DS1307 64 x 8 Serial RTC (Real Time Clock) by Maxim. Package: 8-DIP Real-time clock (RTC) counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100 Download Maxim DS1307 datasheet: Status: NOS (New Old Stock) RoHS Compliant : tbc