STMicroelectronics STM32L152RDY6TR

Overview

STM32L152RDY6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 384 KB Flash, 48 KB SRAM, 12 KB EEPROM with ECC, 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 targets battery-powered medical sensors, portable industrial loggers, and smart utility meters requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L152RDY6TR datasheet, STM32L152RDY6TR pinout, STM32L152RDY6TR application, or STM32L152RDY6TR equivalent, key selection criteria include standby current (305 nA), RTC-enabled Stop mode (1.15 µA), 12-bit ADC with 40-channel support, LCD driver capability, and 102 5V-tolerant I/Os - all validated for operation down to 1.8 V analog supply.

Technical Context

This MCU implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with hardware-accelerated wake-up from Stop in 8 µs. Its memory subsystem includes dual-bank Flash enabling Read-While-Write (RWW), ECC-protected SRAM and EEPROM, and FSMC supporting SRAM, PSRAM, and NOR Flash expansion.

The analog subsystem integrates three operational amplifiers, two ultra-low-power comparators with window mode and wakeup capability, a temperature sensor, and internal voltage reference (VREFINT). Clock architecture combines HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a PLL for USB (48 MHz) and CPU clock generation.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 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 STM32L152RDY6TR, STM32L432KCU6 trades LCD/E²PROM for FPU and lower standby, while STM32L072RBT6 reduces feature set and power efficiency to meet budget constraints - both require external components to replicate full analog and display functionality.

Availability

STM32L152RDY6TR is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and guaranteed traceability.

Supply support for STM32L152RDY6TR 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-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 energy-constrained IoT endpoints and portable instrumentation.

FAQ

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

The STM32L152RDY6TR achieves a maximum CPU frequency of 32 MHz. At this speed, typical Run mode current consumption is 230 µA/MHz when executing code from Flash, resulting in ~7.4 mA total. This value assumes VDD = 3.3 V, ambient temperature of 25°C, and all peripherals disabled except core logic - actual consumption scales with active peripherals and supply voltage.

Does STM32L152RDY6TR support hardware encryption or secure boot features?

No, the STM32L152RDY6TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or dedicated secure boot ROM. It relies on software-based security libraries and external secure elements for authentication and firmware integrity. Secure boot must be implemented externally or via trusted execution environment extensions not present in this device family.

Can the integrated LCD controller drive graphic LCDs or only segment-based displays?

The LCD controller supports only static and multiplexed segment-type LCDs (up to 8 commons × 40 segments). It lacks graphics RAM, pixel-addressable framebuffer, or TFT interface capabilities. Driving graphic LCDs requires external controllers or migration to STM32F4/F7/G0 series with parallel RGB or SPI TFT interfaces.

What debug interfaces are supported, and is SWD sufficient for full development?

The device supports Serial Wire Debug (SWD), JTAG, and Embedded Trace Macrocell™ (ETM). SWD is fully sufficient for programming, real-time debugging, and profiling - it uses only two pins (SWCLK/SWDIO) and provides identical functionality to JTAG for standard development workflows. ETM enables instruction trace capture when used with compatible debug probes like ST-LINK/V3.