SPI Real Time Clock, Real time clock, low profile crystal, integrated circuit - tatanh1983/conchodom GitHub Wiki
PCF2123 Series 5.5 V Surface Mount SPI Real Time Clock/Calendar - TSSOP-14
https://www.futureelectronics.com/p/semiconductors--real-time-clocks/pcf2123ts-1-118-nxp-5138870