RS5C348A RICOH Co.,Ltd., RS5C348A Datasheet - Page 40

• Manufacturer Part Number: RS5C348A
• Description: 4-wire Serial Interface Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

Rx5C348A/B
Rev.2.01
Test circuit
Timekeeping Current vs. Supply voltage
(with no 32-kHz clock output)
(CE=Open, Output=Open, Topt=25 ° C,Rx5C348A)
CPU Access Current vs. SCLK Clock Frequency
(Output=Open, Topt=25 ° C)
Typical Characteristics
OSCOUT
12345
32KOUT
OSCIN
0.8
0.6
0.4
0.2
50
40
30
20
10
0
VDD
VSS
1
0
0
0
SCLK Clock Frequency (kHz)
1
500
Supply Voltage VDD(v)
VDD=5v
32768Hz
2
1000
3
1500
4
VDD=3v
5
2000
Frequency
6
Counter
(CE=Open, Output=Open)
(with no 32-kHz clock output)
Timekeeping Current vs. Operating Temperature
(CE=Open, Output=Open,Topt=25 ° C)
Timekeeping Current vs. Supply voltage
(with 32-kHz clock output)
- 40 -
1.5
0.5
1.5
0.5
X’tal : 32.768kHz
Topt : 25 ° C
Output pins : Open
2
1
0
2
1
0
-60 -40 -20 0
0
Operating Temperature Topt( ° C)
(R1=30k Ω typ)
(CL=6pF to 8pF)
1
Supply Voltage VDD(v)
2
Rx5C348A
20 40 60 80 100
3
4
Rx5C348B
5
6