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DS1747-70+ Datasheet(PDF) 11 Page - Maxim Integrated Products

Part # DS1747-70+
Description  Y2K-Compliant, Nonvolatile Timekeeping RAMs
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS1747-70+ Datasheet(HTML) 11 Page - Maxim Integrated Products

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DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs
11 of 16
AC CHARACTERISTICS—WRITE CYCLE (5V)
(VCC = 5.0V 10%, TA = Over the Operating Range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Write Cycle Time
tWC
70
ns
Address Setup Time
tAS
0
ns
WE
Pulse Width
tWEW
50
ns
CE
Pulse Width
tCEW
60
ns
Data Setup Time
tDS
30
ns
Data Hold Time
tDH1
0
ns
8
Data Hold Time
tDH2
0
ns
9
Address Hold Time
tAH1
5
ns
8
Address Hold Time
tAH2
5
ns
9
WE
Data Off Time
tWEZ
25
ns
Write Recovery Time
tWR
5
ns
AC CHARACTERISTICS—WRITE CYCLE (3.3V)
(VCC = 3.3V 10%, TA = Over the Operating Range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Write Cycle Time
tWC
120
ns
Address Setup Time
tAS
0
120
ns
WE
Pulse Width
tWEW
100
ns
CE Pulse Width
tCEW
110
ns
CE
and CE2 Pulse Width
tCEW
110
ns
Data Setup Time
tDS
80
ns
Data Hold Time
tDH1
0
ns
8
Data Hold Time
tDH2
0
ns
9
Address Hold Time
tAH1
0
ns
8
Address Hold Time
tAH2
10
ns
9
WE
Data Off Time
tWEZ
40
ns
Write Recovery Time
tWR
10
ns


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