Data Sheet

SD2405ALPI IIC 串行接口的实时时钟IC
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3. block diagram
4.Pin Configuration
DIP-16（300mil）
Pin Number
Nam
e
Function
Typical
1、5、6、7、16
NC
No connection
No connection or GND
connection
2
T E S T
Testing pin for Voltage of Inner battery, output via
100k resistor
No connection(only use
for testing)
8
G N D
Ground
9
SDA
Serial Data Input/Output. This pin is the data
input/output for the I2C serial interface. This
open-drain pin requires an external pull-up
resistor.
Open-N-channel output,
cmos input. When
backup power source is
used, the function of this
pin is disabled.
10
S C L
Serial Clock Input. This pin is the clock input for
the I2C serial interface and is used to
synchronize data movement on the serial
interface.
cmos input. When
backup power source is
used, the function of this
pin is disabled.