STMicroelectronics STM32L082KBU6

Overview

STM32L082KBU6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, USB 2.0 crystal-less interface, 12-bit ADC (1.14 Msps), and dual 12-bit DACs - deployed in battery-powered IoT sensor nodes requiring sub-100 µA/MHz active current and <5 µs wake-up from Flash.

For engineers reviewing the STM32L082KBU6 datasheet, STM32L082KBU6 pinout, STM32L082KBU6 application, or STM32L082KBU6 equivalent, key selection criteria include verified 0.86 µA Stop mode + RTC + 20-KB RAM retention, hardware AES-128 encryption, and 34 I/Os with 5V tolerance - critical for secure, long-life portable medical and smart metering designs.

Technical Context

The STM32L082KBU6 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 self-calibrated for USB). Its power management includes five BOR thresholds, programmable voltage detector (PVD), and dynamic voltage scaling across three operating ranges (1.65–3.6 V).

Peripherals are interconnected via a dedicated AHB/APB matrix supporting concurrent DMA transfers to ADC, DAC, USART, SPI, I2C, timers, and AES engine. The device integrates a touch sensing controller (TSC) with up to 19 capacitive channels and two ultra-low-power comparators with window mode and wake-up capability down to 1.65 V.

Key Specifications

Pinout & Package

STM32L082KBU6 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package measuring 5 × 5 mm with 0.5 mm pitch, optimized for compact PCB layouts in space-constrained wearables and sensor modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072KBU6, the STM32L082KBU6 adds 64 KB Flash and USB for firmware agility; versus STM32L432KCU6, it trades M4F performance for 30% lower Stop-mode current and integrated EEPROM - making it optimal for battery-limited, security-aware, USB-configurable endpoints.

Availability

STM32L082KBU6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and secure access control terminals requiring stable component supply across multi-year production cycles.

Supply support for STM32L082KBU6 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 - specifically engineered for battery-operated IoT endpoints where energy efficiency, security, and integration density outweigh raw computational throughput.

FAQ

What is the maximum operating frequency and corresponding power supply range for STM32L082KBU6?

The STM32L082KBU6 operates up to 32 MHz when supplied between 2.4 V and 3.6 V (Voltage Range 1). At lower voltages (1.65–2.4 V, Voltage Range 2), maximum frequency is reduced to 16 MHz to maintain timing margins and stability - verified per DS10688 Rev 7 Section 6.3.1.

Does STM32L082KBU6 support hardware-accelerated SHA or RSA cryptography?

No. The STM32L082KBU6 includes only a hardware AES-128 encryption engine and true random number generator (RNG). It does not implement SHA-1/SHA-2 or RSA accelerators - those features appear in higher-tier STM32L4/L5 series devices.

Can the internal 32 kHz LSE oscillator be used for RTC calibration without an external crystal?

No. The LSE oscillator requires an external 32.768 kHz crystal connected to PC14/PC15 to achieve ±20 ppm accuracy needed for RTC timekeeping. The internal 37 kHz LSI oscillator may drive RTC but drifts significantly (±1000 ppm) and cannot be calibrated - confirmed in Section 3.5 and Table 43 of DS10688 Rev 7.

How many I/O pins support capacitive touch sensing on STM32L082KBU6?

The STM32L082KBU6 supports up to 19 capacitive sensing channels using dedicated TSC peripheral pins - specifically PA0–PA7, PB0–PB1, PC0–PC7, and PH0–PH1, as defined in Table 8 and Section 3.15 of DS10688 Rev 7.