DS1642 Datasheet, PDF (7/11 Pages) Dallas Semiconductor – Nonvolatile Timekeeping RAM

DS1642
WRITE CYCLE, AC CHARACTERISTICS
(0°C to 70°C; VCC = 5.0V ± 10%)
PARAMETER
SYMBOL
70 ns access 100 ns access
MIN MAX MIN MAX
UNITS
NOTES
Write Cycle Time
t_WC
70
100
ns
Address Setup Time
t_AS
0
0
ns
WE Pulse Width
t_WEW
50
70
ns
CE Pulse Width
t_CEW
60
75
ns
Data Setup Time
t_DS
30
40
ns
Data Hold Time
t_DH
0
0
ns
Address Hold Time
t_AH
5
5
ns
WE Data Off Time
t_WEZ
25
35
ns
Write Recovery Time
t_WR
5
5
ns
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