Analog Devices DS1683 Product Info

• Records the Total Time the EVENT Input Has Been Active High and Number of Events (Falling Edges of EVENT) That Have Occurred
• 32-Bit, Nonvolatile, Elapsed Time Counter (ETC) Monitors Event Duration with Quarter Seconds Resolution and Provides 34 Years of Total Time Accumulation
• Nonvolatile 16-Bit Event Counter Records the Number of Falling Edges Seen by the EVENT Pin
• Calibrated, Low-Temperature-Coefficient RC Time Base
• 16 Bytes of User EEPROM
• Password Protection Scheme (4 Bytes)
• I²C-Compatible Interface
• +2.5V to +5.5V Operating Voltage Range

The DS1683 is an integrated elapsed-time recorder containing a factory-calibrated, low-temperature-coefficient RC time base that eliminates the need for an external crystal. Using EEPROM technology to maintain data in the absence of power, the DS1683 requires no backup power source. The DS1683 detects and records the number of falling edge transitions on the EVENT pin as well as the total cumulative time that the EVENT pin is held high. The ALARM pin alerts the user when the total time accumulated equals or exceeds the user-programmed alarm value, or when the total number of events equals or exceeds the user-programmed alarm value. The polarity of the open-drain ALARM pin can be programmed to either drive low or become high impedance upon an alarm condition. The DS1683 is ideal for applications that monitor the total amount of time that a device has been in operation and/or the number of uses since inception service, repair, or last calibration.

Applications

• Any System Where Time-of-Use is Important to Track
• High-Temp, Rugged, Industrial Applications Where Vibration or Shock Could Damage a Quartz Crystal
• Power-on-Time Recorder