R2051 Description
R2051 SERIES 2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function NO.EA-104-070626 .. OUTLINE The R2051 is a CMOS real-time clock IC connected to the CPU by two signal lines, SCL and SDA, and configured to perform serial transmission of time and calendar data to the CPU. Further, battery backup switchover circuit and a voltage detector are incorporated.