RV5C387A_03 Datasheet, PDF (44/49 Pages) RICOH electronics devices division – I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION

RV5C387A
7. Typical Characteristics
• Test Circuit
RV5C387A
VDD
OSCIN
32.768kHz
OSCOUT
32KOUT
VSS
Frequency
counter
X'tal : 32.768kHz
(R1=30kΩ TYP.)
(CL=6pF to 8pF)
Topt : 25˚C
Output Pins: open
7.1 Timekeeping Current vs. Supply Voltage
(with no 32-kHz clock output)
(SCL=SDA=“H”,
Output=Open, Topt=25˚C)
1
0.8
0.6
0.4
0.2
0
0
1
2
34
5
6
Supply Voltage VDD(V)
7.2 Timekeeping Current vs. Supply Voltage
(with 32-kHz clock output)
(SCL=SDA=“H”,
Output=Open, Topt=25˚C)
2
1.5
1
0.5
0
01
2
3
4
5
6
Supply Voltage VDD(V)
7.3 CPU Access Current vs. SCLK Clock Frequency
(Output=Open, Topt=25˚C)
20
7.4 Timekeeping Current vs. Operating Temperature
(with no 32-kHz clock output)
(Output=Open)
2
15
1.5
10
1
VDD=5V
VDD=3V
5
0.5
0
0 100 200 300 400 500
SCL Clock Frequency (kHz)
0
–60 –40 –20 0 20 40 60 80 100
Operating Temperature Topt(˚C)
44