Details DS12C887+ DS12C887A+ DS12C887A+ DS12C887+ DS12C887+ DS12C887+ DS12C887+ DS12C887A+ DS12C887A+ DS12C887A+ DS12C887A DS12C887+ DS12C887A DS12C887+ DS12C887A+ DS12C887+ DS12C887+ DS12C887A+ DS12C887+ DS12C887A+ Most Popular Timers or RTCs DS3231SN#T& R DS1307ZN+T& R DS3231SN#T& R PCF8563T/5, 518 DS3231SN# DS1339U-33+ PCF8523T/1, 118 DS3231MZ+TRL PCF85263ATL/AX PCF8563TS/5, 118 DS3231MZ+TRL MCP7940NT-I/SN DS3231M+TRL DS3231M+TRL DS1307Z+T& R DS3231SN# PCF8563T/F4, 118 DS1682S+ DS1339U-33+T& R DS1307ZN+T& R DS1307Z+ DS1302Z+T& R M41T62LC6F PCF8563TS/4, 118 M41T62Q6F PCF85063AT/AAZ DS1302ZN+T& R MCP7940N-I/SN DS1307Z+T& R DS1302Z+T& R Most Popular Part Numbers