RX5C348A Datasheet, PDF (40/45 Pages) RICOH electronics devices division – 4-WIRE SERIAL INTERFACE

Rx5C348A/B
Typical Characteristics
Test circuit
VDD
OSCIN
OSCOUT
32KOUT
VSS
32768Hz
Frequency
Counter
X’tal : 32.768kHz
(R1=30kΩ typ)
(CL=6pF to 8pF)
Topt : 25°C
Output pins : Open
Timekeeping Current vs. Supply voltage
(with no 32-kHz clock output)
(CE=Open, Output=Open, Topt=25°C,Rx5C348A)
1
0.8
0.6
0.4
0.2
0
0123456
Supply Voltage VDD(v)
Timekeeping Current vs. Supply voltage
(with 32-kHz clock output)
(CE=Open, Output=Open,Topt=25°C)
2
1.5
Rx5C348A
1
0.5
Rx5C348B
0
0123456
Supply Voltage VDD(v)
CPU Access Current vs. SCLK Clock Frequency
(Output=Open, Topt=25°C)
50
40
30
VDD=5v _VDD=3v
20
10
0
0
500 1000 1500 2000
SCLK Clock Frequency (kHz)
Timekeeping Current vs. Operating Temperature
(with no 32-kHz clock output)
(CE=Open, Output=Open)
2
1.5
1
0.5
0
-60 -40 -20 0 20 40 60 80 100
Operating Temperature Topt(°C)
12345
Rev.2.01
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