STMicroelectronics STM32L152ZCT6TR

Overview

STM32L152ZCT6TR 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 controller (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 medical sensors, portable industrial meters, and smart utility meters requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L152ZCT6TR datasheet, STM32L152ZCT6TR pinout, STM32L152ZCT6TR application, or STM32L152ZCT6TR equivalent, key selection criteria include standby current (305 nA), 12-bit ADC (1 Msps, 40 channels), dual 12-bit DACs, ultra-low-power comparators with wake-up capability, and LQFP144 package compatibility with LCD segment drive.

Technical Context

The device implements dynamic voltage scaling and multiple low-power modes-including Stop mode (0.475 µA) and Standby mode (305 nA)-with hardware-accelerated wakeup on up to 16 lines or 3 pins. Its Cortex-M3 core supports Thumb-2 instruction set, MPU, and 8 µs wakeup from Stop mode.

Analog subsystem includes two operational amplifiers, two ultra-low-power comparators (window mode + wake-up), 12-bit ADC with internal reference and temperature sensor, and dual 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), plus a dedicated PLL for USB (48 MHz).

Key Specifications

Pinout & Package

LQFP144 package (20 × 20 mm, 0.5 mm pitch) with exposed thermal pad; 144-pin square quad flat pack suitable for automated assembly and thermal management in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152ZCT6TR, STM32L432KCU6 offers higher compute throughput at the expense of analog integration and EEPROM, while STM32L072RBT6 trades feature depth for lower BOM cost and marginally better ultra-low-power efficiency in minimal configurations.

Availability

STM32L152ZCT6TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical sensors, industrial panel meters, and wireless sensor node hubs requiring stable component supply and long-term production continuity.

Supply support for STM32L152ZCT6TR 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 semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust memory reliability - optimized for metering, wearables, and industrial IoT endpoints.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L152ZCT6TR achieves up to 32 MHz CPU frequency with 230 µA/MHz typical current draw in Run mode when executing from Flash. At 32 MHz, total active current is approximately 7.4 mA (230 µA × 32), verified per DS10262 Rev 8 Table 17. Dynamic voltage scaling adjusts core voltage to maintain efficiency across frequency ranges.

Does this MCU support hardware encryption or secure boot features?

No. The STM32L152ZCT6TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. Security relies on software-implemented algorithms and external secure elements. For certified secure boot, ST recommends STM32L5 or STM32H5 series devices with TrustZone and embedded secure firmware install (SFI).

Can the internal 8 KB EEPROM be used for storing calibration data across power cycles?

Yes. The 8 KB true EEPROM supports 400 k write/erase cycles and 20-year data retention at 55°C, with built-in ECC for bit-error correction. It is accessed via standard HAL drivers and retains values through all power modes including Standby, making it suitable for factory calibration coefficients and user configuration parameters.

Is the LQFP144 package RoHS-compliant and lead-free?

Yes. The STM32L152ZCT6TR in LQFP144 packaging meets RoHS Directive 2011/65/EU and is lead-free, with matte tin (Sn) termination finish. JEDEC-standard reflow profile (peak 260°C, 10 s max) applies, and moisture sensitivity level is MSL3 per J-STD-020.