Epson Q41454351000200 Applications Manual

RTC - 4543 SA/SBPage - 1 MQ252-0432-kHz Output Serial RTC ModuleRTC - 4543 SA/SB! Built-in crystal permits operation without requiring adjustment! Built-in time counters (seconds, minutes, hours) and calendar counters (days, days of the weekmonths, years)! Operating voltage range: 2.5 V to 5.5 V! Supply voltage detection voltage: 1.7 ±0.3 V! Low current consumption: 1.0 μA/2.0 V (Max.)! Automatic processing for leap years! Output selectable between 32.768 kHz/1 Hz1. OverviewThis module is a real-time clock with a serial interface and a built-in crystal oscillator. This moduleis also equipped with clock and calendar circuits, an automatic leap year compensation function,and a supply voltage detection function.In addition, this module has a 32.768 kHz/1 Hz selectable output function for hardware control thatis independent of the RTC circuit.This module is available in a compact SOP 14-pin package (RTC-4543SA) and a thin SOP 18-pinpackage (RTC-4543SB).2. Block diagramOSCFOUTI / OCONTROLLERSHIFT REGISTERCL KDATACEWR32.768 kHzDIVIDEROUTPUTCONTROLLERFOECONTROLCIRCUITFSELVOLTAGEDETECTCLOCK AND CALENDAR