A31L221FU

The A31L221FU is an ultra‑low power 32‑bit microcontroller from ABOV's A31L22x series, built around an ARM Cortex‑M0+ core with operation up to 32 MHz. It combines compact memory (16KB Flash, 4KB SRAM), a rich peripheral set and advanced power management to address embedded control designs for IoT, RF module and detector markets.

Designed for energy‑conscious applications, the device supports a wide supply range (1.71–3.6 V), multiple low‑power modes and integrated analog and communication interfaces to simplify sensor, control and low‑power connectivity designs.

Key Features

• Core: ARM Cortex‑M0+ 32‑bit processor running up to 32 MHz for deterministic embedded control and efficient code execution.
• Memory: 16KB on‑chip Flash program memory and 4KB SRAM with a 32‑byte backup register for compact firmware and runtime data retention.
• Power Management: 1.71–3.6 V supply range with POR, LVR, LVI and internal RC oscillator. Multiple low‑power states including SLEEP and DEEP SLEEP with measured currents as low as 0.99 μA (DEEP SLEEP + RTCC + retention), 0.3 μA (DEEP SLEEP with power control) and 36 nA SHUT DOWN (DEEP SLEEP mode 3). Wakeup time from power modes: 5 μs.
• Timers and RTC: Up to five general purpose 16‑bit timers supporting periodic, one‑shot, PWM and capture functions, plus a Real Time Clock and Calendar for timekeeping and scheduling.
• Analog and Sensors: 12‑bit ADC with 8 channels (0.5 Msps) and two comparators, plus an integrated temperature sensor for precision sensor interfacing and analog monitoring.
• Communications: Rich serial connectivity with I2C (up to 1 Mbps), SPI (up to 16 Mbps), USART, UART and LPUART options to support system communication needs.
• System Reliability and Security: Watchdog Timer, CRC generator (8/16/32‑bit), clock monitoring function and a 128‑bit unique ID for system integrity and diagnostics.
• Debug and Boot: SWD debug interface and USART (UART) ISP supported for development, programming and in‑field updates.
• Package and I/O: 20‑pin QFN (20‑QFN) surface‑mount package with 17 general purpose I/Os for compact board designs.
• Operating Range: Industrial temperature operation from −40 °C to +105 °C for extended environment compatibility.

Typical Applications

• RF Modules – NB‑IoT: Low power operation, compact package and serial interfaces make the A31L221FU suitable for NB‑IoT and other low‑power wireless modules.
• Detectors and Alarms: On‑chip ADC, comparators and RTC simplify sensor acquisition, threshold monitoring and time‑stamped events in gas or alarm detectors.
• IoT and Handheld Devices: Integrated communications, timers and low‑power modes support user interface control, sensor aggregation and battery‑operated handheld equipment.

Unique Advantages

• Ultra‑low power profile: Multiple deep‑sleep options and measured microamp‑level currents reduce energy consumption for battery‑powered systems.
• Compact, feature‑rich integration: On‑chip ADC, comparators, timers, RTC, CRC and multiple serial interfaces reduce external components and simplify BOM.
• Flexible connectivity: SPI, I2C, and USART/UART/LPUART provide a range of options for sensor, peripheral and host communications.
• Industrial temperature capability: −40 °C to +105 °C operation supports deployment in demanding environmental conditions.
• Developer friendliness: SWD debug, USART ISP and standard Cortex‑M0+ architecture streamline development and firmware maintenance.
• Series scalability: Part of the A31L22x family, enabling easy scaling between devices with different Flash sizes and package options within the same product line.

Why Choose A31L221FU?

The A31L221FU delivers a balanced combination of low power, integrated analog and digital peripherals, and industrial temperature range in a small 20‑QFN footprint. Its ARM Cortex‑M0+ core, combined with on‑chip Flash, SRAM and a comprehensive peripheral set, positions it for efficient embedded control in IoT modules, detectors and handheld applications.

Designed as part of ABOV's A31L22x series, the A31L221FU offers a practical migration path across family members and supports rapid development through standard debug and ISP interfaces—helping reduce system complexity and accelerate time to market.

If you would like pricing, lead time or a formal quote for the A31L221FU, request a quote or submit an inquiry and our team will respond with availability and ordering information.