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DS1678: Real-Time Event Recorder Data Sheet (Rev. 3)9/19/2006PDF366K
Overview
Features and Benefits
- Real-Time Clock/Calendar in Binary-Coded Decimal (BCD) Format Counts Seconds, Minutes, Hours, Date, Month, Day of the Week, and Year with Leap Year Compensation and is Year 2000 Compliant
- Logs Up to 1025 Consecutive Events in Read-Only Battery-Backed Memory
- User-Programmable Event Trigger can be Triggered by the Falling Edge, Rising Edge, or Rising and Falling Edges of the active-low INT Pin
- Event Counter Register Provides Data on the Number of Events that Have Been Logged in the Current Event-Logging Mission
- Programmable RTC Alarm
- 32-Byte, Battery-Backed, General-Purpose NV RAM
- I²C Serial Interface
- Three Resolution Options for Trade-Off Accuracy vs. Maximum Time Between Events
- -40°C to +85°C Industrial Temperature Range
Product Details
The DS1678 real-time clock (RTC) event recorder records the time and date of a nonperiodic, asynchronous event each time the active-low INT pin is activated. The device records the seconds, minutes, hours, date, day of the week, month, year, and century when the first event occurs, and starts the 16-bit elapsed time counter (ETC). Subsequent events trigger the recording of the ETC into the event-log memory. This allows for up to 1025 events to be logged. Events can be logged while the device is operating from either VCC or VBAT.
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Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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Oscillator Design Considerations for Low-Current Applications1/26/2011
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Selecting a Backup Source for Real-Time Clocks5/26/2006
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How to Use the DS1678 Real-Time Event Recorder11/16/2005
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Using the DS32kHz with Maxim Real-Time Clocks2/15/2002
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Design Considerations for Maxim Real-Time Clocks2/15/2002
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Crystal Considerations with Maxim Real-Time Clocks (RTCs)3/29/2001
Design Resources
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