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DS1743 Datasheet, PDF (11/16 Pages) Dallas Semiconductor – Y2KC Nonvolatile Timekeeping RAM
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DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs
AC CHARACTERISTICS—WRITE CYCLE (5V)
(VCC = 5.0V ±10%, TA = Over the Operating Range.)
ACCESS
PARAMETER
SYMBOL
70ns
85ns
MIN MAX MIN MAX
Write Cycle Time
tWC
70
85
Address Setup Time
tAS
0
0
WE Pulse Width
tWEW
50
65
CE Pulse Width
tCEW
60
70
CE2 Pulse Width
tCE2W
65
75
Data Setup Time
tDS
30
35
Data Hold Time CE
tDH
0
0
Data Hold Time CE2
tDH
8
8
Address Hold Time
WE Data-Off Time
tAH
5
5
tWEZ
25
30
Write Recovery Time
tWR
10
10
100ns
MIN MAX
100
0
70
75
85
40
0
8
5
35
10
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
5
5
5
5
5
5
5
AC CHARACTERISTICS—WRITE CYCLE (3.3V)
(VCC = 3.3V ±10%, TA = Over the Operating Range.)
ACCESS
PARAMETER
SYMBOL
120ns
150ns
MIN MAX MIN MAX
Write Cycle Time
tWC
120
150
Address Setup Time
WE Pulse Width
CE and CE2 Pulse Width
tAS
0
0
tWEW
100
130
tCEW
110
140
Data Setup Time
Data Hold Time CE
tDS
80
90
tDH
0
0
Data Hold Time CE2
tDH
10
10
Address Hold Time
WE Data-Off Time
tAH
0
0
tWEZ
40
50
Write Recovery Time
tWR
10
10
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
5
5
5
5
5
5
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