The ABRACON AB08X5 Real-Time Clock family provides a
groundbreaking combination of ultra-low power coupled with a
highly sophisticated feature set.The AB08X5 includes on-chip
oscillators to provide minimum power consumption, full RTC
functions including battery backup and programmable counters
and alarms for timer and watchdog functions, and either an I2C or
SPI serial interface for communication with a host controller.

Ultra-low supply current (all at 3V)
Advanced timekeeping features
Baseline timekeeping features
Power management features

Smart Cards
Medical Electronics
Wireless Sensors and Tags
Utility meters
Data loggers
Appliances
Consumer electronics
Handsets
Communications equipment

Crystals 3x3mm Ultra Low Power Real Time Clock