【EPSON】RTC-4543SB:A,IC RTC SER +-12PPM 18-SOP
【EPSON】RTC-4543SB:B3 ROHS,IC REAL TIME CLOCK 18-SOP
【EPSON】RTC-4553A2,IC REAL TIME CLOCK 14-SOIC
RTC-4574JE:B ROHS,IC RTC CLK/CALENDAR SER 20VSOJ
【EPSON】RTC-4574JE:B3 ROHS,IC REAL TIME CLOCK 20-VSOJ
RTC-4574NB B 5+/-23PPM,
RTC-4574NB:B ROHS,IC RTC CLK/CALENDAR SER 22SON
【EPSON】RTC-4574NB:B3 ROHS,IC REAL TIME CLOCK 22-SON