DS1689S+,IC RTC SER W/NV RAM CTRL 28-SOIC
DS1689S+T&R,IC RTC CLK/CALENDAR PAR 28SOIC
DS1689S+T&R,IC RTC SER W/NV RAM CTRL 28-SOIC
DS1689S+T&R-W,实时时钟
DS1689S+W,实时时钟
DS1689SN,IC RTC SER NV RAM CTRL IN 28SOIC
DS1689SN/T&R,IC RTC CLK/CALENDAR PAR 28SOIC
DS1689SN/T&R,实时时钟
