DS1742-70,IC RTC RAM Y2K 5V 70NS 24-EDIP
DS1742-70+,IC RTC RAM Y2K 5V 70NS 24-EDIP
DS1742-85+,IC RTC RAM Y2K 5V 85NS 24-EDIP
DS1742W-120,IC RTC RAM Y2K 3.3V 120NS 24EDIP
DS1742W-120+,IC RTC RAM Y2K 3.3V 120NS 24EDIP
DS1742W-150,实时时钟
DS1742W-150+,IC RTC RAM Y2K 3.3V 150NS 24EDIP
DS1743-100,实时时钟