pj8563s/p/t/m
输入电压1.0v-5.5v,400khz i2c总线接口.
兼容philips pcf8563
sop8/dip8/tssop8/
msop8
jt1302s/p
输入电压2.0v-5.5v, 3线接口.
兼容dallas ds1302
sop8/dip8
pj1307s/p
64x8串行i2c接口实时时钟/日历ic.
兼容dallas ds1307