STMicroelectronics STM32L152ZET6D

Overview

STM32L152ZET6D from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller with 512 KB Flash, 80 KB SRAM, 16 KB EEPROM, integrated LCD controller (8×40 segments), USB 2.0 interface, and dual 12-bit DACs. 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 HMI displays.

For engineers reviewing the STM32L152ZET6D datasheet, STM32L152ZET6D pinout, STM32L152ZET6D application, or STM32L152ZET6D equivalent, key selection criteria include standby current (290 nA), RTC-enabled Stop mode (1.11 µA), 102 I/Os with 5V tolerance, LCD driver capability, and USB/ADC/DAC co-integration for single-chip sensor-to-interface solutions.

Technical Context

The device implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby) with hardware-accelerated wakeup (8 µs from Stop). Its Cortex-M3 core runs up to 32 MHz with MPU, ECC-protected memories, and a 96-bit unique ID.

Analog subsystem includes two rail-to-rail op-amps, two ultra-low-power comparators with window mode, a 12-bit 1 Msps ADC (40 channels), and two buffered 12-bit DACs - all functional down to 1.8 V supply. Clock system integrates HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz) oscillators plus a USB PLL.

Key Specifications

Pinout & Package

LQFP144 package (20 × 20 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, industrial temperature grade (–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 STM32L152ZET6D, STM32L432KCU6 trades LCD/EEPROM integration for FPU and lower standby, while STM32L552RET6 adds TrustZone security at the cost of display capability - making STM32L152ZET6D optimal for cost-sensitive, display-equipped, battery-constrained edge devices.

Availability

STM32L152ZET6D is available at Aetrix Electronics and suitable for battery-powered medical sensors, smart utility meters, industrial HMI controllers, and portable data loggers requiring stable component supply across extended product lifecycles.

Supply support for STM32L152ZET6D 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 analog components for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications demanding multi-year battery life, robust analog integration, and industrial-grade reliability - specifically optimized for metering, portable healthcare, and smart infrastructure.

FAQ

What is the maximum operating frequency and core type of STM32L152ZET6D?

The STM32L152ZET6D features an Arm Cortex-M3 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 task isolation. The maximum frequency is sustained across the full industrial temperature range (–40 °C to +105 °C) under 1.65–3.6 V supply conditions.

Does STM32L152ZET6D support USB device functionality without external components?

Yes - it integrates a full-speed USB 2.0 device transceiver with internal 1.5 kΩ pull-up resistor on PA12 (D+), supporting CDC, HID, and MSC classes. No external PHY, resistors, or crystal is required; the internal 48 MHz PLL generates the USB clock from the HSE or MSI oscillator.

How many I/O pins are 5V tolerant, and what is the total GPIO count?

STM32L152ZET6D provides 116 general-purpose I/O pins in the LQFP144 package, of which 102 are 5V tolerant. This allows direct interfacing with legacy 5V logic, sensors, and displays without level shifters - confirmed per Section 6.3.13 (I/O port characteristics) of DS10002 Rev 10.

What LCD capabilities does STM32L152ZET6D offer, and are they present in all variants?

This part includes an integrated LCD controller supporting up to 8 commons × 40 segments, with programmable contrast, blinking mode, and internal step-up converter (VLCD pin). LCD functionality is exclusive to STM32L152xE variants - absent in STM32L151xE - as explicitly stated in the device overview (DS10002 p.2, Table 1).