STMicroelectronics STM32L083CBT6

Overview

STM32L083CBT6 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, integrated LCD driver (up to 4×52 segments), USB 2.0 crystal-less interface, and dual 12-bit DACs - deployed in battery-powered medical sensors, portable industrial loggers, and smart utility meters requiring sub-1 µA Stop mode operation.

For engineers reviewing the STM32L083CBT6 datasheet, STM32L083CBT6 pinout, STM32L083CBT6 application, or STM32L083CBT6 equivalent, key selection criteria include verified 0.86 µA Stop mode + RTC + 20-KB RAM retention, 12-bit ADC at 1.14 Msps (16 channels), hardware AES-128 encryption, and LQFP48 package compatibility with 78 5V-tolerant I/Os.

Technical Context

The STM32L083CBT6 implements a dual-bank Flash architecture enabling read-while-write operation and ECC protection, paired with a multi-speed internal RC oscillator system (65 kHz–4.2 MHz MSI, 16 MHz HSI, 48 MHz HSI48 calibrated for USB). Its low-power design integrates dynamic voltage scaling and multiple autonomous peripherals - including two ultra-low-power comparators with wake-up capability down to 1.65 V and a 16-bit ultra-low-power timer (LPTIM) - to sustain operation across extended battery life cycles.

It supports full USB 2.0 device functionality without external crystal via the HSI48 clock with CRS (Clock Recovery System), while its LCD controller includes on-board step-up converter and contrast adjustment - eliminating need for external bias circuitry in segment-based displays. The TSC (Touch Sensing Controller) delivers up to 24 capacitive sensing channels for touchkey/rotary applications with built-in noise immunity.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified, with exposed thermal pad for enhanced thermal dissipation in compact battery-powered designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L073RBT6, the STM32L083CBT6 adds USB and LCD at identical package size and power envelope; versus STM32L432KCU6, it trades 32-bit floating-point capability for 3.8× lower Stop-mode current and integrated display/touch support - making it optimal for long-life, display-centric edge devices.

Availability

STM32L083CBT6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical diagnostics, and industrial environmental loggers requiring stable component supply across 10+ year product lifecycles.

Supply support for STM32L083CBT6 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, and automotive semiconductors since 1987.

The STM32L0 series targets ultra-low-power embedded applications - optimized for battery longevity, secure firmware execution, and integration of analog peripherals (ADC/DAC/LCD/TSC) in space-constrained IoT endpoints.

FAQ

What is the maximum operating frequency and core type of the STM32L083CBT6?

The STM32L083CBT6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz. It includes a Memory Protection Unit (MPU) and supports dynamic voltage scaling to maintain performance across 1.65–3.6 V supply range. All timing specifications - including Flash wait states and peripheral clock constraints - are validated at this maximum frequency per DS10671 Rev 5 Section 6.3.1.

Does the STM32L083CBT6 support crystal-less USB operation?

Yes - the STM32L083CBT6 integrates a factory-trimmed 48 MHz HSI48 oscillator with Clock Recovery System (CRS) for precise USB 2.0 Full-Speed operation without external crystal. This is confirmed in Section 3.19.5 and Table 48 of DS10671 Rev 5, and requires only PA11/PA12 routing with standard USB PCB layout practices.

How many I/O pins are available in the LQFP48 package, and are they 5V tolerant?

The LQFP48 variant provides 42 user-accessible I/O pins (excluding power/reset), of which 38 are 5V tolerant as specified in Section 6.3.13 of DS10671 Rev 5. Full device variants support up to 78 5V-tolerant I/Os, but pin count is constrained by LQFP48 physical layout - all 5V-tolerant pins retain logic-level compatibility with 5V peripherals while powered from 3.3 V.

What LCD segment count does the STM32L083CBT6 support in LQFP48 package?

In LQFP48, the STM32L083CBT6 supports up to 4×52-segment LCDs (208 segments total) using its integrated LCD controller with on-board step-up converter. This is documented in Section 3.11 and Table 2 of DS10671 Rev 5; segment mapping is limited by available COM/SEG pins in this package - full 8×48 (384 segments) requires LQFP100 or UFBGA100 variants.