The STM32L162RET6 from STMicroelectronics is an ultra-low-power 32-bit microcontroller from the STM32L1 family. It is based on an Arm Cortex-M3 core operating at up to 32MHz, delivering approximately 33.3 DMIPS maximum processing performance for low-power industrial, portable, and embedded-control applications.
The device integrates 512KB of embedded Flash, 80KB of SRAM, and 16KB of true data EEPROM. The Flash is arranged as two 256KB banks with Read-While-Write capability and ECC, while the EEPROM provides nonvolatile storage for parameters, calibration information, and system configuration.
Integrated security and system features include an AES-128 hardware encryption accelerator, CRC calculation unit, 96-bit unique device ID, and a Memory Protection Unit within the Cortex-M3 core. These resources support device identification, data integrity, and embedded security functions.
Analog peripherals include a 12-bit 1Msps ADC, two 12-bit DAC channels, two operational amplifiers, and two ultra-low-power comparators. The ADC supports up to 40 channels across the STM32L162xE device family for sensor acquisition and analog-control applications.
Communication interfaces include USB 2.0, up to five USART/UART interfaces, three SPI interfaces, two I²S interfaces, and two I²C interfaces with SMBus and PMBus compatibility. DMA, 16-bit and 32-bit timers, and independent and window watchdogs are also integrated.
An integrated LCD controller can drive up to 8 × 40 LCD segments and includes an internal LCD voltage generator, contrast adjustment, and blinking capability. Up to 34 capacitive-sensing channels are also available for implementing touch keys, sliders, and basic touch interfaces.
The STM32L162 platform is optimized for low-power operation and can operate from supplies down to approximately 1.65V, depending on brownout-reset configuration. ST specifies typical power figures including 290nA Standby current, 560nA Stop current, and approximately 195μA/MHz in Run mode.
The STM32L162RET6 is supplied in a 64-pin LQFP package measuring 10 × 10 × 1.4mm and is classified as an industrial-grade product. ST currently lists the exact orderable part as Active and in volume production.
Key Specifications
- Manufacturer: STMicroelectronics
- Manufacturer Part Number: STM32L162RET6
- Product Family: STM32L1 / STM32L162
- Device Type: Ultra-Low-Power 32-Bit MCU
- CPU Core: Arm Cortex-M3
- Maximum CPU Frequency: 32MHz
- Maximum Performance: Approximately 33.3 DMIPS
- Flash Memory: 512KB
- Flash Banks: 2 × 256KB
- SRAM: 80KB
- Data EEPROM: 16KB
- Hardware Encryption: AES-128
- CRC Unit: Integrated
- Unique Device ID: 96 Bits
- MPU: Supported
- ADC: 12-Bit, Up to 1Msps
- ADC Channels: Up to 40
- DAC: 2 × 12-Bit
- Operational Amplifiers: 2
- Ultra-Low-Power Comparators: 2
- LCD Controller: Up to 8 × 40 Segments
- Capacitive Sensing: Up to 34 Channels
- USB: USB 2.0
- USART: Up to 3
- UART: Up to 2
- SPI: Up to 3
- I²S: Up to 2
- I²C: 2
- SMBus / PMBus: Supported
- DMA Channels: 12
- 32-Bit Timers: 1
- 16-Bit Timers: Multiple
- Watchdogs: Independent and Window
- RTC: Integrated
- Supply Voltage: Approximately 1.65V to 3.6V Depending on BOR Configuration
- Typical Standby Current: 290nA
- Typical Stop Current: 560nA
- Typical Run Consumption: 195μA/MHz
- Wake-Up Time: Approximately 8μs
- Debug Support: SWD, JTAG, and Trace
- Bootloader: USB and USART Support
- Package: LQFP-64
- Package Size: 10 × 10 × 1.4mm
- Product Grade: Industrial
- RoHS Grade: Ecopack2
- Product Status: Active / Volume Production
Typical Applications
Suitable for low-power industrial controllers, portable instrumentation, smart metering, data-acquisition systems, sensor nodes, medical electronics, battery-powered equipment, LCD-based interfaces, and embedded systems requiring integrated USB, analog peripherals, EEPROM, and ultra-low-power operating modes.
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