A31L221FR

The Abov A31L221FR is an ultra-low power 32-bit microcontroller based on the ARM Cortex-M0+ core, integrating 16 Kbytes of Flash and 4 Kbytes of SRAM. It operates from 1.71 V to 3.6 V, runs at up to 32 MHz, and targets compact, battery-conscious embedded designs.

Engineered for IoT, handheld and sensor-driven applications, the device combines high-efficiency operation with integrated analog and communication peripherals to simplify designs that require low-power standby, real-time clock capability and multi-protocol connectivity.

Key Features

• Core ARM Cortex-M0+ 32-bit processor running up to 32 MHz for efficient control and deterministic real-time response.
• Memory 16 Kbytes of on-chip Flash and 4 Kbytes of SRAM with a 32-byte backup register to store critical state across low-power modes.
• Power and Voltage Operates from 1.71 V to 3.6 V with ultra-low power modes: RUN, SLEEP/DEEP SLEEP, and shutdown. Multiple deep-sleep current figures available for aggressive energy budgeting.
• Analog and Sensing 12-bit ADC with 8 channels at up to 500 ksps, plus integrated temperature sensor and two comparators for direct sensor interfacing and local signal monitoring.
• Timers and RTC Five general-purpose timers providing periodic, one-shot, PWM and capture functions, plus a Real Time Clock and Calendar (RTCC) for timekeeping in low-power modes.
• Connectivity Multiple serial interfaces including USART, UART, LPUART, I2C and SPI to support a wide range of peripheral and network connections.
• System Reliability Watchdog timer, POR/LVI/LVR, CRC generator (8/16/32-bit) and clock-monitoring functions to enhance system robustness.
• Low-Power Performance Industry-focused low-power metrics from the datasheet (including sub-microamp deep-sleep states and microsecond wakeup) to extend battery life in autonomous devices.
• Package and Temperature Available in a 20‑TSSOP surface-mount package and specified for operation from −40 °C to +105 °C.
• Development and Debug SWD debug interface and USART (UART) ISP support for firmware development and field programming.

Typical Applications

• RF Modules – NB‑IoT Low-power operation and serial interfaces allow the A31L221FR to serve as a control and sensor hub in LPWAN and NB‑IoT modules.
• Detectors and Alarms Integrated ADC, comparators and low-power RTC make the device well suited for battery-powered gas detectors and alarm systems requiring periodic sampling and event monitoring.
• IoT and Handheld Devices Compact memory, rich peripheral set and sub-microamp deep-sleep modes support sensor nodes, user interfaces and portable electronics that demand long standby life.

Unique Advantages

• Ultra-low power portfolio: Deep sleep currents down to the nanoamp range and fast wake-up (as specified) enable aggressive power management for battery-operated products.
• Integrated analog front end: 12-bit ADC (8 channels), temperature sensor and comparators reduce external components needed for sensor interfacing.
• Compact integration: Flash, SRAM, timers, RTCC, CRC and multiple serial interfaces in a 20‑TSSOP simplify BOM and PCB real estate for small form-factor designs.
• Robust system features: Watchdog timer, POR/LVI/LVR and clock monitoring improve reliability for unattended or safety-related applications.
• Flexible connectivity: USART/UART/LPUART, I2C (up to 1 Mbps) and SPI (up to 16 Mbps) support a wide range of peripherals and host interfaces.
• Industrial temperature range: Specified operation from −40 °C to +105 °C for extended-environment deployments.

Why Choose A31L221FR?

The A31L221FR positions itself as a compact, energy-efficient microcontroller that balances computational capability with integrated analog and connectivity peripherals. Its ARM Cortex‑M0+ core, combined with multiple low-power operating states and comprehensive system features, makes it well suited for designers building battery-powered IoT nodes, sensor platforms, handheld controls and compact communication modules.

With on-chip Flash and SRAM, ADC and comparator resources, RTC and robust system safeguards, the A31L221FR reduces external component count and streamlines designs that require reliable, long-life operation across a wide temperature range.

Request a quote or submit a sales inquiry to discuss availability, pricing and lead times for the A31L221FR. Our team can provide additional technical details and support for integrating this microcontroller into your next design.