DS1643 Datasheet, PDF (9/17 Pages) Dallas Semiconductor – Nonvolatile Timekeeping RAM

DS1643/DS1643P
AC CHARACTERISTICS—WRITE CYCLE
(V_CC = 5.0V 10%, T_A = 0C to +70C.)
PARAMETER
70ns
SYMBOL ACCESS
MIN MAX
Write Cycle Time
t_WC
70
Address Setup Time
t_AS
0
WE Pulse Width
t_WEW
50
CE Pulse Width
t_CEW
60
CE2 Pulse Width
t_CE2W
65
Data Setup Time
t_DS
30
Data Hold Time
t_DH
0
Address Hold Time
t_AH
5
WE Data Off Time
t_WEZ
25
Write Recovery Time
t_WR
5
100ns
ACCESS
MIN MAX
100
0
70
75
85
40
0
5
35
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
4
4
4
4
4
4
4
4
4
4
9 of 17