STMicroelectronics STM32L162RDT6

Overview

STM32L162RDT6 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 hardware AES-128 encryption accelerator. It operates from 1.65 V to 3.6 V across –40°C to +105°C and targets battery-powered portable instrumentation and smart meters requiring long runtime and secure data handling.

For engineers reviewing the STM32L162RDT6 datasheet, STM32L162RDT6 pinout, STM32L162RDT6 application, or STM32L162RDT6 equivalent, key selection criteria include standby current (305 nA), LCD driver capability, USB 2.0 support with internal 48 MHz PLL, 12-bit ADC (1 Msps, up to 40 channels), and AES hardware acceleration for firmware/data security.

Technical Context

The STM32L162RDT6 implements dynamic voltage scaling and multiple low-power modes-Stop mode (0.475 µA), Standby mode (305 nA), and Low-power run mode (11 µA)-with sub-8 µs wakeup latency. Its memory subsystem includes dual-bank Flash (192 KB each) enabling Read-While-Write (RWW) and ECC-protected 12 KB true EEPROM for robust nonvolatile parameter storage.

It integrates a full-featured analog front-end: three operational amplifiers, two 12-bit DACs with output buffers, two ultra-low-power comparators with window mode and wakeup capability, and a temperature sensor. Clock architecture supports multiple sources including HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), and MSI (65 kHz–4.2 MHz), with a dedicated PLL for USB clock generation.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm) package with 51 general-purpose I/Os (45 5V-tolerant), 16 external interrupt vectors, and dedicated pins for USB D+/D−, LCD segment/common outputs, ADC/DAC/OpAmp interfaces, and multiple clock inputs (HSE, LSE, HSI, MSI).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L162RDT6, STM32L432KCU6 offers superior compute density and lower standby but lacks integrated LCD and true EEPROM; STM32L072RBT6 reduces cost and footprint but sacrifices USB, LCD, and advanced analog features-making STM32L162RDT6 optimal for display-equipped, secure, battery-powered instrumentation.

Availability

STM32L162RDT6 is available at Aetrix Electronics and suitable for smart energy metering, portable medical devices, industrial wireless sensor nodes, and secure IoT edge controllers requiring stable component supply and long-term manufacturability.

Supply support for STM32L162RDT6 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 semiconductors.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust security, and rich analog integration-especially in metering, wearables, and industrial sensing.

FAQ

What is the maximum operating frequency and core type of the STM32L162RDT6?

The STM32L162RDT6 uses an Arm® Cortex®-M3 32-bit 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 system reliability. The core supports Thumb-2 instruction set and operates across the full 1.65 V to 3.6 V supply range.

Does the STM32L162RDT6 support hardware encryption, and what algorithms are implemented?

Yes, the STM32L162RDT6 includes a dedicated hardware AES-128 encryption accelerator supporting ECB, CBC, CTR, and GCM modes. It offloads cryptographic operations from the CPU, enabling secure firmware updates and data-at-rest protection without impacting real-time performance or increasing power consumption during encryption tasks.

How many I/O pins does the STM32L162RDT6 have, and which are 5V tolerant?

The STM32L162RDT6 in LQFP64 package provides 51 general-purpose I/O pins, of which 45 are 5V tolerant. All GPIOs are individually configurable and mappable to 16 external interrupt vectors, supporting flexible peripheral routing and low-latency wakeup from Stop/Standby modes.

What LCD capabilities does the STM32L162RDT6 offer, and what is its segment drive capacity?

The STM32L162RDT6 integrates a static/dot-matrix LCD controller supporting up to 8 commons and 40 segments (8×40). It includes an on-board step-up converter, programmable contrast adjustment, blinking mode, and software-controlled bias generation-eliminating the need for external LCD bias ICs in portable display applications.