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SM8577B Datasheet(PDF) 7 Page - Nippon Precision Circuits Inc

Part # SM8577B
Description  Real-time Clock IC
PDF  10 Pages
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8577B Datasheet(HTML) 7 Page - Nippon Precision Circuits Inc

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SM8577B
NIPPON PRECISION CIRCUITS—7
Timing Diagrams
Data read
Data write
FOUT output
Note that the 1 Hz and 32 kHz oscillators are not
synchronized to each other, so switching between 1
Hz and 32 kHz output temporarily shortens the duty
cycle. Accordingly, a wait time (
≥ output frequency
period) should be incorporated when switching
during normal operation.
CE
CLK
DATA
tCE
tCES
tCLKH
tCLK
tDATD
tCLKL
tr1
tf1
tDZ
tCEH
tRCV
CE
CLK
DATA
tCE
tCES
tCLKH
tCLK
tsD
tCLKL
tr1
tf1
tCEH tRCV
tHD
FOUT
tr2
tH
t
10%
50%
90%
Duty= X 100(%)
t
tH
tr2



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