A31L123CL

The A31L123CL is an ultra‑low‑power microcontroller based on the ARM Cortex‑M0+ core, integrating 64 Kbytes of internal flash and 8 Kbytes of SRAM. Designed for battery‑sensitive and embedded applications, it combines a compact 48‑LQFP package with a broad peripheral set for sensing, user interfaces and communication.

Targeted use cases include smart meters, smart card readers, building and home control, IoT devices, wireless sensor nodes and portable consumer and healthcare devices where low power, rich on‑chip integration and flexible I/O are required.

Key Features

• Core  ARM Cortex‑M0+ 32‑bit core with a 32 MHz operating frequency for deterministic embedded control.
• Memory  64 Kbytes internal flash and 8 Kbytes SRAM with 32‑byte backup register for application and state retention.
• Power  Wide supply range (1.65 V to 3.6 V) and ultra‑low current modes: 78 µA/MHz in run, 1.3 µA deep sleep with RTCC + retention, 0.6 µA deep sleep with power control, and 8 µs wakeup time.
• Timers & DMA  Five 16‑bit general purpose timers supporting periodic, one‑shot, PWM and capture modes plus a five‑channel DMA for offloading data transfers.
• Analog  12‑bit A/D converter (1 Msps) with 10 input channels and two on‑chip comparators, operable down to the low supply voltage of 1.65 V.
• Connectivity  Multiple serial interfaces including 2×I2C, 1×SPI, 1×USART, 2×UART and a smart card interface for host and peripheral communication.
• LCD & UI  On‑chip LCD driver (19×4) with contrast control to simplify low‑power user interfaces.
• System Reliability & Security  CRC unit (8/16/32‑bit), 128‑bit unique ID, watchdog timer, power on reset (POR), low voltage detect and reset (LVD/LVR), and clock monitoring functions.
• Clocking & Oscillators  Supports internal RC and external oscillators, plus a low‑power timer and real time clock/calendar (RTCC) for timekeeping in low‑power modes.
• Package & Temperature  Surface‑mount 48‑LQFP (7×7‑0.5) package with specified operating range of −40 °C to +105 °C.

Typical Applications

• Smart Meters  Metering control and data acquisition using integrated ADC, RTC and low‑power modes to extend battery or backup life.
• Smart Card Readers  Smart card interface and serial communications provide connectivity and secure peripheral control for payment and access systems.
• Home & Building Control  Sensor interfacing, user display control (LCD driver) and communication for locks, controllers and automation modules.
• IoT & Wireless Sensor Nodes  Low‑power operation, multiple comms interfaces and DMA simplify sensor sampling and network connectivity in constrained devices.
• Portable Consumer & Healthcare  Compact package, low supply voltage operation and ultra‑low deep sleep currents suit battery‑powered handheld devices.

Unique Advantages

• Highly integrated peripheral set: Combines ADC, comparators, timers, DMA, RTC, CRC and an LCD driver on‑chip to reduce BOM and PCB area.
• Low‑voltage, low‑power operation: Operates from 1.65 V to 3.6 V with deep sleep currents down to 0.6 µA and fast 8 µs wakeup for responsive, energy‑efficient designs.
• Flexible communications: Multiple UART/USART, I2C and SPI interfaces plus smart card support enable diverse peripheral and network connectivity.
• Compact package for space‑conscious designs: 48‑LQFP (7×7‑0.5) delivers 38 usable I/O pins in a small surface‑mount footprint.
• Embedded system robustness: Watchdog timer, POR, LVD/LVR and clock monitoring improve system reliability in the field.
• Developer convenience: SWD debug interface, CRC unit and unique ID support development, validation and traceability.

Why Choose A31L123CL?

The A31L123CL positions itself as a capable, ultra‑low‑power ARM Cortex‑M0+ MCU that balances processing capability with extensive on‑chip peripherals and low‑voltage operation. Its integrated ADC, display driver and multiple serial interfaces make it well suited to compact, battery‑sensitive embedded systems where minimizing external components is important.

This device is ideal for engineers building smart meters, access and payment readers, IoT sensors, consumer and portable healthcare products who need a proven microcontroller platform with low sleep currents, fast wakeup and a broad set of connectivity and system management features backed by ABOV Semiconductor.

For pricing, availability or to request a quote for A31L123CL, submit your inquiry and our team will respond with product and purchasing details.