STMicroelectronics STM32L072KZU6TR

Overview

STM32L072KZU6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM, featuring USB 2.0 (crystal-less), dual 12-bit DACs, 12-bit ADC (1.14 Msps), and operation down to 1.65 V. It targets battery-powered IoT sensors, portable medical devices, and smart metering systems requiring long runtime and mixed-signal integration.

For engineers reviewing the STM32L072KZU6TR datasheet, STM32L072KZU6TR pinout, STM32L072KZU6TR application, or STM32L072KZU6TR equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), USB crystal-less timing tolerance, DAC output buffer voltage range (≥1.8 V), and 78 I/Os with 5V tolerance.

Technical Context

The device integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling across three power ranges (1.65–3.6 V) and enabling sub-1 µA low-power modes via configurable wakeup sources (3 pins in Standby, 16 lines in Stop). Its clock system combines factory-trimmed HSI16 (±1%), self-calibrating 48 MHz HSI48 for USB, and LSE/RTC calibration for timekeeping accuracy.

Analog subsystem includes two independent 12-bit DACs with rail-to-rail buffered outputs, a 12-bit ADC with up to 16 channels and 1.14 Msps sampling, and two ultra-low-power comparators operating down to 1.65 V with window mode and wakeup capability - all co-located on a single die with shared reference and temperature sensor.

Key Specifications

Pinout & Package

STM32L072KZU6TR uses a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per ST's DS10689 Rev 5, Table 16 (STM32L072xxx pin definition).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072KZU6TR, STM32L073RZT6 trades 5V-tolerant I/Os for more pins and larger package, while STM32L432KCU6 upgrades CPU performance at the cost of standby current and USB integration - making the KZU6TR optimal for compact, battery-constrained designs needing mixed-signal precision and minimal external components.

Availability

STM32L072KZU6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable gas detectors, and industrial wireless sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32L072KZU6TR 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 products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications, emphasizing energy efficiency, integrated analog peripherals, and secure firmware execution - specifically engineered for battery-powered edge devices with multi-year operational requirements.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L072KZU6TR operates up to 32 MHz. At 32 MHz with code executing from Flash, typical current consumption is 93 µA/MHz (≈2.98 mA total), measured at 3.0 V and 25 °C per DS10689 Rev 5, Table 30. Dynamic voltage scaling allows lower frequencies to reduce power further in low-throughput tasks.

Does this MCU support USB device functionality without an external crystal?

Yes. The STM32L072KZU6TR integrates a self-calibrating 48 MHz HSI48 RC oscillator qualified for USB Full-Speed (12 Mbps) operation. It meets USB timing jitter requirements without external crystal or capacitor, confirmed in Section 3.17.5 and Table 48 of DS10689 Rev 5.

How many I/O pins are 5V tolerant, and which ones are they?

78 I/O pins are 5V tolerant, covering all GPIOs except those dedicated to USB (PA11/PA12), SWD (PA13/PA14), and BOOT0 (PB2). This is explicitly stated in Section 2.1 and Table 2 of DS10689 Rev 5, and verified in the pin definition table (Table 16) where "FT" marking denotes 5V tolerance.

What is the endurance and data retention specification for the embedded EEPROM?

The 6 KB data EEPROM supports 100,000 write/erase cycles and guarantees data retention for 20 years at 55 °C or 40 years at 25 °C, as specified in Table 54 of DS10689 Rev 5. ECC protection ensures bit-error correction during read/write operations to maintain data integrity.