STMicroelectronics STM32L152UCY6TR

Overview

STM32L152UCY6TR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 256 KB Flash, 32 KB SRAM, 8 KB EEPROM with ECC, integrated LCD driver (8×40 segments), and USB 2.0 interface. It operates from 1.65 V to 3.6 V across –40 °C to 105 °C and delivers 1.25 DMIPS/MHz performance. It targets battery-powered portable instrumentation, smart meters, and wearable health monitors requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L152UCY6TR datasheet, STM32L152UCY6TR pinout, STM32L152UCY6TR application, or STM32L152UCY6TR equivalent, key selection criteria include standby current (0.29 µA), 12-bit ADC (1 Msps, 25 channels), dual 12-bit DACs, ultra-low-power comparators with wake-up capability, and WLCSP63 package compatibility with capacitive touch sensing.

Technical Context

The STM32L152UCY6TR implements dynamic voltage scaling and multiple low-power modes (Stop, Standby, Low-power Run) managed by an integrated ultra-safe BOR with five threshold levels and programmable voltage detector (PVD). Its clock system combines a 32 kHz RTC oscillator with calibration, 16 MHz HSI RC (±1%), and a PLL supporting USB 48 MHz generation.

Analog subsystem includes two operational amplifiers, two ultra-low-power comparators (with window mode and wake-up), a 12-bit ADC with internal reference and temperature sensor, and two buffered 12-bit DACs - all functional down to 1.8 V supply. The LCD controller supports contrast adjustment, blinking, and integrated step-up converter.

Key Specifications

Pinout & Package

STM32L152UCY6TR uses a 63-ball Wafer-Level Chip-Scale Package (WLCSP63) with 0.4 mm pitch and 3.5 mm × 3.5 mm footprint. This package supports automated assembly and offers excellent thermal performance for low-power operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152UCY6TR, STM32L432KCU6 trades EEPROM and LCD for FPU and deeper sleep, while EFM32PG12B500F1024GL125 sacrifices USB and display support for larger memory and RF integration - making STM32L152UCY6TR uniquely balanced for compact, battery-powered display-and-sensor edge nodes.

Availability

STM32L152UCY6TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and capacitive touch remotes requiring stable component supply and long-term manufacturability.

Supply support for STM32L152UCY6TR 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 automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust security features - optimized for metering, healthcare, and IoT endpoints.

FAQ

What is the maximum operating frequency and core architecture of the STM32L152UCY6TR?

The STM32L152UCY6TR features an ARM Cortex-M3 32-bit core rated for up to 32 MHz operation. It achieves 1.25 DMIPS/MHz (Dhrystone 2.1) and includes a Memory Protection Unit (MPU) for secure task isolation. The core supports Thumb-2 instruction set and operates across the full 1.65 V to 3.6 V supply range.

Does the STM32L152UCY6TR support USB functionality without external components?

Yes - it integrates a full-speed USB 2.0 device transceiver with an internal 48 MHz PLL, eliminating the need for an external PHY or crystal. USB_DP and USB_DM pins connect directly to a standard USB connector, and the pre-programmed bootloader supports firmware updates via USB CDC or DFU class without additional hardware.

How many capacitive sensing channels does the STM32L152UCY6TR support, and what is required to implement them?

The device supports up to 23 capacitive sensing channels using its built-in Capacitive Sensing Controller (TS). Implementation requires only external electrodes and optional series resistors; no external ICs or dedicated touch ASICs are needed. Firmware libraries (STM32CubeL1) provide calibrated scanning, debouncing, and proximity detection out of the box.

What are the key differences between the STM32L152UCY6TR and the STM32L151UCY6TR?

The STM32L152UCY6TR includes 2× operational amplifiers, 2× ultra-low-power comparators, and a temperature sensor - features absent in the STM32L151UCY6TR. Both share identical Flash (256 KB), SRAM (32 KB), EEPROM (8 KB), package (WLCSP63), and peripheral count except for these analog enhancements, making the L152 variant preferred for sensor signal conditioning.