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R2045S Datasheet(PDF) 4 Page - RICOH electronics devices division

Part No. R2045S
Description  4-wire Serial Interface Real Time Clock Module
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Maker  RICOH [RICOH electronics devices division]
Homepage  http://www.ricoh.com
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R2045S Datasheet(HTML) 4 Page - RICOH electronics devices division

 
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R2045S/D
4
ABSOLUTE MAXIMUM RATINGS
(VSS=0V)
Symbol
Item
Pin Name and Condition
Description
Unit
VDD
Supply Voltage
VDD
-0.3 to +6.5
V
Input Voltage 1
CE, SCLK, SI
-0.3 to +6.5
VI
Input Voltage 2
VPP
-0.3 to VDD+0.3
V
Output Voltage 1
SO
-0.3 to VDD+0.3
VO
Output Voltage 2
INTR , 32KOUT
-0.3 to +6.5
V
PD
Power Dissipation
Topt=25
°C
300
mW
Topt
Operating
Temperature
-40 to +85
°C
Tstg
Storage Temperature
-55 to +125
°C
RECOMMENDED OPERATING CONDITION
(VSS=0V, Topt=-40 to +85
°C)
Symbol
Item
Pin Name and Condition
Min.
Typ.
Max
.
Unit
VACCESS
Supply Voltage
VDD power supply voltage
for interfacing with CPU
1.7
5.5
V
VCLK
Time Keeping Voltage
1.15
5.5
V
VPUP
Pull-up Voltage
INTR
5.5
V
FREQUENCY CHARACTERISTICS
(VSS=0V)
Symbol
Item
Condition
Min.
Typ.
Max.
Unit
∆f/f0
Frequency
Deviation
Topt=25
°C, VDD=3V
-5
0
+5
ppm
Fv
Frequency
Voltage
Characteristics
Topt=25
°C,
VDD=2.0V to 5.5V
-1
+1
ppm
Top
Frequency
Temperature
Characteristics
Topt=-20
°C to +70°C
25
°C as standard
-120
+10
ppm
tsta
Oscillation
Start-up Time
Topt=25
°C, VDD=2V
+1
sec
fa
Aging
Topt=25
°C, VDD=3V,
First year
-5
+5
ppm


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