DS12885Q

www.maxim-ic.com DS12885/DS12885Q/DS12885T Real-Time Clock PIN ASSIGNMENT (Top View) DS12885, 24 DIP DS12885S, 24 SO 300mil www.maxim-ic.com FEATURES Drop- in replacement for IBM AT computer clock/calendar § Pin configuration closely matches MC146818B and DS1285 www.DataSheet4U.com § Counts seconds, minutes, hours, days, day of the week, date, month, and year with leapyear compensation valid up to 2100 § Binary or BCD representation of time, calendar, and alarm § 12-hour or 24-hour clock with AM and PM in 12-hour mode § Daylight Savings Time option § Selectable between Motorola and Intel bus timing § Multiplex bus for pin efficiency § Interfaced with software as 128 RAM locations § 14 bytes of clock and control registers § 114 bytes of general purpose RAM § Programmable square-wave output signal bus-compatible interrupt signals ( IRQ ) § Three interrupts are separately softwaremaskable and testable § Time-of-day alarm once/second to once/day § Periodic rates from 122µs to 500ms § End-of-clock update cycle § Optional 28-pin PLCC surface mount package or 32-pin TQFP § Optional industrial temperature range available § Underwriters Laboratory (UL) recognized § DS12885Q 28 PLCC DS12885T 32 TQFP Package Dimension Information http://www.maxim-ic.com/TechSupport/DallasPackInfo.htm Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales ch...