DS1682_13 Datasheet, PDF (1/14 Pages) Dallas Semiconductor – Total-Elapsed-Time Recorder with Alarm

www.maxim-ic.com
GENERAL DESCRIPTION
The DS1682 is an integrated elapsed-time recorder
containing a factory-calibrated, temperature-
compensated RC time base that eliminates the need
for an external crystal. Using EEPROM technology
to maintain data in the absence of power, the DS1682
requires no backup power source. The DS1682
detects and records the number of events on the
EVENT pin and the total cumulative event time since
the DS1682 was last reset to 0. The ALARM pin
alerts the user when the total time accumulated
equals the user-programmed alarm value. The
polarity of the open-drain ALARM pin can be
programmed to either drive low or to become high
impedance upon an alarm condition. The DS1682 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 of service, repair, or
the last calibration.
APPLICATIONS
High-Temp, Rugged, Industrial Applications Where
Vibration or Shock Could Damage a Quartz
Crystal
Any System Where Time-of-Use is Important
(Warranty Tracking)
ORDERING INFORMATION
PART*
DS1682S
DS1682S+
DS1682S/T&R
DS1682S+T&R
PIN-PACKAGE
8 SO
8 SO
8 SO (Tape and Reel)
8 SO (Tape and Reel)
TOP
MARK†
DS1682
DS1682
DS1682
DS1682
* All devices are specified over the -40°C to +85°C operating
range.
† A “‘+” anywhere on the top mark denotes a lead(Pb)-free device.
+ Denotes a lead(Pb)-free/RoHS-compliant device.
DS1682
Total-Elapsed-Time Recorder
with Alarm
FEATURES
 Records the Total Time that the Event Input has
Been Active and the Number of Events that have
Occurred
 32-Bit, Nonvolatile, Elapsed Time Counter
(ETC) Monitors Event Duration with Quarter-
Second Resolution and Provides 34 Years of
Total Time Accumulation
 Programmable Elapsed Time ALARM Output
 Nonvolatile 17-Bit Event Counter Records the
Total Number of Times an Event has Occurred
 Calibrated, Temperature-Compensated RC Time
Base Accurate to 2% Typical
 10 Bytes of EEPROM User Memory
 Write Disable Function to Prevent the Memory
from Being Changed or Erased
 2-Wire Serial Communication
 Wide 2.5V to 5.5V Power-Supply Range
 Useful in Time-of-Use Warranty, Calibration,
Repair, and Maintenance Applications
PIN CONFIGURATION
TOP VIEW
EVENT 1
8 V_CC
DS1682
N.C. 2
7 N.C.
ALARM ³
6 SDA
GND 4
5 SCL
SO
(150 mils)
1 of 14
REV: 081005