A31L122KN

The A31L122KN is an ultra-low power microcontroller based on the ARM Cortex-M0+ core, offering 32 Kbytes of Flash and 8 Kbytes of SRAM. Designed for battery-operated and resource-constrained embedded systems, it combines a low-voltage operating range (1.65 V–3.6 V) with integrated analog, timing and communication peripherals for compact, power-efficient designs.

Targeted applications include smart meters, smart card readers, building/home control and portable IoT or consumer devices where low power, integrated peripherals and broad temperature support are important design drivers.

Key Features

• Core  ARM Cortex-M0+ 32-bit core running at up to 32 MHz for deterministic control and efficient code density.
• Memory  32 Kbytes of internal Flash and 8 Kbytes of SRAM with 32-byte backup register for code and runtime data.
• Power and Voltage  Operates from 1.65 V to 3.6 V with ultra-low power modes: 78 µA/MHz in Run, 12 µA in low-frequency Run (32.768 kHz / 40 kHz), 1.3 µA Deep Sleep with RTCC + retention, and 0.6 µA Deep Sleep with power control. Fast wakeup time of 8 µs from all power modes.
• Timers & DMA  Multiple 16-bit general-purpose timers (five timers available in the series) and up to five DMA channels to offload repetitive data movement and improve real-time responsiveness.
• Analog & Display  12-bit A/D converter (A31L122KN: 10 input channels, up to 1 Msps) and two comparators; integrated LCD driver supporting segmented displays and contrast control for user interfaces.
• Connectivity  Rich serial interfaces including USART, multiple UARTs, I2C and SPI, plus smart card interfaces for secure readers and payment devices.
• System Reliability & Security  Watchdog Timer (24-bit), POR/LVR/LVI power management, CRC generator and a 128-bit unique ID for system integrity and device identification.
• Package & Environmental  32-LQFP package option and operating temperature range from −40 °C to +105 °C suitable for commercial and industrial deployments.

Typical Applications

• Smart Card Readers  Smart card interfaces combined with low-voltage operation and integrated timers make the A31L122KN suitable for payment and authentication terminals.
• Building & Home Control  RTC/Calendar, low-power modes, timers and LCD driver enable energy-efficient controllers for door locks, access systems and user panels.
• IoT & Wireless Sensors  Ultra-low power modes, fast wakeup and on-chip ADC/communications support battery-powered sensor nodes and remote monitoring devices.
• Portable Consumer & Healthcare Devices  Compact memory footprint, analog inputs and integrated peripherals reduce BOM and support portable instrumentation and handheld devices.

Unique Advantages

• Highly integrated peripheral set: ADC, comparators, LCD driver, smart card interfaces, timers and DMA reduce external components and simplify board design.
• Ultra-low power modes with fast wakeup: Sub-microamp deep sleep options and an 8 µs wakeup time help extend battery life while maintaining responsive operation.
• Flexible supply range: 1.65 V–3.6 V operation supports a wide variety of battery chemistries and single-supply designs.
• Compact packaging and industrial temperature range: 32-LQFP package and −40 °C to +105 °C operation enable space-constrained, robust applications.
• Robust system features: Integrated watchdog, POR/LVR/LVI and CRC support reliable operation and simplify safety and integrity implementations.

Why Choose A31L122KN?

The A31L122KN positions itself as a compact, energy-efficient microcontroller for embedded designs that demand integrated analog, timing and communication peripherals without sacrificing low-power operation. Its ARM Cortex-M0+ core, 32 Kbytes Flash and 8 Kbytes SRAM provide a balanced platform for control, communication and user-interface tasks.

Choose the A31L122KN for designs that require long battery life, a wide operating voltage range, and a rich set of on-chip peripherals to reduce BOM and accelerate time-to-market. Its industrial temperature range and integrated system features make it suitable for both commercial and industrial embedded applications.

Request a quote or submit a quotation request to receive pricing and lead-time information for the A31L122KN. Our team will provide the details you need to evaluate this microcontroller for your project.