DS1747_10 Datasheet, PDF (11/16 Pages) Maxim Integrated Products – Y2K-Compliant, Nonvolatile Timekeeping RAMs

DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs
AC CHARACTERISTICS—WRITE CYCLE (5V)
(V_CC = 5.0V 10%, T_A = Over the Operating Range.)
PARAMETER
SYMBOL MIN TYP
Write Cycle Time
t_WC
70
Address Setup Time
t_AS
0
WE Pulse Width
t_WEW
50
CE Pulse Width
t_CEW
60
Data Setup Time
t_DS
30
Data Hold Time
t_DH1
0
Data Hold Time
t_DH2
0
Address Hold Time
t_AH1
5
Address Hold Time
t_AH2
5
WE Data Off Time
t_WEZ
Write Recovery Time
t_WR
5
MAX
25
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
8
9
8
9
AC CHARACTERISTICS—WRITE CYCLE (3.3V)
(V_CC = 3.3V 10%, T_A = Over the Operating Range.)
PARAMETER
SYMBOL MIN TYP
Write Cycle Time
t_WC
120
Address Setup Time
t_AS
0
WE Pulse Width
t_WEW
100
CE Pulse Width
t_CEW
110
CE and CE2 Pulse Width
t_CEW
110
Data Setup Time
t_DS
80
Data Hold Time
t_DH1
0
Data Hold Time
t_DH2
0
Address Hold Time
t_AH1
0
Address Hold Time
t_AH2
10
WE Data Off Time
t_WEZ
Write Recovery Time
t_WR
10
MAX
120
40
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
8
9
8
9
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