STMicroelectronics STM32L072KZU6

Overview

STM32L072KZU6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFBGA64 (5 × 5 mm) package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, USB 2.0 crystal-less interface, dual 12-bit DACs, and 12-bit ADC up to 1.14 Msps - deployed in battery-powered IoT sensor nodes requiring long-term operation on coin cells.

For engineers reviewing the STM32L072KZU6 datasheet, STM32L072KZU6 pinout, STM32L072KZU6 application, or STM32L072KZU6 equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), USB self-calibrating 48 MHz RC oscillator, 78 5V-tolerant I/Os, and integrated true RNG with firewall protection.

Technical Context

The STM32L072KZU6 implements a single-core Arm Cortex-M0+ with Memory Protection Unit (MPU), operating from 32 kHz to 32 MHz, delivering 0.95 DMIPS/MHz. Its power architecture supports six low-power modes including Standby with 3 wakeup pins and Stop mode with 16 wakeup lines, enabled by ultra-low-power BOR, programmable voltage detector (PVD), and dynamic voltage scaling.

Analog subsystem integration 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 24-channel capacitive sensing controller supporting touchkey/rotary applications - all co-located with 11 timers (including LPTIM and RTC) and 7-channel DMA for autonomous peripheral operation.

Key Specifications

Pinout & Package

STM32L072KZU6 is housed in a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package measuring 5 mm × 5 mm with 0.5 mm ball pitch, optimized for high-density PCB layouts and thermal performance in sealed enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072KZU6, STM32L073RZT6 trades USB flexibility for CAN FD and larger packaging, while STM32L432KCU6 delivers higher compute throughput at the expense of EEPROM and deeper sleep efficiency - making STM32L072KZU6 optimal for cost-sensitive, battery-limited applications demanding analog integration and secure persistent storage.

Availability

STM32L072KZU6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial asset tracking, and smart building HVAC control requiring stable component supply across multi-year production cycles.

Supply support for STM32L072KZU6 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, MEMS sensors, and automotive semiconductors since 1987.

The STM32L0 series targets ultra-low-power embedded applications - specifically engineered for battery-operated IoT endpoints, wearables, and energy-harvesting systems where sub-µA standby and integrated analog peripherals reduce system-level BOM count and power conversion losses.

FAQ

What is the maximum operating frequency and core type of the STM32L072KZU6?

The STM32L072KZU6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz. It supports dynamic voltage scaling to maintain performance across 1.65–3.6 V supply range, with factory-trimmed 16 MHz HSI and self-calibrating 48 MHz HSI48 RC oscillators enabling precise timing without external crystals in most use cases.

Does the STM32L072KZU6 support USB device functionality without an external crystal?

Yes - the STM32L072KZU6 integrates a crystal-less USB 2.0 interface with an internal 48 MHz RC oscillator that self-calibrates against the USB SOF packet, achieving ±0.25% accuracy over temperature and voltage. This eliminates the need for an external 48 MHz crystal or oscillator, reducing bill-of-materials cost and PCB footprint in USB-connected sensor nodes and diagnostic tools.

How much EEPROM is available, and what protection mechanisms does it include?

The STM32L072KZU6 provides 6 KB of data EEPROM with built-in ECC (Error Correction Code) for bit-error detection and correction, plus hardware sector write-protection to prevent accidental overwrite. Each EEPROM sector can be independently erased and programmed, and the memory retains data for 20 years at 55 °C with 100,000 write/erase cycles - validated per ST's DS10689 Rev 5 specification.

What are the key low-power modes and their typical current consumption values?

The STM32L072KZU6 offers six low-power modes: Standby (0.29 µA with 3 wakeup pins), Stop (0.43 µA with 16 wakeup lines), and Stop + RTC + 20 KB RAM retention (0.86 µA). Run mode draws 93 µA/MHz, and wakeup from Flash takes 5 µs. These values are measured per DS10689 Rev 5 at 3.0 V and 25 °C, with all peripherals disabled except those explicitly retained.