【EPSON】RTC-72421A:ROHS,IC REAL TIME CLOCK 18-DIP
RTC72421B,
【EPSON】RTC-72421B,IC REAL TIME CLOCK 18-DIP
RTC-72421B: PURE SN,IC RTC CLK/CALENDAR PAR 18DIP
RTC-72421B: ROHS,IC RTC CLK/CALENDAR PAR 18DIP
【EPSON】RTC-72421B:ROHS,IC REAL TIME CLOCK 18-DIP
【EPSON】RTC-72423A,IC REAL TIME CLOCK 24-SOP
RTC-72423A +/-20PPM,