R2051 Datasheet, PDF (7/58 Pages) RICOH electronics devices division – 2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function

R2051 Series
• R2051K02, R2051S02
(Unless otherwise specified: VSS=0V,VCC=3.3V, VSB=3.0V, 0.1uF between VDD and VSS, CIN and VSS,
Topt=-40 to +85°C)
Symbol
Item
VIH
“H” Input Voltage
VIL
“L” Input Voltage
IOH
“H” Output
Current
IOL1
“L” Output
IOL2
Current
IOL4
IOL3
IIL
Input Leakage
Current
IOZ1
Output Off-state
Current 1
Pin Name
SCL,SDA
Conditions
CLKOUT
CLKOUT
INTR
SDA
VDCC
SCL
SDA
VOH=VCC-0.5V
VOL=0.4V
VDD,VSB,VCC=2.0V
VOL=0.4V
VI=5.5V or VSS
VO=5.5V or VSS
Min.
0.8x
VCC
-0.3
0.5
2.0
3.0
0.5
-1.0
-1.0
Typ. Max.
5.5
0.2x
VCC
-0.5
1.0
1.0
IOZ2
ISB
ISBL
VDETH
VDETL
-VDET1
+VDET1
∆VDET
∆Topt
VDDOUT1
VDDOUT2
CG
CD
Output Off-state
INTR ,
VO=5.5V or VSS
-1.0
1.0
Current 2
VDCC
Time Keeping Current VSB
VCC=0V, VSB=3.0V,
0.4
1.0
at Backup mode
VDD, Output=OPEN
Time keeping
Leakage Current of
VSB
VCC=3.3V,
-1.00
1.00
Backup pin at
VSB=5.5V or 0V,
VCC_on
VDD, Output=OPEN
Supply Voltage
VDD
Topt=+25°C
1.90 2.10 2.30
Monitoring Voltage
“H”
Supply Voltage
VDD
Topt=+25°C
1.20 1.35 1.50
Monitoring Voltage “L”
Detector Threshold
VCC
Topt=+25°C
2.73 2.80 2.87
Voltage
(falling edge of VCC)
Detector Released
VCC
Topt=+25°C
2.85 2.94 3.03
Voltage (rising edge
of VCC)
Detector Threshold
VCC,
Topt=-40 to +85°C
±100
and Released Voltage VSB
*1)
Temperature
coefficient
VDD Output
VDD
Topt=+25°C, VCC=3.3V, VCC
VCC
Voltage 1
Iout=1.0mA
-0.12 -0.04
VDD Output
Voltage 2
VDD
Topt=+25°C, VCC=2.0V, VSB
VSB=3.3V, Iout=0.1mA -0.08
VSB
-0.02
Internal Oscillation
OSCIN
10
Capacitance 1
Internal Oscillation
OSCOUT
10
Capacitance 2
*1) Guaranteed by design.
Unit
V
mA
mA
µA
µA
µA
µA
µA
V
V
V
V
ppm
/°C
V
V
pF
7