A31L214KU

The A31L214KU is an ultra‑low‑power 32‑bit microcontroller based on the ARM Cortex‑M0+ core, delivering up to 128KB of Flash, 4KB of data flash and 20KB of SRAM. It combines a rich set of peripherals and low‑power modes to serve embedded designs that require efficient processing, secure functions and extensive serial connectivity.

Designed for industrial and consumer embedded applications, the device targets smart metering, smart card readers, home/building control, IoT sensor nodes and portable electronics where low power, compact packaging and integrated security/peripheral features reduce BOM and design complexity.

Key Features

• Core ARM Cortex‑M0+ 32‑bit processor running up to 32 MHz for compact, deterministic embedded control.
• Memory 128KB internal Flash, 4KB data flash and 20KB SRAM with a 32‑byte backup register for program storage, data retention and in‑system updates.
• Power and Low‑Power Modes Operates from 1.71V to 3.6V with multiple low‑power modes: 90 µA/MHz in RUN mode, 13 µA in low‑speed RUN, 0.99 µA DEEP SLEEP with RTCC + retention, 0.35 µA DEEP SLEEP with power control and 45 nA SHUT DOWN (DEEP SLEEP mode 3). Typical wakeup time is 5 µs from power modes.
• Analog and Data Conversion 12‑bit A/D converter (8 channels) suitable for sensor interfaces and analog measurement tasks; internal temperature sensing and comparator support are included in the device family.
• Connectivity Multiple serial interfaces including I2C (3 channels), SPI (up to 16 Mbps where applicable), 2× USART, 1× UART and 2× LPUART plus a smart card (SC) interface for secure smart‑card and embedded communication functions.
• Timers, DMA and RTC Four 16‑bit timers, Real Time Clock and Calendar (RTCC), watchdog timer and seven DMA channels enable flexible real‑time control and background data movement without CPU overhead.
• Security and System Integrity Integrated AES‑128 engine, True Random Number Generator (RNG), CRC unit and 128‑bit unique ID for secure data handling and integrity checks.
• System Peripherals Internal RC oscillator, POR/LVI/LVR, clock monitoring and SWD debug interface to simplify system bring‑up and robustness.
• Package and Environmental Range Available in a compact 32‑QFN package (32‑QFN 0505) with 28 I/O pins and an operating temperature range of −40°C to +105°C for industrial applications.

Typical Applications

• Smart Meters — Reliable metrology and communications with low‑power operation, onboard ADC channels and secure AES support for encrypted data handling.
• Smart Card Readers — Integrated smart card interface, serial communication ports and secure cryptographic engine suited for secure transaction processing.
• Building & Home Control — Low standby current, RTC/calendar and multiple serial buses make it suitable for access control, lighting and HVAC controllers.
• IoT Sensor Nodes & Wireless Sensors — Small QFN package, low‑power modes and ADC inputs enable battery‑efficient sensor interfacing and local processing.
• Portable Consumer & Healthcare Devices — Compact footprint, fast wakeup and multiple timers/DMAs support responsive user interfaces and data capture in portable equipment.

Unique Advantages

• Ultra‑Low Power Operation: Multiple sleep modes down to tens of nanoamperes and quick 5 µs wakeup reduce energy consumption for battery‑powered designs.
• Balanced Integration: On‑chip Flash, data flash, SRAM and a broad peripheral set reduce external components and simplify PCB routing.
• Security Built In: AES‑128 and a hardware RNG provide on‑device cryptographic capabilities for secure communications and data protection.
• Flexible Connectivity: Multiple UART/USART/LPUART, I2C and SPI interfaces cover typical peripheral and sensor buses used in embedded systems.
• Compact Industrial Packaging: 32‑QFN package with 28 I/O and −40°C to +105°C operation suits space‑constrained industrial applications requiring extended temperature ranges.

Why Choose A31L214KU?

The A31L214KU positions itself as a compact, low‑power microcontroller that balances processing capability with a comprehensive peripheral set and on‑chip security. Its ARM Cortex‑M0+ core, 128KB Flash and 20KB SRAM are complemented by AES‑128, RNG, ADC and multi‑channel serial interfaces to address embedded designs that require efficient control, secure data handling and minimized BOM.

This device is well suited for designers of industrial and consumer embedded systems—particularly where power efficiency, secure communications and small form factor are priorities. The integrated timers, DMA and RTC features help offload routine tasks from the CPU, supporting responsive and energy‑efficient products with straightforward software integration and debugging via the SWD interface.

Please request a quote or submit a sales inquiry to receive pricing and availability for the A31L214KU. Our team can provide lead‑time details and volume pricing upon request.