STMicroelectronics STM32L073VBT7TR

Overview

STM32L073VBT7TR 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 - deployed in battery-powered industrial sensors and portable medical monitors requiring sub-1 µA Stop mode operation.

For engineers reviewing the STM32L073VBT7TR datasheet, STM32L073VBT7TR pinout, STM32L073VBT7TR application, or STM32L073VBT7TR equivalent, key selection criteria include verified 0.86 µA Stop mode + RTC + RAM retention, 12-bit ADC at 1.14 Msps (16 channels), and USB crystal-less timing tolerance for cost-sensitive portable designs.

Technical Context

The device implements a dual-bank Flash architecture enabling read-while-write operation and hardware ECC protection, paired with a multi-speed internal RC oscillator system (MSI: 65 kHz–4.2 MHz, HSI16: 16 MHz ±1%, HSI48 for USB clock recovery). Its low-power interconnect matrix routes peripherals-including 4x USART, 3x I2C, and 6x SPI-to the Cortex-M0+ core without bus contention.

Power management integrates five brownout reset (BOR) thresholds, programmable voltage detector (PVD), and dynamic voltage scaling to sustain operation from 1.65 V to 3.6 V across -40 °C to +125 °C, while the ultra-low-power timer (LPTIM) and RTC maintain timekeeping with 20-byte backup registers retained in Standby mode.

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 STM32L073VBT7TR, STM32L072VBT6 sacrifices USB for lower cost and smaller Flash, while STM32L433RCT6 trades ultra-low-power efficiency for computational headroom - making the VBT7TR optimal for USB-enabled, EEPROM-dependent, battery-critical designs.

Availability

STM32L073VBT7TR 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 across extended product lifecycles.

Supply support for STM32L073VBT7TR 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, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, robust peripheral integration, and secure firmware execution - optimized for IoT edge nodes and portable instrumentation.

FAQ

What is the maximum operating frequency and core type of STM32L073VBT7TR?

The STM32L073VBT7TR features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz performance. It supports dynamic voltage scaling to maintain this frequency across the full 1.65 V–3.6 V supply range, with factory-trimmed 16 MHz HSI and self-calibrating 48 MHz HSI48 oscillators ensuring timing accuracy for USB and real-time tasks.

Does STM32L073VBT7TR support crystal-less USB operation?

Yes - the device integrates a 48 MHz HSI48 oscillator with clock recovery system (CRS) that synchronizes to USB SOF packets, enabling full-speed USB 2.0 communication without an external crystal. This reduces bill-of-materials cost and PCB layout complexity in space-constrained portable designs.

How much EEPROM is integrated, and what is its endurance rating?

The STM32L073VBT7TR includes 6 KB of on-chip data EEPROM with built-in ECC, rated for 100,000 write/erase cycles and data retention exceeding 20 years at 85 °C. It operates down to 1.8 V and supports sector-level write protection to prevent accidental corruption of calibration or configuration data.

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

The MCU offers six low-power modes: Sleep, Low-power Run, Low-power Sleep, Stop, Standby, and Shutdown. The lowest verified current is 0.29 µA in Standby mode with three wakeup pins enabled, and 0.86 µA in Stop mode with RTC running and full 20 KB SRAM retained - both measured at 3.0 V and 25 °C per DS10685 Rev 7.