STMicroelectronics STM32L053R8T6D

Overview

STM32L053R8T6D from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 64 KB Flash, 8 KB SRAM, 2 KB EEPROM, integrated LCD driver, USB 2.0 (crystal-less), and 12-bit ADC/DAC - deployed in battery-powered smart meters, portable medical sensors, and industrial IoT edge nodes requiring sub-1 µA Stop mode operation.

For engineers reviewing the STM32L053R8T6D datasheet, STM32L053R8T6D pinout, STM32L053R8T6D application, or STM32L053R8T6D equivalent, key selection criteria include wake-up time from Stop mode (5 µs), 0.8 µA Stop mode + RTC + 8-KB RAM retention, 45 I/Os (5V-tolerant), and crystal-less USB support for cost-sensitive embedded designs.

Technical Context

The STM32L053R8T6D integrates a Cortex-M0+ core with MPU, operating from 32 kHz to 32 MHz, delivering 0.95 DMIPS/MHz. Its ultra-low-power architecture includes five low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby), with hardware-accelerated power gating and dynamic voltage scaling enabling precise energy budgeting.

Peripherals are interconnected via a dedicated AHB/APB matrix supporting concurrent DMA transfers across ADC, DAC, timers, USB, and communication interfaces. The on-chip LCD controller supports up to 8×28 segments with contrast adjustment and blinking, while the crystal-less USB PHY includes battery charging detection and LPM support - eliminating external timing components.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 fast I/Os (45 of which are 5V tolerant), including dedicated LCD segment/common pins, USB D+/D−, VBAT, VREF+, and multiple wake-up capable GPIOs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L073RZT6 and STM32L432KCU6, the STM32L053R8T6D uniquely balances sub-µA Stop mode, integrated LCD, crystal-less USB, and on-chip EEPROM - making it optimal for cost- and power-constrained display-enabled edge nodes where security and compute throughput are secondary to longevity and component count reduction.

Availability

STM32L053R8T6D is available at Aetrix Electronics and suitable for smart utility meters, portable medical sensors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L053R8T6D 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 products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, integrated peripherals, and robust firmware security - with the STM32L053R8T6D optimized for display-centric, USB-configurable endpoints.

FAQ

What is the maximum operating frequency and core type of the STM32L053R8T6D?

The STM32L053R8T6D features an Arm Cortex-M0+ core with a maximum CPU frequency of 32 MHz and delivers 0.95 DMIPS/MHz. It operates across a wide voltage range (1.65–3.6 V) and temperature range (–40 to +125 °C), validated per DS10152 Rev 10 specifications. The core includes a Memory Protection Unit (MPU) for enhanced firmware reliability in safety-critical applications.

Does the STM32L053R8T6D support crystal-less USB operation?

Yes - the STM32L053R8T6D integrates a crystal-less USB 2.0 full-speed PHY with a Clock Recovery System (CRS) that synchronizes the internal 48 MHz HSI48 oscillator to the USB Start-of-Frame (SOF) token. This eliminates the need for an external 48 MHz crystal and associated load capacitors, reducing bill-of-materials cost and PCB footprint in portable designs.

How much EEPROM is integrated, and what is its endurance rating?

The STM32L053R8T6D includes 2 KB of on-chip data EEPROM with built-in Error Correction Code (ECC). According to ST's DS10152 Rev 10, it guarantees ≥300,000 write/erase cycles and data retention of ≥40 years at 55 °C - enabling reliable storage of calibration coefficients, device identifiers, and field-updatable parameters without external memory.

What LCD capabilities does the STM32L053R8T6D provide?

The STM32L053R8T6D integrates a static/dot-matrix LCD controller supporting up to 8 commons and 32 segments (8×28 configuration). It includes an on-board step-up converter for LCD bias voltage generation, programmable contrast adjustment, blinking mode, and software-controlled voltage boosting - allowing direct connection to common segmented LCD glass without external power supplies or drivers.