DS1747WP-120IND+,IC RTC RAM Y2K 3.3V 120NS 34-PCM
DS1747WP-C01,实时时钟
DS1747WP-C03+,IC RAM NONVOL TIME KEEP 34PWRCAP
DS1747WP-C2,实时时钟
DS17485-3,IC RTC 3V 4K NV RAM 24-DIP
DS17485-3+,IC RTC 3V 4K NV RAM 24-DIP
DS17485-5,IC RTC 5V 4K NV RAM 24-DIP
DS17485-5+,IC RTC 5V 4K NV RAM 24-DIP