Top

Real-Time Event Recorder

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.

Key Features

  • 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

Applications/Uses

Parametric specs for Timekeeping & Real-Time Clocks
Interface I2C
VSUPPLY (V) 5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 300
CL (pF) 12.5
Memory Type NV SRAM
Memory Size (Bytes) 32
Time of Day Alarms 1
Package/Pins PDIP/8
SOIC (W)/8
Budgetary
Price (See Notes)
$3.14 @1k
View More

Simplified Block Diagram

DS1678: Typical Operating Circuit DS1678: Typical Operating Circuit Zoom icon

Design & Development

Click any title below to view the detail page where available.

/en/design/design-tools/ee-sim.html?

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal

Parameters

Parametric specs for Timekeeping & Real-Time Clocks
Interface I2C
VSUPPLY (V) 5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 300
CL (pF) 12.5
Memory Type NV SRAM
Memory Size (Bytes) 32
Time of Day Alarms 1
Package/Pins PDIP/8
SOIC (W)/8
Budgetary
Price (See Notes)
$3.14 @1k

Key Features

  • 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

Applications/Uses

Description

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.

Simplified Block Diagram

DS1678: Typical Operating Circuit DS1678: Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal