RV5C339A_03 Datasheet, PDF (41/46 Pages) RICOH electronics devices division – 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION

7. Typical Characteristics
• Test Circuit
RV5C339A
VDD
OSCIN
32.768kHz
OSCOUT
32KOUT
VSS
Frequency
counter
RV5C339A
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)
(CE=Open, Output=Open, Topt=25˚C)
1
0.8
0.6
0.4
0.2
00
1
2
34
5
6
Supply Voltage VDD(V)
7.2 Timekeeping Current vs. Supply Voltage
(with 32-kHz clock output)
(CE=Open, Output=Open, Topt=25˚C)
3
2.5
2
1.5
1
0.5
00
1
2
34
5
6
Supply Voltage VDD(V)
7.3 CPU Access Current vs. SCLK Clock Frequency
(Output=Open, Topt=25˚C)
50
7.4 Timekeeping Current vs. Operating Temperature
(with no 32-kHz clock output)
(CE=Open, Output=Open)
2
40
1.5
30
VDD=5V
1
20
VDD=3V
0.5
10
0
0
500
1000 1500 2000
SCLK Clock Frequency (kHz)
0
–60 –40 –20 0 20 40 60 80 100
Operating Temperature Topt(˚C)
41