STMicroelectronics STM32L072CZY6DTR

Overview

STM32L072CZY6DTR 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, USB 2.0 crystal-less interface, and dual 12-bit DACs. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 0.86 µA Stop mode + RTC with 20-KB RAM retention-ideal for battery-powered IoT sensor nodes and portable medical devices.

For engineers reviewing the STM32L072CZY6DTR datasheet, STM32L072CZY6DTR pinout, STM32L072CZY6DTR application, or STM32L072CZY6DTR equivalent, key selection criteria include ultra-low-power runtime (93 µA/MHz), integrated USB PHY without external crystal, dual DAC output buffering down to 1.8 V, and 24-channel capacitive touch sensing support.

Technical Context

The device integrates a Cortex-M0+ core with MPU, running at up to 32 MHz using multiple internal RC oscillators-including factory-trimmed 16 MHz HSI (+/−1%) and self-calibrating 48 MHz HSI48 for USB timing. Its interconnect matrix enables concurrent peripheral access without bus contention.

Low-power operation is enforced via five power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby), each with configurable voltage scaling and wakeup sources-including 3 dedicated standby pins and 16 Stop-mode wakeup lines. The embedded BOR offers five programmable thresholds for robust brownout management.

Key Specifications

Pinout & Package

STM32L072CZY6DTR uses a 49-ball WLCSP (Wafer-Level Chip Scale Package) with 0.4 mm pitch and 3.294 × 3.258 mm footprint. Ball layout supports high-density PCB integration and thermal efficiency in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072CZY6DTR, STM32L073RZT6 trades WLCSP miniaturization and USB crystal-less operation for CAN FD and larger package, while STM32L432KCU6 upgrades core performance at the cost of ultra-low-power efficiency and USB integration simplicity.

Availability

STM32L072CZY6DTR is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and energy-harvesting IoT endpoints requiring stable component supply across extended product lifecycles.

Supply support for STM32L072CZY6DTR 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding long battery life, robust security, and rich analog integration-optimized for metering, wearables, and maintenance-free sensor systems.

FAQ

What is the maximum operating frequency and core type of the STM32L072CZY6DTR?

The STM32L072CZY6DTR features an Arm Cortex-M0+ core rated for up to 32 MHz operation. Its 0.95 DMIPS/MHz performance metric reflects deterministic instruction execution suitable for real-time sensor fusion and control loops. The core includes a Memory Protection Unit (MPU) for secure task isolation in multitasking environments.

Does the STM32L072CZY6DTR support USB without an external crystal?

Yes-the device integrates a crystal-less USB 2.0 full-speed PHY with self-calibrating 48 MHz HSI48 oscillator. This eliminates the need for an external 48 MHz crystal and associated load capacitors, reducing bill-of-materials cost and PCB area while maintaining USB compliance under varying temperature and voltage conditions.

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

STM32L072CZY6DTR provides 72 5V-tolerant I/Os out of its 78 total GPIOs. It is packaged in a 49-ball WLCSP (3.294 × 3.258 mm, 0.4 mm pitch), optimized for ultra-compact designs such as wearable health monitors and miniature industrial transmitters.

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

The device supports five low-power modes: Sleep, Low-power Run/Sleep, Stop, and Standby. In Standby mode with three wakeup pins enabled, it achieves 0.29 µA typical current draw. With RTC and 20 KB SRAM retention active in Stop mode, consumption is 0.86 µA-verified across –40 to +125 °C per DS10689 Rev 5.