Direct clock/calendar replacement for IBM® AT-compatible computers and other applications
Functionally compatible with the DS1285
- Closely matches MC146818A pin configuration
2.7-3.6V operation (bq3285L); 4.5-5.5V operation (bq3285E)
242 bytes of general nonvolatile storage
32.768kHz output for power management
System wake-up capability?alarm interrupt output active in battery-backup mode
Less than 0.5µA load under battery operation
Selectable Intel or Motorola bus timing
14 bytes for clock/calendar and control
BCD or binary format for clock and calendar data
Calendar in day of the week, day of the month, months, and years, with automatic leap-year adjustment
Time of day in seconds, minutes, and hours
- 12- or 24-hour format
- Optional daylight saving adjustment
Programmable square wave output
Three individually maskable interrupt event flags:
- Periodic rates from 122us to 500ms
- Time-of-day alarm once per second to once per day
- End-of-clock update cycle
24-pin plastic DIP, SOIC, or SSOP

BQ3285EP Parameters

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Keywords

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BQ3285EP Circuit	BQ3285EP Reference	BQ3285EP PDF	BQ3285EP RoHS