Rainbow Electronics DS1678 - Manual

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FEATURES
§ Real-time clock (RTC)/calendar in binary-
coded decimal (BCD) format counts seconds,
minutes, hours, date, month, day of the week,
and year with leap-year compensation and is
year 2000-compliant
§ Logs up to 1025 consecutive events in read-
only nonvolatile (NV) memory
§ The event trigger is user-programmable and
can be triggered by the falling edge, rising
edge, or rising and falling edges of the
INT pin
§ Event count register provides data on the
number of events that have been logged in the
current event logging mission
§ Programmable real-time clock alarm
§ 32-byte, battery-backed, NV RAM for data
storage
§ Two-wire serial interface allows for a simple
connection to your system
§ Three resolution options are available to trade
off accuracy versus maximum time between
events
§ Underwriters Laboratory (UL) recognized
PIN ASSIGNMENT
Package dimension information can be found at:
http://www.maxim-ic.com/TechSupport/PackInfo.htm
PIN DESCRIPTION
V
BAT
- Battery Supply
X1 - Crystal Input
X2 - Crystal Output
INT - Interrupt Input/Output
GND - Ground
SDA - 2-wire Input/Output
SCL - 2-wire Clock Input
V
CC
- +5V Supply
ORDERING INFORMATION
DS1678 8-Pin DIP (300-mil)
DS1678S 8-Pin SOIC (208-mil)
DS1678
Real-Time Event Recorder
www.maxim-ic.com
8-Pin SOIC (208-mil)
1
2
3
4 5
6
7
8
V
BAT
Vcc
GND
INT
SCL
SDA X2
X1
8-Pin DIP (300-mil)
TYPICAL OPERATING CIRCUIT