DS1486 Datasheet, PDF (10/17 Pages) Dallas Semiconductor – RAMified Watchdog Timekeeper

DS1486/DS1486P
AC ELECTRICAL CHARACTERISTICS
(0°C to 70°C; V_CC = 5.0V ± 10%)
DS1486-120 DS1486-150
PARAMETER
SYMBOL MIN MAX MIN MAX UNITS NOTES
Read Cycle Time
Address Access Time
CE Access Time
t_RC
120
150
ns
1
t_ACC
120
150
ns
t_CO
120
150
ns
OE Access Time
t_OE
100
120
ns
OE or CE to Output Active
t_COE
10
10
ns
Output High Z from Deselect
t_OD
40
50
ns
Output Hold from Address Change
t_OH
10
10
ns
Write Cycle Time
t_WC
120
150
ns
Write Pulse Width
t_WP
110
140
ns
3
Address Setup Time
t_AW
0
0
ns
Write Recovery Time
t_WR
10
15
ns
Output High Z from WE
t_ODW
40
50
ns
Output Active from WE
t_OEW
10
10
ns
4
Data Setup Time
Data Hold Time
INTA , INTB Pulse Width
t_DS
85
110
t_DH
10
15
t_IPW
3
3
ns
4
ns
4, 5
ms 11, 12
READ CYCLE (Note 1)
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