AB18 Series 1.7 to 3.6V 32kHz SMT Crystal Mode Real Time Clock Module - QFN-16
实时时钟 RTC IC 时钟/日历 - I²C，2 线串口 16-VFQFN 裸露焊盘
得捷:
IC RTC CLK/CALENDAR I2C 16-QFN
安富利:
Real Time Clock RTC IC Clock/Calendar I²C, 2-Wire Serial 16VFQFN Exposed Pad
Chip1Stop:
Real Time Clock Serial 3-Wire, 4-Wire, SPI 16-Pin QFN EP T/R