STMicroelectronics STM32L152RCT6D

Overview

STM32L152RCT6D 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 (up to 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 is deployed in battery-powered medical sensors, portable industrial meters, and smart utility metering systems requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L152RCT6D datasheet, STM32L152RCT6D pinout, STM32L152RCT6D application, or STM32L152RCT6D equivalent, key selection criteria include standby current (0.29 µA), 12-bit ADC with 25 channels and 1 Msps sampling, dual 12-bit DACs with output buffers, ultra-low-power comparators with wake-up capability, and LCD driver support without external bias circuitry.

Technical Context

The STM32L152RCT6D implements dynamic voltage scaling and multiple low-power modes-Stop (0.44 µA), Standby (0.29 µA), and Low-power Run (8.6 µA)-with sub-8 µs wake-up latency. Its Cortex-M3 core runs at up to 32 MHz using internal 16 MHz RC (+/−1%) or external crystal sources, supported by a dedicated 48 MHz PLL for USB timing.

Analog subsystem integration includes two operational amplifiers, two ultra-low-power comparators (window mode + wake-up), 12-bit ADC (25-channel, 1 Msps), and dual 12-bit DACs with output buffers-all functional down to 1.8 V supply. The LCD controller supports contrast adjustment, blinking, and integrated step-up converter for segment bias generation.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with 51 I/Os (47 5V-tolerant), including dedicated LCD segment/common pins, USB D+/D−, and 16 external interrupt-capable lines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152RCT6D, STM32L432KCU6 trades LCD/ECC EEPROM for FPU and deeper sleep, while EFM32PG12B500F1024GL125 sacrifices USB and display integration for larger memory and RF-ready packaging-making STM32L152RCT6D optimal for cost-sensitive, display-equipped, USB-configurable portable instrumentation.

Availability

STM32L152RCT6D is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial handheld testers, and environmental data loggers requiring stable component supply and long-term production support.

Supply support for STM32L152RCT6D 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-grade components since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust operation across industrial temperature ranges-optimized for portable instrumentation, energy metering, and wearable health devices.

FAQ

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

The STM32L152RCT6D achieves a maximum CPU frequency of 32 MHz. At this speed, typical current consumption is 185 µA/MHz when executing code from Flash, resulting in ~5.92 mA total. This value assumes VDD = 3.3 V, ambient temperature of 25 °C, and all peripherals disabled except core logic and Flash interface.

Does the part support hardware encryption or secure boot features?

No. The STM32L152RCT6D does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. Security relies on software-implemented algorithms and external secure elements. For certified secure boot, consider STM32L4+, STM32H5, or STM32U5 series MCUs with TrustZone or proprietary secure firmware solutions.

Can the internal 16 MHz RC oscillator be used as the system clock source without calibration?

Yes-the HSI RC oscillator is factory-trimmed to ±1% accuracy at 16 MHz and can serve as the main system clock without external crystal or runtime calibration. It supports all low-power modes and is recommended for cost-sensitive designs where USB or precise RTC timing is not required.

Is the LCD driver compatible with static, multiplexed, or dot-matrix displays?

The LCD controller supports only static and multiplexed (up to 8 commons) segmented displays-not dot-matrix or graphic LCDs. It drives up to 320 segments (8×40) with built-in contrast control, blinking, and internal step-up converter, making it ideal for numeric/alpha-numeric instrument displays but unsuitable for pixel-addressable screens.