A31L222FU

The A31L222FU from Abov is an ultra-low power 32‑bit microcontroller based on the ARM Cortex‑M0+ core. It integrates 32KB Flash, 4KB SRAM and a broad set of peripherals for embedded control, sensor interfacing and compact IoT designs.

Operating from 1.71V to 3.6V and rated for -40°C to +105°C, the A31L222FU combines low-power modes, fast wake-up and multiple serial interfaces to address cost-sensitive embedded control, IoT/handheld and RF module applications.

Key Features

• Core ARM Cortex‑M0+ 32‑bit core with up to 32 MHz operation for efficient control tasks.
• Memory 32KB internal Flash and 4KB SRAM with 32‑byte backup register for program storage and runtime data.
• Power and Voltage Wide supply range from 1.71V to 3.6V and multiple low-power modes including SLEEP and DEEP SLEEP; documented currents include 78 μA/MHz in RUN, 0.99 μA DEEP SLEEP with RTCC and retention, 0.3 μA DEEP SLEEP with power control, and 36 nA SHUT DOWN (DEEP SLEEP mode 3).
• Analog 12‑bit A/D converter, 8 channels at up to 0.5 MSPS, plus two comparators and an on‑chip temperature sensor for sensor interfacing and monitoring.
• Timers and RTC Five general‑purpose 16‑bit timers (periodic, one‑shot, PWM, capture), a 24‑bit watchdog timer and a Real Time Clock and Calendar (RTCC).
• Connectivity Multiple serial interfaces: 1 × USART, 1 × UART, 1 × LPUART, 1 × I2C (up to 1 Mbps) and 1 × SPI (up to 16 Mbps), supporting common peripheral and sensor buses.
• System Reliability & Utilities CRC generator (8/16/32 bit), POR/LVR/LVI protection, clock monitoring, 128‑bit unique ID and SWD debug interface for development and system integrity.
• I/O and Packages 17 general purpose I/Os and available in a compact 20‑QFN package (4 × 4 × 0.75–0.5 mm) for space‑constrained designs.
• Operating Range Industrial temperature rating from -40°C to +105°C suitable for demanding environments.

Typical Applications

• RF Module – NB‑IoT Low-power operation, compact package and serial interfaces make the device suitable as a control MCU in RF module designs.
• Detector – Gas / Alarm ADC channels, comparators, RTCC and watchdog support reliable sensor monitoring and event detection for alarm systems.
• IoT / Handheld Device Integrated peripherals, low sleep currents and fast wake-up (5 μs) enable battery‑friendly operation in portable and IoT endpoints.

Unique Advantages

• Ultra‑low power profile: Documented run and deep sleep currents (including sub‑microamp DEEP SLEEP modes) reduce battery drain in long‑lived applications.
• High integration: On‑chip Flash, SRAM, ADC, comparators, RTCC, watchdog and multiple serial ports lower BOM and simplify board design.
• Compact packaging: 20‑QFN (4×4×0.75–0.5 mm) with 17 I/Os enables space‑constrained layouts without sacrificing connectivity.
• Industrial temperature support: Rated from -40°C to +105°C for reliable operation across harsh environments.
• Fast wake-up: 5 μs wake-up time from power modes for responsive real‑time behavior in low‑power systems.
• Series scalability: Part of the A31L22x family, offering alternate flash/memory and package options to match different design needs.

Why Choose A31L222FU?

The A31L222FU positions a capable ARM Cortex‑M0+ core with a tightly integrated peripheral set and documented ultra‑low power characteristics, making it well suited for cost‑sensitive embedded control, sensor interfacing and compact IoT or RF module designs. Its industrial temperature rating and small QFN package allow designers to target constrained form factors and harsh environments.

As a member of the A31L22x series, the A31L222FU offers design scalability across package and memory options while providing system reliability features—such as POR/LVR/LVI, watchdog and CRC—that help simplify development and deployment.

Request a quote or contact sales to discuss availability, pricing and how the A31L222FU can fit your next embedded design.