DS1744W-120IND,IC RTC RAM Y2K 3.3V 120NS 28EDIP
DS1744W-120IND+,IC RTC RAM Y2K 3.3V 120NS 28EDIP
DS1744WP-120,IC RTC RAM Y2K 3.3V 120NS 34-PCM
DS1744WP-120+,IC RTC RAM Y2K 3.3V 120NS 34-PCM
DS1744WP-120IND,实时时钟
DS1744WP-120IND+,IC RTC RAM Y2K 3.3V 120NS 34-PCM
DS1746-70,IC RTC RAM Y2K 5V 70NS 32-EDIP
DS1746-70+,IC RTC RAM Y2K 5V 70NS 32-EDIP