Click here for production status of specific part numbers. DS1682 Total-Elapsed-Time Recorder with Alarm General Description Benefits and Features The DS1682 is an integrated elapsed-time recorder con- Records the Total Time That the Event Input Has taining a factory-calibrated, temperature-compensated Been Active and the Number of Events That Have RC time base that eliminates the need for an external Occurred crystal. Using EEPROM technology to maintain data in 32-Bit, Nonvolatile, Elapsed Time Counter (ETC) the absence of power, the DS1682 requires no backup Monitors Event Duration with Quarter-Second power source. The DS1682 detects and records the num- Resolution and Provides 34 Years of Total Time ber of events on the EVENT pin and the total cumulative Accumulation event time since the DS1682 was last reset to 0. The Programmable Elapsed Time ALARM Output ALARM pin alerts the user when the total time accu- Nonvolatile, 17-Bit Event Counter Records the Total mulated equals the user-programmed alarm value. The polarity of the open-drain ALARM pin can be programmed Number of Times an Event has Occurred to either drive low or to become high impedance upon an Calibrated, Temperature-Compensated RC Time alarm condition. The DS1682 is ideal for applications that Base Accurate to 2% Typical monitor the total amount of time that a device has been 10 Bytes of EEPROM User Memory in operation and/or the number of uses since inception of Write Disable Function to Prevent the Memory from service, repair, or the last calibration. Being Changed or Erased Applications 2-Wire Serial Communication High-Temp, Rugged, Industrial Applications Where Wide 2.5V to 5.5V Power-Supply Range Vibration or Shock Could Damage a Quartz Crystal Useful in Time-of-Use Warranty, Calibration, Repair, Any System Where Time-of-Use is Important and Maintenance Applications (Warranty Tracking) Ordering Information appears at end of data sheet. SCL SERIAL INTERFACE SDA USER, CONTROL, AND CONFIGURATION DS1682 REGISTERS OSCILLATOR ELAPSED TIME COUNTER (ETC) AND DIVIDER EEPROM ARRAY ALARM REGS V CC CONTROL AND LOGIC AND COMPARE LOGIC ALARM EVENT GLITCH FILTER EVENT COUNTER EVENT Figure 1. Block Diagram 19-6835 Rev 2 11/18DS1682 Total-Elapsed-Time Recorder with Alarm Absolute Maximum Ratings Voltage Range on Any Pin Relative to Ground ......-0.3V to +6V Lead Temperature (soldering, 10s) .................................+300C Operating Temperature Range ........................... -40C to +85C Soldering Temperature (reflow) .......................................+260C Storage Temperature Range ............................ -55C to +125C Maximum Junction Temperature .....................................+150C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Recommended DC Operating Conditions (T = -40C to +85C, unless otherwise noted.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Power-Supply Voltage V 2.5 5.5 V CC 0.3 x 0.5 x 0.7 x Input Trip Point V V ETP V V V CC CC CC 1% of Event Trip-Point Hysteresis V % HYS V CC DC Electrical Characteristics (V = 2.5V to 5.5V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Leakage I -1 +1 A LI V 0.8 V ALARM Output (I = 10mA) OL OL SDA Output (I = 4mA) V 0.8 V OL OL Active Supply Current I (Note 1) 120 300 A CCA (Event Active) V = 5.5V 6 15 Standby Current CC I A CCS (Event Active) (Note 1) V = 3.0V 2 4 CC EEPROM Write Current I (Note 1) 150 300 A EE Event Timing (V = 2.5V to 5.5V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Time Event Minimum t (Note 1) 10 35 70 ms G Time Event Start t (Note 1) 112 125 137 ms ES Time Event Increment t (Note 1) 237.5 250 262.5 ms EI Time Event Max t 34 Years EM Maxim Integrated 2 www.maximintegrated.com