STMicroelectronics STM32L152ZET6

Overview

STM32L152ZET6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 80 KB SRAM, 16 KB EEPROM with ECC, integrated LCD controller (8×40 segments), USB 2.0 interface, and dual 12-bit ADCs (1 Msps, up to 40 channels). It operates from 1.65 V to 3.6 V across –40 °C to +105 °C and delivers 195 µA/MHz in Run mode - deployed in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L152ZET6 datasheet, STM32L152ZET6 pinout, STM32L152ZET6 application, or STM32L152ZET6 equivalent, key selection criteria include standby current (290 nA), RTC-enabled Stop mode (1.11 µA), 102 I/Os (5V tolerant), LCD driver capability, and USB/ADC/DAC co-integration for mixed-signal edge-node designs.

Technical Context

The STM32L152ZET6 implements a 32-bit Arm Cortex-M3 core with MPU, supporting dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby) with sub-µA retention. Its clock system integrates five oscillators: HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a 48 MHz PLL for USB timing.

Analog subsystem includes two rail-to-rail op-amps, two ultra-low-power comparators with window mode and wake-up capability, a 12-bit DAC (2 ch, buffered), and temperature sensor with calibrated VREFINT - all functional down to 1.8 V supply, enabling direct sensor signal conditioning without external components.

Key Specifications

Pinout & Package

LQFP144 (20 × 20 mm) package with 144-pin quad flat lead frame; RoHS-compliant, moisture sensitivity level 3 (MSL3), rated for industrial temperature range (–40 °C to +105 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152ZET6, the STM32L432KCU6 trades EEPROM and LCD for FPU and crypto, while the STM32L072CZT6 reduces feature set and power slightly but sacrifices analog richness and display capability - making STM32L152ZET6 optimal for LCD-equipped, sensor-rich, long-life battery applications.

Availability

STM32L152ZET6 is available at Aetrix Electronics and suitable for portable medical devices, smart utility meters, industrial data loggers, and handheld environmental monitors requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L152ZET6 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 ICs, sensors, and automotive chips since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and industrial-grade reliability - optimized for wearables, metering, and portable instrumentation.

FAQ

What is the maximum operating frequency and core type of the STM32L152ZET6?

The STM32L152ZET6 features an Arm Cortex-M3 core with a maximum CPU frequency of 32 MHz. It achieves 1.25 DMIPS/MHz (Dhrystone 2.1) and includes a Memory Protection Unit (MPU) for enhanced software reliability. The core supports Thumb-2 instruction set and operates across the full industrial temperature range (–40 °C to +105 °C) with dynamic voltage scaling to optimize power vs. performance.

Does the STM32L152ZET6 support USB functionality without external components?

Yes - the STM32L152ZET6 integrates a full-speed USB 2.0 device transceiver with an internal 48 MHz PLL and 1.5 kΩ pull-up resistor on D+. It supports standard USB classes (HID, CDC, MSC) directly from the chip, eliminating the need for external PHY or oscillator. USB operation is validated down to 1.8 V supply and requires only standard USB termination and ESD protection on the PCB.

How does the LCD controller in the STM32L152ZET6 reduce system component count?

The integrated LCD controller supports up to 8 commons × 40 segments with programmable contrast, blinking, and an internal step-up converter. This allows direct driving of segmented LCDs from a single 3 V supply - removing external charge pumps, bias generators, or display driver ICs. The controller operates in Stop mode with RTC wake-up, enabling low-power display updates without waking the CPU.

What are the key low-power modes and their typical current consumption values?

The STM32L152ZET6 offers six low-power modes: Run (195 µA/MHz), Sleep (11 µA), Low-power Run (4.6 µA), Low-power Sleep (1.4 µA), Stop (560 nA), and Standby (290 nA). Standby mode retains RTC and 3 wakeup pins; Stop mode retains full SRAM and registers with 16 wakeup lines. All modes support sub-8 µs wake-up time, enabling rapid response to sensor events while maximizing energy efficiency.