection unit (MPU) and operates at up to 32 MHz. It delivers 0.95 DMIPS per MHz and supports dynamic voltage scaling to optimize power versus performance. The core is factory-trimmed for 16 MHz HSI accuracy (±1%) and includes hardware divide and single-cycle I/O support.

Does the STM32L073VBT6TR support crystal-less USB operation?

Yes - it integrates a factory-calibrated 48 MHz RC oscillator (HSI48) with automatic trimming against the USB SOF signal, achieving ±0.25% accuracy over temperature and voltage. This eliminates the need for an external 48 MHz crystal, reducing BOM count and PCB area while maintaining full USB 2.0 Full-Speed compliance.

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

The STM32L073VBT6TR provides up to 84 fast I/Os in the LQFP100 package, of which 78 are 5V tolerant. These pins support multiple alternate functions including USB, LCD, ADC, DAC, and capacitive touch sensing. All 5V-tolerant I/Os operate safely with input voltages up to 5.5 V regardless of VDD level.

What low-power modes are supported, and what is the lowest achievable current draw?

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