STMicroelectronics STM32L083RZT6

Overview

STM32L083RZT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, 6 KB EEPROM, integrated LCD driver, USB 2.0 (crystal-less), and hardware AES-128 encryption-designed for battery-powered IoT sensors, portable medical devices, and smart metering endpoints operating from 1.65–3.6 V across –40 to +125 °C.

For engineers reviewing the STM32L083RZT6 datasheet, STM32L083RZT6 pinout, STM32L083RZT6 application, or STM32L083RZT6 equivalent, key selection considerations include its 0.29 µA standby current, 12-bit ADC at 1.14 Msps (16 channels), dual 12-bit DACs with buffers, ultra-low-power comparators, and 24-channel capacitive touch sensing-critical for energy-constrained embedded designs requiring mixed-signal integration and secure firmware execution.

Technical Context

The STM32L083RZT6 implements a Cortex-M0+ core with Memory Protection Unit (MPU), supporting dynamic voltage scaling and clock gating across seven low-power modes-including Stop mode with RTC + 20 KB RAM retention at 0.86 µA and Standby mode at 0.29 µA with three wakeup pins. Its clock system integrates factory-trimmed 16 MHz HSI, 48 MHz HSI48 (self-calibrated for USB), 32 kHz LSE for RTC, and PLL for CPU frequency up to 32 MHz.

Analog subsystem includes a 12-bit ADC (1.14 Msps, down to 1.65 V supply), two buffered 12-bit DACs (operable down to 1.8 V), two ultra-low-power comparators with window mode and wake-up capability, and a dedicated Touch Sensing Controller (TSC) supporting up to 24 capacitive sensing channels for touchkey/rotary applications.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 84 fast I/Os (78 5V-tolerant), including dedicated LCD segment/common lines, USB D+/D−, VBAT, VREF+, VREF−, and multiple wakeup-capable pins (PA0–PA3, PC13, PC14, PC15).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L073RZT6, the STM32L083RZT6 adds LCD control and 6 KB EEPROM at identical power and footprint-making it optimal for display-centric designs. Versus STM32L433RCT6, it trades raw compute for deeper low-power states and analog integration, targeting battery life over processing throughput.

Availability

STM32L083RZT6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and low-power human-machine interfaces requiring stable component supply across extended product lifecycles.

Supply support for STM32L083RZT6 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-emphasizing sub-µA sleep modes, integrated peripherals (LCD, USB, AES), and long-life battery operation in space- and energy-constrained devices.

FAQ

What is the maximum operating frequency and associated power consumption of the STM32L083RZT6?

The STM32L083RZT6 operates up to 32 MHz using its PLL or HSI16 oscillator. At 32 MHz in Run mode with code executing from Flash, typical current consumption is 2.98 mA (93 µA/MHz). This value assumes VDD = 3.3 V, ambient temperature = 25 °C, and all peripherals disabled except the CPU and Flash interface.

Does the STM32L083RZT6 support crystal-less USB operation, and what accuracy is guaranteed?

Yes-the device integrates a self-calibrating 48 MHz HSI48 RC oscillator synchronized to the USB Start-of-Frame (SOF) token, achieving ±0.25% frequency accuracy over temperature and voltage. This eliminates the need for an external 48 MHz crystal while maintaining full USB 2.0 full-speed compliance.

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

78 of the 84 general-purpose I/Os are 5V tolerant across all LQFP and UFBGA packages, including the LQFP100 (RZT6). This tolerance applies when VDD is ≥2.0 V and allows direct interfacing with 5V logic without level shifters-verified per datasheet Table 60 (I/O static characteristics).

What is the endurance and data retention specification for the embedded EEPROM?

The 6 KB data EEPROM supports 400,000 write/erase cycles and guarantees 20 years of data retention at 55 °C (or 40 years at 25 °C), with built-in ECC for single-bit error correction and detection-enabling reliable non-volatile storage of calibration data, device IDs, or usage logs in field-deployed equipment.