BU9873 Datasheet, PDF (8/40 Pages) Rohm – I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment

BU9873
Datasheet
10
5
0
-5
-10
0
1
2
3
4
5
6
Supply Voltage V_DD [V]
Figure 11. Oscillation Frequency Deviation vs. Supply
Voltage
(V_DD=3V, Topt=25°C as standard)
0
-20
-40
-60
-80
-100
-120
-140
-60 -40 -20 0 20 40 60 80 100
Ope ration Temperature Topt [Celsius]
Figure 12. Oscillation Frequency Deviation vs. Operating
Temperature
(V_DD=3V, Topt=25°C as standard)
0
-20
-40
F_osc vs. C_Gout (C_Dout=0)
F_osc vs. C_Dout (C_Gout=0)
-60
0
5
10
15
20
External Capa citance [p F]
Figure 13. Oscillation Frequency Deviation vs. External C_G
and C_D
(V_DD=3V, Topt=25°C as standard)
500
400
300
200
100
0
0
1
2
3
4
5
6
Supply Voltage V_DD [V]
Figure 14. Oscillation Start Time vs. Supply Voltage
(Topt=25°C)
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13.Sep.2013 REV.001