STMicroelectronics STM32L162RDY6TR

Overview

STM32L162RDY6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller with 384 KB Flash, 48 KB SRAM, 12 KB EEPROM, integrated LCD driver, 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 medical sensors, portable industrial meters, and smart utility endpoints requiring long runtime and secure firmware updates.

For engineers reviewing the STM32L162RDY6TR datasheet, STM32L162RDY6TR pinout, STM32L162RDY6TR application, or STM32L162RDY6TR equivalent, key selection criteria include standby current (305 nA), 12-bit ADC with 40-channel multiplexing, 2× DAC outputs with buffers, ultra-low-power comparators with wakeup capability, and support for dynamic voltage scaling down to 1.65 V.

Technical Context

The device implements a dual-bank Flash architecture enabling Read-While-Write (RWW) operation for seamless firmware updates without halting execution. Its low-power strategy integrates multiple clock domains - including independent 32 kHz RTC oscillator with calibration, 16 MHz HSI RC (+/-1%), and PLL for USB 48 MHz generation - managed via programmable voltage scaling (PVS) across three operating ranges.

Analog subsystem integration includes three operational amplifiers, two ultra-low-power comparators with window mode and wakeup capability, and a 12-bit ADC capable of 1 Msps sampling across up to 40 channels. The LCD controller supports up to 8×40 segments with on-board step-up converter and contrast adjustment.

Key Specifications

Pinout & Package

STM32L162RDY6TR uses a 64-ball WLCSP (Wafer-Level Chip-Scale Package) with 0.4 mm pitch and 3.5 × 3.5 mm footprint. Ball mapping follows JEDEC MO-220 standard with VDD/VSS power distribution optimized for low-noise analog and digital domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L162RDY6TR, STM32L432KCU6 offers superior computational throughput but lacks EEPROM and LCD support, while STM32L072RBT6 reduces cost and size at the expense of USB, LCD, and ultra-low-power analog features critical for metering and portable HMI.

Availability

STM32L162RDY6TR is available at Aetrix Electronics and suitable for battery-powered medical devices, smart utility meters, and portable industrial analyzers requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L162RDY6TR 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, specializing in microcontrollers, power management, MEMS, and automotive ICs.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and secure firmware execution - particularly in portable healthcare, energy metering, and environmental monitoring.

FAQ

What is the maximum operating frequency and corresponding voltage range for STM32L162RDY6TR?

The STM32L162RDY6TR operates up to 32 MHz when supplied between 2.4 V and 3.6 V. At 1.65–2.4 V, maximum frequency is reduced to 16 MHz via dynamic voltage scaling. This dual-range operation ensures optimal power/performance trade-offs across varying battery states in portable equipment.

Does STM32L162RDY6TR support USB device functionality without external components?

Yes - it integrates a full-speed USB 2.0 transceiver with internal 1.5 kΩ pull-up resistor on USB_DP, eliminating the need for external termination or level-shifting components. The internal 48 MHz PLL generates the required USB clock from the HSI or HSE source, enabling plug-and-play USB device operation.

How does the 12 KB EEPROM differ from standard Flash in terms of endurance and usage?

The 12 KB true EEPROM supports 100,000 write/erase cycles and 40-year data retention at 85°C, significantly exceeding standard Flash endurance (10,000 cycles). It is accessed via dedicated instructions and supports byte-level writes, making it ideal for frequent parameter storage (e.g., calibration coefficients, metering registers) without wear-leveling overhead.

Can the LCD controller drive segment-based displays without external bias generation?

Yes - the integrated LCD controller includes an on-chip step-up converter that generates adjustable VLCD voltage (up to 5.5 V) from the main VDD supply. This eliminates external DC-DC boosters and allows direct driving of 8×40 segment displays with programmable contrast and blinking modes.