PIN

NAME

FUNCTION

1

EVENT

Event Input. The EVENT pin is the input the DS1682 monitors to determine when an event occurs. When

the pin is pulled high, the contents of the EEPROM are transferred to the ETC and the oscillator starts.

The ETC begins to count in quarter-second increments. When the EVENT pin falls to logic 0, the event

counter increments, and the event counter, ETC, and user-memory data are stored in the EEPROM array.

event.

2, 7

N.C.

No Connection. These pins are not connected internally.

3

ALARM

Active-Low Alarm Output. The DS1682 monitors the values in the ETC for the programmed value in

the alarm register. When the ETC matches the alarm value, the alarm flag (AF) is set. Once set, the

alarm flag cannot be reset. See the operating descriptions for the AOS and AP bits for details about the

operation of the ALARM pin.

4

GND

Ground

5

SCL

2-Wire Serial-Clock Input. The SCL pin is the serial-clock input for the 2-wire synchronous

communications channel. The SCL pin is an input that requires an external pullup resistor.

6

SDA

2-Wire Input/Output. The SDA pin is the data input/output signal for the 2-wire synchronous

communications channel. The SDA pin is an open-drain I/O, which requires an external pullup resistor.

8

+2.5V to +5.5V Input Supply

EVENT

+

N.C.

ALARM

1

2

3

4

8

7

6

5

GND

N.C.

SDA

SCL

SO

(150 mils)

TOP VIEW

DS1682

DS1682

Total-Elapsed-Time Recorder

with Alarm

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Maxim Integrated │ 5

Pin Description

Pin Configuration