STMicroelectronics STM32L082CZY3TR

Overview

STM32L082CZY3TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, USB 2.0 crystal-less interface, and dual 12-bit DACs - deployed in battery-powered IoT sensor nodes requiring long-term operation at -40 to 125 °C.

For engineers reviewing the STM32L082CZY3TR datasheet, STM32L082CZY3TR pinout, STM32L082CZY3TR application, or STM32L082CZY3TR equivalent, key selection criteria include standby current (0.29 µA), 12-bit ADC performance (1.14 Msps), USB crystal-less timing tolerance, DAC output buffer voltage range (down to 1.8 V), and WLCSP36 package thermal profile for space-constrained designs.

Technical Context

This MCU implements a dual-bank Flash architecture enabling read-while-write operation, paired with an integrated hardware AES-128 engine and true RNG for secure firmware updates. Its clock system integrates factory-trimmed 16 MHz HSI RC (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE with RTC calibration - supporting precise timekeeping without external crystals.

The low-power design includes five operational modes (Run, Sleep, Low-power Run, Stop, Standby), with dedicated wakeup sources: 3 pins in Standby, 16 lines in Stop, and RTC + 20 KB RAM retention at 0.86 µA. Analog subsystem comprises two ultra-low-power comparators (1.65 V min supply), 12-bit ADC with 13 channels, and capacitive sensing up to 19 channels.

Key Specifications

Pinout & Package

STM32L082CZY3TR uses a 36-ball WLCSP (2.61 × 2.88 mm, 0.4 mm pitch) with 32 I/Os - 34 of which are 5V-tolerant. The package supports solder reflow per JEDEC J-STD-020 and offers thermal resistance θ_JA = 170 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M0+ microcontroller applications.

Compared with STM32L072CZT6 and STM32L432KCU6, the STM32L082CZY3TR uniquely balances sub-µA standby, integrated USB, dual DACs, and EEPROM - making it optimal for compact, battery-powered devices requiring secure, analog-rich, and USB-configurable operation.

Availability

STM32L082CZY3TR is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial predictive maintenance sensors, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L082CZY3TR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications - optimized for battery-operated devices demanding multi-year runtime, secure firmware, and rich analog integration without sacrificing code density or debug accessibility.

FAQ

What is the maximum operating frequency and core type of the STM32L082CZY3TR?

The STM32L082CZY3TR features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS per MHz. It supports dynamic voltage scaling to maintain performance across 1.65–3.6 V supply ranges and includes a Memory Protection Unit (MPU) for task isolation in RTOS environments.

Does the STM32L082CZY3TR support crystal-less USB operation?

Yes - it integrates a self-calibrating 48 MHz HSI48 RC oscillator specifically for USB full-speed (12 Mbps) operation, eliminating the need for an external 12 MHz crystal. This feature is validated per USB-IF compliance tests and supports battery charging detection per USB BC 1.2.

How much EEPROM is available, and what endurance does it offer?

The device includes 6 KB of data EEPROM with built-in ECC, rated for 100,000 write/erase cycles and data retention exceeding 20 years at 85 °C. It supports byte, half-word, and word programming, with sector protection to prevent accidental overwrites of critical calibration or security parameters.

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

It offers five low-power modes: Standby (0.29 µA, 3 wakeup pins), Stop (0.43 µA, 16 wakeup lines), Stop + RTC + 20 KB RAM retention (0.86 µA), Low-power Run (160 µA at 32 kHz), and Sleep (62 µA at 32 MHz). All modes retain register content and support fast wakeup (<5 µs from Flash).