Alongside growing public awareness of the need to conserve energy, manufacturers have made rapid moves to ensure lower power consumption in electronic devices. This trend has sparked increased use of real-time clocks for retaining the current time in electronic devices in place of microcontrollers (which effectively internalize clock function), due to the ability of such clocks to retain the current time with extremely low power consumption.
Conventional real-time clocks use an external special-purpose power management IC to sustain operation of the clock in case the electronic device's main power supply is cut off. However, this can cause battery power loss, prompting calls for solutions toward lower power consumption and greater efficiency. To address these needs, Epson has developed the RX-4035SA/LC and RX-8035SA/LC real-time clock modules with built-in power source switching function, realizing extremely low leakage current and voltage drops, while maximizing battery power.