DS1678S Maxim Integrated Products, DS1678S Datasheet - Page 4

• Manufacturer Part Number: DS1678S
• Description: IC RECORDER REALTIME EVENT 8SOIC
• Manufacturer: Maxim Integrated Products
• Type: Time Event Recorderr

Specifications of DS1678S

• Memory Size: 32B
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DS1678 BLOCK DIAGRAM Figure 1
SIGNAL DESCRIPTIONS
The following paragraphs describe the function of each pin.
V
connected to a +5V supply.
V
the exception of the serial interface circuitry are powered by V
powered by V
connected directly to ground. UL recognized to ensure against reverse charging current when used in
conjunction with a lithium battery.
See “Conditions of Acceptability” at http://www.maxim-ic.com/TechSupport/QA/ntrl.htm.
GND – Ground.
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 open drain input, which requires an external pull-up resistor.
SDA (2-Wire Input/Output) – The SDA pin is the data input/output (I/O) signal for the 2-wire
synchronous communications channel. The SDA pin is an open drain I/O, which requires an external
pull-up resistor.
CC
BAT
– V
– Battery input for standard lithium cell or other energy source. All functions of the DS1678 with
CC
is a +5V input supply. Communication with the DS1678 can take place only when V
CC
SCL
SDA
GND
INT
V
V
BAT
CC
when V
2-WIRE SERIAL
X2
AND DIVIDER
OSCILLATOR
INTERFACE
32.768 kHz
CONTROL
CONTROL
CC
POWER
LOGIC
> V
BAT
X1
. If a battery or other energy source is not used, V
REGISTER
ADDRESS
4 of 26
BAT
RAM PORT
DATA LOG
USER
RTC
RAM
when V
CC
< V
BAT
DATA LOG
NV SRAM
. All functions are
BAT
should be
CC
is