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SM8577BS 데이터시트(PDF) 5 Page - Nippon Precision Circuits Inc

부품명 SM8577BS
상세설명  Real-time Clock IC
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제조업체  NPC [Nippon Precision Circuits Inc]
홈페이지  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8577BS 데이터시트(HTML) 5 Page - Nippon Precision Circuits Inc

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SM8577B
NIPPON PRECISION CIRCUITS—5
AC Characteristics
VDD = 5 V ± 10%, VSS = 0 V, Ta = −40 to 85 °C, CL = 50 pF unless otherwise noted
VDD = 3 V ± 10%, VSS = 0 V, Ta = −40 to 85 °C, CL = 50 pF unless otherwise noted
P arameter
Symbol
Condition
Rating
Unit
min
m a x
min
CLK clock period
tCLK
0.75
7800
µs
CLK LOW-level pulsewidth
tCLKL
0.375
3900
µs
CLK HIGH-level pulsewidth
tCLKH
0.375
3900
µs
CE setup time
tCES
0.375
3900
µs
CE hold time
tCEH
0.375
µs
CE enable time
tCE
0.9
s
Write data setup time
tSD
0.1
µs
Write data hold time
tHD
0.1
µs
DATA output delay time
tDATD
0.2
µs
DATA output floating time
tDZ
See measurement circuit.
0.1
µs
Clock rise time
tr1
––
50
ns
Clock fall time
tf1
––
50
ns
FOUT rise time
tr2
CL = 30 pF
100
ns
FOUT fall time
tf2
CL = 30 pF
100
ns
FOUT duty cycle
Duty
CL = 30 pF, 32 kHz output
40
60
%
Wait time
tRCV
0.95
µs
P arameter
Symbol
Condition
Rating
Unit
min
m a x
min
CLK clock period
tCLK
1.5
7800
µs
CLK LOW-level pulsewidth
tCLKL
0.75
3900
µs
CLK HIGH-level pulsewidth
tCLKH
0.75
3900
µs
CE setup time
tCES
0.75
3900
µs
CE hold time
tCEH
0.75
µs
CE enable time
tCE
0.9
s
Write data setup time
tSD
0.2
µs
Write data hold time
tHD
0.1
µs
DATA output delay time
tDATD
0.4
µs
DATA output floating time
tDZ
See measurement circuit.
0.2
µs
Clock rise time
tr1
100
ns
Clock fall time
tf1
100
ns
FOUT rise time
tr2
CL = 30 pF
200
ns
FOUT fall time
tf2
CL = 30 pF
200
ns
FOUT duty cycle
Duty
CL = 30 pF, 32 kHz output
40
60
%
Wait time
tRCV
1.9
µs


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