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DS17885
DS17885 Description
3V/5V Real-Time Clock
DS17885 Vendor
Maxim
DS17885 Categories
DS17885 Features
Incorporates industry standard DS1287 PC clock plus enhanced features:
  • Y2K Compliant
  • +3 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
  • 8 kbytes 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
    • DS17885 Datasheet and Application Notes
    ParameterValue
    Special Functions
  • Standard
    • Time Format (hh = 1/100 sec)HH:MM:SS
    Date FormatYYYY-MM-DD
    Bus TypeMultiplexed
    Op. Temp Range-40° to +85°
    Op. Temp Range0° to +70°
    Supply Voltage (V)3
    Supply Voltage (V)5
    NV RAM (Bytes)8k
    Package24/PDIP.600
    Package24/SO.300
    Package28/TSOP
    Price @ 1k$7.20
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