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R2023K Datasheet(PDF) 32 Page - RICOH electronics devices division

Part # R2023K
Description  2-wire Serial Interface Real Time Clock IC
PDF  50 Pages
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

R2023K Datasheet(HTML) 32 Page - RICOH electronics devices division

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R2023K/T
32
However, if adding CGOUT and/or CDOUT, Time keeping Voltage and Current will be worse, and it will be hard to
oscillate.
For reference, the data of Time keeping voltage and current when adding CGOUT=CDOUT=5pF are
shown in the table below.
(Topt=-40 to 85
°C, VSS=0v)
PIN
Item
Condition
Min.
TYP.
MAX.
UNITS
Vclk
Time Keeping
Voltage
CGout=CDout=5pF
1.15
5.5
V
IDD
Time Keeping
Current
VDD=3V,
SCL, SDA, CLKC=0V
32KOUT=OPEN
OUTPUT=OPEN
CGout=CDout=0pF
0.55
1.20
µA
Course (D)
It is necessary to select the crystal oscillator in the same manner as in Course (C) as well as correct errors in the
time count of each RTC in the same manner as in Course (B) by the method described in " P.33
• Oscillation
Adjustment Circuit ".



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