BU9873 Datasheet, PDF (5/40 Pages) Rohm – I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment

BU9873
Datasheet
DC Characteristics
Item
“H” Input Voltage
Symbol
V_IH
Pin Name
SCL, SDA
Spec
Unit
Min Typ Max
0.7V_DD － V_DD+0.3 V
Conditions
“L” Input Voltage
V_IL
SCL, SDA
-0.3
－ 0.3V_DD V
“H” Output Current
I_OH
32KOUT
－
－ -0.5 mA
V_OH=V_DD-0.5V
“L” Output Current
I_OL1
INTRB, 32KOUT
1
I_OL2
SDA
6
－
－ mA
－
－ mA
V_OL1=0.4V
V_OL2=0.4V
Input Leakage Current
I_ILK
SCL
-1
－
1
μA V_IN=5.5V or V_SS, V_DD=5.5V
Output Off State Leakage
Current
I_OZ
I_DD1
SDA, INTRB,
32KOUT
VDD
-1
－
1
μA
－
0.4 0.6 μA
Standby Current
(time keeping current)
I_DD2
VDD
－
－
1.0 μA
I_DD3
VDD
－
－ 1.35 μA
Internal Oscillation
Capacitance 1
C_G
OSCIN
－
10
－ pF
Internal Oscillation
Capacitance 2
C_D
OSCOUT
－
10
－ pF
Unless otherwise specified: Vss=0V, V_DD=3V, Topt=−40°C to +85°C, Oscillation frequency=32.768 kHz
(load capacitance C_L=6pF, equivalent series resistance R₁=20kΩ)
V_OUT=5.5V or V_SS,
V_DD=5.5V
V_DD=3V,
Topt=25°C,
SCL, SDA=3V,
C_GOUT=C_DOUT=0pF,
Output=Open^(Note1)
V_DD=3V,
Topt=-40°C to +85°C,
SCL, SDA=3V,
C_GOUT=C_DOUT=0pF,
Output=Open^(Note1)
V_DD=5.5V,
Topt=-40°C to +85°C,
SCL, SDA=5.5V,
C_GOUT=C_DOUT=0pF,
Output=Open^(Note1)
(Note 1) In this mode, 32KOUT is disabled and no clock is output from this pin.
For time keeping current when outputting 32-kHz pulse from 32KOUT pin (this pin without loading), please refer to “P.7 Typical Performance Curves”.
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13.Sep.2013 REV.001