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R2051 Datasheet(PDF) 6 Page - RICOH electronics devices division

Part No. R2051
Description  2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

R2051 Datasheet(HTML) 6 Page - RICOH electronics devices division

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R2051 Series
6
DC ELECTRICAL CHARACTERISTICS
R2051K01, R2051S01, R2051T01
(Unless otherwise specified: VSS=0V,VCC=VSB=3.0V, 0.1uF between VDD and VSS, CIN and VSS,
Topt=-40 to +85
°C)
Symbol
Item
Pin Name
Conditions
Min.
Typ.
Max.
Unit
VIH
“H” Input Voltage
0.8x
VCC
5.5
VIL
“L” Input Voltage
SCL,SDA
-0.3
0.2x
VCC
V
IOH
“H” Output
Current
CLKOUT
VOH=VCC-0.5V
-0.5
mA
IOL1
CLKOUT
0.5
IOL2 *2)
INTR
2.0
IOL4
SDA
VOL=0.4V
3.0
IOL3 *2)
“L” Output
Current
VDCC
VDD,VSB,VCC=2.0V
VOL=0.4V
0.5
mA
IIL
Input Leakage
Current
SCL
VI=5.5V or VSS
-1.0
1.0
µA
IOZ1
Output Off-state
Current 1
SDA
VO=5.5V or VSS
-1.0
1.0
µA
IOZ2 *2)
Output Off-state
Current 2
INTR ,
VDCC
VO=5.5V or VSS
-1.0
1.0
µA
ISB
Time Keeping Current
at Backup mode
VSB
VCC=0V, VSB=3.0V,
VDD, Output=OPEN
Time keeping
0.4
1.0
µA
ISBL
Leakage Current of
Backup pin at
VCC_on
VSB
VCC=3.0V,
VSB=5.5V or 0V,
VDD, Output=OPEN
-1.00
1.00
µA
VDETH
Supply Voltage
Monitoring Voltage
“H”
VDD
Topt=+25
°C
1.90
2.10
2.30
V
VDETL
Supply Voltage
Monitoring Voltage “L”
VDD
Topt=+25
°C
1.20
1.35
1.50
V
-VDET1
Detector Threshold
Voltage
(falling edge of VCC)
VCC
Topt=+25
°C
2.34
2.40
2.46
V
+VDET1
Detector Released
Voltage (rising edge
of VCC)
VCC
Topt=+25
°C
2.44
2.52
2.60
V
∆VDET
∆Topt
Detector Threshold
and Released Voltage
Temperature
coefficient
VCC,
VSB
Topt=-40 to +85
°C
*1)
±100
ppm
/
°C
VDDOUT1
VDD Output
Voltage 1
VDD
Topt=+25
°C, VCC=3.0V,
Iout=1.0mA
VCC
-0.12
VCC
-0.04
V
VDDOUT2
VDD Output
Voltage 2
VDD
Topt=+25
°C, VCC=2.0V,
VSB=3.0V, Iout=0.1mA
VSB
-0.08
VSB
-0.02
V
CG
Internal Oscillation
Capacitance 1
OSCIN
10
CD
Internal Oscillation
Capacitance 2
OSCOUT
10
pF
*1) Guaranteed by design.
*2) Except R2051T01


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