STMicroelectronics STM32L083CZT6TR

Overview

STM32L083CZT6TR 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 integrated USB 2.0 (crystal-less), LCD driver (up to 4×52 segments), dual 12-bit DACs, and 12-bit ADC (1.14 Msps). It operates from 1.65–3.6 V across –40 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 STM32L083CZT6TR datasheet, STM32L083CZT6TR pinout, STM32L083CZT6TR application, or STM32L083CZT6TR equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), USB crystal-less operation, LCD segment drive capability, and AES-128 hardware encryption for secure firmware updates.

Technical Context

The device integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby) with sub-µA retention states. Its clock system combines HSI16 (±1%), HSI48 (self-calibrated for USB), LSE (32 kHz RTC), and MSI (65 kHz–4.2 MHz), enabling precise timing control across power domains.

Analog subsystem includes two independent 12-bit DACs with output buffers (operable down to 1.8 V), a 12-bit ADC with 16 channels and 1.14 Msps sampling, and two ultra-low-power comparators with window mode and wake-up capability (down to 1.65 V), all co-located with capacitive sensing (24 channels) and temperature sensor.

Key Specifications

Pinout & Package

STM32L083CZT6TR is housed in a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package compliant with ECOPACK2 environmental standards. The package supports thermal dissipation up to 43 °C/W (J_JA) and features 42 general-purpose I/Os (37 of which are 5V-tolerant), including dedicated LCD segment/common lines and USB D+/D− pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L073RZT6, STM32L083CZT6TR adds USB and LCD at modest cost premium, enabling direct PC connectivity and local UI - critical for field-serviceable instruments. Versus STM32L433RCT6P, it trades raw compute for 3× lower Stop-mode current and built-in display control, making it superior for long-life, human-facing edge devices.

Availability

STM32L083CZT6TR is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial wireless sensor nodes, and low-power human-machine interfaces requiring stable component supply across extended product lifecycles.

Supply support for STM32L083CZT6TR 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 demanding extended battery life, integrated analog peripherals, and secure firmware execution - optimized for wearables, smart meters, and portable diagnostics.

FAQ

What is the maximum operating frequency and core type of STM32L083CZT6TR?

The STM32L083CZT6TR features an Arm Cortex-M0+ core with a maximum CPU frequency of 32 MHz. It includes a Memory Protection Unit (MPU) and achieves 0.95 DMIPS/MHz. The core supports Thumb-2 instruction set and operates across the full 1.65–3.6 V supply range, with dynamic voltage scaling enabling optimal power/performance trade-offs in different operating modes.

Does STM32L083CZT6TR support crystal-less USB operation, and what are the implications?

Yes, STM32L083CZT6TR integrates a factory-trimmed 48 MHz HSI48 oscillator with automatic self-calibration against the USB SOF signal, enabling full USB 2.0 Full-Speed (12 Mbps) operation without an external crystal. This eliminates two passive components (crystal + load capacitors), reduces PCB area, lowers BOM cost, and improves reliability in shock/vibration environments - confirmed in Section 3.19.5 and Table 48 of DS10671 Rev 5.

How many I/O pins are 5V-tolerant, and which packages support this feature?

STM32L083CZT6TR provides 78 I/O pins with 5V tolerance, all accessible in its UFQFPN48 package (pinout defined in Table 16, DS10671 Rev 5, page 42). This includes PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, and PH0–PH1 - enabling direct interfacing with legacy 5V logic, sensors, and displays without level shifters, critical for industrial retrofit applications.

What LCD configuration options does STM32L083CZT6TR support, and how is contrast managed?

The device supports up to 4×52 or 8×48 segment LCDs using dedicated COM/SEG pins (PC12–PC15, PD0–PD15, PH0–PH1). Contrast is adjusted via software-controlled internal voltage divider (VLCD generation), and blinking mode is supported through dedicated registers. An on-chip step-up converter generates VLCD from VDD, eliminating need for external bias supply - detailed in Section 3.11 and electrical specs Table 21 (page 122).