MAX31341B nanoPower Real-Time Clock (RTC)

Analog Devices' MAX31341B nanoPower real-time clock extends battery life, reduces power consumption, and saves space in space-constrained systems such as wearables, medical monitors, point-of-sale (POS) equipment, and portable terminals. More than 35% smaller than the tiniest RTC alternatives available today, this nanoPower RTC, which operates at less than 180 nA, offloads the central microcontroller from timekeeping, allowing for greater energy savings during sleep cycles and extension of battery runtime.

Systems that use microcontrollers for accurate timekeeping often waste battery life, which is unacceptable in small battery-powered systems. The MAX31341B is designed with industry-leading power-management circuitry that remains on during dormant periods, providing timekeeping so that the microcontroller can shut down to preserve power and extend battery life. Available in an ultra-small wafer-level package measuring 2 mm x 1.5 mm, the RTC cuts the size by more than 35%, making it an ideal solution size for space-constrained applications.

Features

• Increases battery life
• 180 nA timekeeping current
• Sleep manager function with integrated power switch
• Wide range of external crystals with CL = 6 pF and ESR up to 100 kΩ for minimal current draw
• Trickle charger for external super-capacitor or rechargeable battery
• Provides flexible configurability
• Solar and lunar dual calendar systems
• A Schmitt trigger input to trigger interrupt
• One analog input with adjustable threshold to trigger interrupt
• Programmable square-wave output for clock monitoring
• Saves board space
• Integrated load capacitors for crystal oscillator
• 2 mm x 1.5 mm, 12-bump WLP with 0.5 mm pitch