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DS17885

Dallas
Part Number DS17885
Manufacturer Dallas
Description (DS17886 / DS17887) 3V/5V Real-Time Clock
Published Aug 15, 2005
Detailed Description DS17885/DS17887 3V/5V Real-Time Clock www.maxim-ic.com FEATURES Incorporates industry standard DS1287 PC clock plus enh...
Datasheet PDF File DS17885 PDF File

DS17885
DS17885

Overview
DS17885/DS17887 3V/5V Real-Time Clock www.
maxim-ic.
com FEATURES Incorporates industry standard DS1287 PC clock plus enhanced features: § Y2K compliant § +3V or +5V operation § SMI recovery stack § 64-bit silicon serial number § Power-control circuitry supports system power-on from date/time alarm or key closure § 32kHz output on power-up § Crystal select bit allows RTC to operate with 6pF or 12.
5pF crystal § 114 bytes user NV RAM § Auxiliary battery input § 8kB additional NV RAM § RAM clear input § Century register § Date alarm register § Compatible with existing BIOS for original DS1287 functions § Available as chip (DS17885) or standalone module with embedded battery and crystal (DS17887) § Timekeeping algorithm includes leap-year compensation valid up to 2100 § Underwriters Laboratory (UL) recognized PIN ASSIGNMENT PWR X1 X2 AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC SQW VBAUX RCLR VBAT IRQ KS RD GND WR ALE CS DS17885 24...


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