Rainbow Electronics DS1682 User Manual
Ds1682, Total elapsed time recorder with alarm, Features
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041202
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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
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 power-supply range (2.5V to 5.5V)
§ Useful in time-of-use warranty, calibration,
repair, and maintenance applications
PIN ASSIGNMENT
Package dimension information can be found at:
PIN DESCRIPTION
EVENT
- Event Input
ALARM
- Alarm Output
GND
- Ground
SDA
- Serial- Data I/O
SCL
- Serial-Clock Input
V
CC
- Voltage Supply
N/C
- No Connect
ORDERING INFORMATION
DS1682S 8-Pin SO (150mil) -40°C to +85°C
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.
SDA
1
SCL
EVENT
6
3
2
GND
V
CC
8
4
5
7
N/C
N/C
ALARM
Top View
DS1682S 8-Pin SO (150mil)
DS1682
DS1682
Total Elapsed Time Recorder
with Alarm
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