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R2023K Datasheet(PDF) 4 Page - RICOH electronics devices division

Part No. R2023K
Description  2-wire Serial Interface Real Time Clock IC
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Maker  RICOH [RICOH electronics devices division]
Homepage  http://www.ricoh.com
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R2023K Datasheet(HTML) 4 Page - RICOH electronics devices division

 
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R2023K/T
4
ABSOLUTE MAXIMUM RATINGS
(VSS=0V)
Symbol
Item
Pin Name
Description
Unit
VDD
Supply Voltage
VDD
-0.3 to +6.5
V
VI
Input Voltage 1
SCL, SDA, CLKC
-0.3 to +6.5
V
Output Voltage 1
SDA, INTRA , INTRB
-0.3 to +6.5
VO
Output Voltage 2
32KOUT
-0.3 to VDD + 0.3
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 CONDITIONS
(VSS=0V, Topt=-40 to +85
°C)
Symbol
Item
Pin Name
Min,
Typ.
Max.
Unit
Vaccess
Supply Voltage
Power supply voltage
for interfacing
with CPU
1.7
*1)
5.5
V
VCLK
Time keeping Voltage
CGout,CDout=0pF
*1), *2)
1.00
5.50
VCLKL
Minimum Time keeping
Voltage
CGout,CDout=0pF
*1), *2)
0.66
1.00
V
fXT
Oscillation Frequency
32.768
kHz
VPUP
Pull-up Voltage
INTRA , INTRB ,
SCL, SDA
5.5
V
*1) CGout is connected between OSCIN and VSS, CDout is connected between OSCOUT and VSS.
R2023K/T incorporates the capacitors between OSCIN and VSS, between OSCOUT and VSS.
Then normally, CGout and CDout are not necessary.
For more detail, see “P.30
•Adjustment of oscillation
frequency”
*2) Crystal oscillator: CL=6-9pF, R1=50K


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