STMicroelectronics STM32L053R8H6D

Overview

STM32L053R8H6D 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 STM32L053R8H6D datasheet, STM32L053R8H6D pinout, STM32L053R8H6D application, or STM32L053R8H6D equivalent, key selection criteria include verified 0.8 µA Stop mode + RTC + 8 KB RAM retention, 32 MHz max CPU frequency with dynamic voltage scaling, 45 5V-tolerant I/Os, and hardware-accelerated capacitive touch sensing up to 24 channels.

Technical Context

The STM32L053R8H6D integrates a Cortex-M0+ core with MPU, supporting execution from Flash or RAM, and features dual clock domains: high-speed (HSI16/PLL/HSE up to 32 MHz) and low-power (LSI/LSE/MSI down to 37 kHz). Its interconnect matrix enables concurrent peripheral access without bus contention.

Ultra-low-power operation is enforced via five hierarchical modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby), each with distinct power gating, clock gating, and memory retention policies - including dedicated wake-up lines (16 in Stop), backup registers (20 bytes), and ECC-protected Flash/EEPROM for mission-critical firmware integrity.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 fast I/Os - 45 of which are 5V tolerant, enabling direct interface with legacy industrial logic and mixed-voltage sensor subsystems.

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 STM32L053R8H6D uniquely balances sub-1 µA Stop mode, integrated LCD, and capacitive touch - making it optimal for cost-sensitive, space-constrained HMI endpoints where display and touch are mandatory and crypto is not.

Availability

STM32L053R8H6D is available at Aetrix Electronics and suitable for smart utility meters, portable medical sensors, industrial wireless sensor nodes, and low-power HVAC controllers requiring stable component supply across long product lifecycles.

Supply support for STM32L053R8H6D 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 devices for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, wide temperature operation (-40°C to 125°C), and integrated peripherals - specifically optimized for metering, wearables, and intelligent edge sensors.

FAQ

What is the maximum operating frequency and corresponding power supply range for STM32L053R8H6D?

The STM32L053R8H6D operates up to 32 MHz when supplied between 2.4 V and 3.6 V. At lower voltages (1.65 V to 2.4 V), the maximum frequency is reduced to 16 MHz due to dynamic voltage scaling constraints - verified in Section 6.3.1 of DS10152 Rev 10.

Does STM32L053R8H6D support crystal-less USB operation, and what oscillator enables it?

Yes, it supports full-speed USB 2.0 without an external crystal via the internal 48 MHz HSI48 oscillator, which is factory-trimmed to ±0.25% accuracy and includes clock recovery system (CRS) for synchronization with host USB frames - detailed in Section 3.19.5 and Table 46 of the datasheet.

How many I/O pins are 5V tolerant, and which voltage domain do they belong to?

45 I/O pins are 5V tolerant, all located on GPIO ports A, B, C, and D - explicitly confirmed in Table 1 and Section 2.1 of DS10152 Rev 10. These pins operate from the VDD domain (1.65–3.6 V) but withstand 5.5 V transient inputs, enabling safe interfacing with 5V logic without external level shifters.

What is the guaranteed data retention period for the 2 KB EEPROM under typical operating conditions?

The 2 KB data EEPROM guarantees 10 years of data retention at 85°C and 100,000 write/erase cycles - specified in Table 52 of DS10152 Rev 10. Retention is extended to 15 years at 25°C, and ECC ensures bit-error correction during read operations.