A31L123KN

The A31L123KN from Abov is an ultra-low power microcontroller in the A31L12x series, built around an ARM Cortex-M0+ core running up to 32 MHz. It integrates up to 64 Kbytes of Flash, 8 Kbytes of SRAM, a 12-bit A/D converter, multiple timers and DMA, and power-management features tailored to battery-operated and embedded applications.

Designed for compact, low-power systems, the A31L123KN targets consumer and industrial embedded applications requiring efficient processing, mixed-signal interfacing and extended battery life within a 32‑pin LQFP package and an operating range of -40 °C to +105 °C.

Key Features

• Core – ARM Cortex-M0+ core at up to 32 MHz, providing a compact RISC architecture for embedded control and real-time tasks.
• Memory – 64 Kbytes of internal Flash and 8 Kbytes of SRAM with 32‑byte backup register for program and runtime data storage.
• Power and Low-Power Modes – 1.65 V to 3.6 V supply range. Ultra-low power figures from the datasheet: 78 µA/MHz in run mode, 12 µA run mode at low clock sources, 1.3 µA deep sleep with RTCC and retention, 0.6 µA deep sleep with power control, and an 8 µs wakeup time from power modes.
• Timers & DMA – Five general-purpose 16-bit timers supporting periodic, one-shot, PWM and capture operations, plus five DMA channels for peripheral-to-memory offload.
• Analog – 12-bit ADC with up to 10 input channels on this variant, plus two comparators and a CRC unit for data integrity.
• Interfaces and Connectivity – Communication set for this device includes 1×USART, 2×UART, 1×I2C and 1×SPI along with 2×Smart Card interfaces; supports USART ISP for in-system programming.
• System & Reliability – Integrated watchdog timer, real time clock/calendar (RTCC), power-on reset (POR), low-voltage interrupt (LVI) and low-voltage reset (LVR) for robust system operation.
• Display & Special Peripherals – LCD driver supporting up to 8×29 segments with 16-step contrast control, plus internal RC oscillator and 128-bit unique ID.
• Package & Environmental – 32‑pin LQFP (7×7‑0.8 mm) with 26 I/O pins, operating temperature range −40 °C to +105 °C for commercial and industrial usage scenarios.

Typical Applications

• Smart Meters – Low-power operation and on-board ADC and RTC enable long-term metering and timestamped data logging in compact meter designs.
• Smart Card Readers – Integrated smart card interfaces and secure peripherals simplify reader electronics and system integration.
• Building & Home Control – Timers, multiple UART/I2C/SPI ports and LCD driver support user interfaces, sensor networks and actuator control in access and automation systems.
• IoT & Wireless Sensors – Ultra-low sleep currents, fast wakeup and DMA-equipped peripherals reduce average power for battery-powered sensor nodes and IoT endpoints.
• Portable Healthcare & Consumer Devices – Compact package, mixed-signal capability and low-voltage operation support portable instruments and handheld electronics.

Unique Advantages

• Highly integrated MCU – 64 KB Flash, 8 KB SRAM, 12‑bit ADC, comparators, LCD driver and smart-card interfaces reduce external components and overall BOM.
• Extremely low-power operation – Multiple low-power modes and documented microamp-level sleep currents enable extended battery life in portable and remote devices.
• Flexible peripheral set – Multiple UART/USART, I2C and SPI ports plus DMA and timers make it simple to connect sensors, displays and communication modules while offloading the CPU.
• Compact industrial-capable package – 32‑pin LQFP with 26 I/Os and −40 °C to +105 °C rating supports compact designs for commercial and industrial environments.
• Fast wake-up and real-time support – 8 µs wakeup and integrated RTCC and watchdog support responsive, reliable embedded control and timekeeping.

Why Choose A31L123KN?

The A31L123KN positions itself as a balanced platform for embedded designs that require efficient processing, a broad set of on-chip peripherals and exceptional low-power behavior. Its ARM Cortex‑M0+ core, paired with 64 KB Flash, 8 KB SRAM and mixed-signal peripherals, makes it suitable for compact battery-powered products and industrial control nodes where integration and power budget are critical.

Designers benefit from a feature-rich MCU that simplifies system architecture—reducing external components—while delivering the low-power metrics, wake-up performance and peripheral flexibility needed across IoT, meter and portable device applications. The A31L123KN is an option for teams seeking a scalable, robust building block from the A31L12x family with industrial temperature range support.

Request a quote or submit an inquiry to Abov Semiconductor for pricing, lead times and sample availability for the A31L123KN.