DS1744P-70 查看數據表（PDF） - Unspecified
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DS1744P-70 Datasheet PDF : 19 Pages
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DS1744/DS1744P
Y2K-Compliant, Nonvolatile Timekeeping RAMs
AC CHARACTERISTICS-WRITE CYCLE (5V)
(Vcc=5.0V ±10%, TA=Over the operating range.)
PARAMETER
SYMBOL
MIN
Write Cycle Time
tWC
70
Address Setup Time
Pulse Width
Pulse Width
Data Setup Time
Data Hold Time
Data Hold Time
Address Hold Time
Address Hold Time
Data Off Time
tAS
0
tWEW
50
tCEW
60
tDS
30
tDH1
0
tDH2
0
tAH1
5
tAH2
5
tWEZ
Write Recovery Time
tWR
5
AC CHARACTERISTICS – WRITE CYCLE (3.3V)
(Vcc=3.3V ±10%, TA=Over the operating range.)
PARAMETER
SYMBOL
MIN
Write Cycle Time
tWC
120
Address Setup Time
tAS
0
Pulse Width
tWEW
100
Pulse Width
tCEW
110
and CE2 Pulse Width
tCEW
110
Data Setup Time
tDS
80
Data Hold Time
tDH1
0
Data Hold Time
tDH2
0
Address Hold Time
tAH1
0
Address Hold Time
tAH2
10
Data Off Time
tWEZ
Write Recovery Time
tWR
10
TYP
MAX
25
TYP
MAX
120
40
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
8
9
8
9
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
8
9
8
9
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