STMicroelectronics STM32L073CZY6TR

Overview

STM32L073CZY6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in WLCSP49 package, featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, integrated LCD driver (up to 4×52 segments), USB 2.0 crystal-less interface, and dual 12-bit DACs. 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 signal conditioning.

For engineers reviewing the STM32L073CZY6TR datasheet, STM32L073CZY6TR pinout, STM32L073CZY6TR application, or STM32L073CZY6TR equivalent, key selection criteria include its 0.29 µA Standby current, 41 µA 12-bit ADC conversion at 10 ksps, 5 µs wakeup from Flash, and support for capacitive touch sensing across up to 24 channels - all critical for energy-constrained embedded designs.

Technical Context

This MCU implements a dual-bank Flash architecture with read-while-write capability and hardware ECC, enabling safe firmware updates without halting execution. Its clock system integrates factory-trimmed 16 MHz HSI, self-calibrating 48 MHz HSI48 for USB, and low-power 37 kHz LSI for RTC - supporting dynamic voltage scaling and multiple low-power modes including Stop mode with RTC + 20 KB RAM retention at 0.86 µA.

The analog subsystem includes two independent 12-bit DACs with output buffers (operable down to 1.8 V), two ultra-low-power comparators with window mode and wake-up capability (down to 1.65 V), and a 12-bit ADC with 1.14 Msps sampling rate across up to 16 channels - all sharing common voltage reference and calibration registers for coordinated sensor signal chain design.

Key Specifications

Pinout & Package

STM32L073CZY6TR uses a 49-ball WLCSP (Wafer-Level Chip Scale Package) measuring 3.294 × 3.258 mm, optimized for space-constrained portable electronics. The package supports 42 user I/Os (37 of which are 5V-tolerant), with dedicated pins for LCD segment/common drive, USB D+/D−, and capacitive touch sensing channels.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L072CZY6TR, this part adds USB, LCD, and dual DACs at identical footprint and power envelope; versus STM32L432KCU6, it trades raw compute for superior analog integration and sub-µA low-power modes - making it optimal for display-equipped, battery-limited edge nodes.

Availability

STM32L073CZY6TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and low-power HVAC thermostats requiring stable component supply across extended product lifecycles.

Supply support for STM32L073CZY6TR 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 automotive-grade components since 1987.

The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, integrated analog peripherals, and robust security - with STM32L073CZY6TR representing the highest feature density in WLCSP form factor.

FAQ

What is the maximum operating frequency and core type of STM32L073CZY6TR?

The STM32L073CZY6TR features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS per MHz. Its maximum CPU frequency is constrained by supply voltage and temperature: 32 MHz at 3.0–3.6 V, 24 MHz at 2.4–2.99 V, and 16 MHz at 1.65–2.39 V - verified in DS10685 Rev 7 Section 6.3.1.

Does STM32L073CZY6TR support crystal-less USB operation?

Yes - it integrates a self-calibrating 48 MHz HSI48 RC oscillator specifically for USB 2.0 full-speed operation without external crystal. Calibration achieves ±0.25% accuracy over voltage and temperature, meeting USB specification requirements as confirmed in Section 3.5 and Table 48 of DS10685 Rev 7.

How many capacitive sensing channels does STM32L073CZY6TR provide, and what GPIOs support them?

It provides 24 capacitive sensing channels via its Touch Sensing Controller (TSC). Supported GPIOs include PA0–PA7, PB0–PB15, and PC0–PC15 - totaling 32 pins, of which any 24 may be configured as TSC inputs. Pin mapping and channel assignment are defined in Table 9 and Section 3.16 of DS10685 Rev 7.

What is the minimum supply voltage for the 12-bit DAC outputs to remain functional?

The dual 12-bit DACs operate down to 1.8 V supply voltage while maintaining full 12-bit resolution and monotonicity, as specified in Section 6.3.16 (Table 67) of DS10685 Rev 7. Below 1.8 V, DAC functionality is not guaranteed - this threshold is enforced by internal voltage monitoring circuitry.