DS1643 Datasheet, PDF (8/17 Pages) Dallas Semiconductor – Nonvolatile Timekeeping RAM

DS1643/DS1643P
AC CHARACTERISTICS—READ CYCLE
(V_CC = 5.0V 10%, T_A = 0C to +70C.)
PARAMETER
70ns
SYMBOL ACCESS
MIN MAX
Read Cycle Time
t_RC
70
Address Access Time
t_AA
70
CE and CE2 to DQ Low-Z
t_CEL
5
CE Access Time
t_CEA
70
CE2 Access Time
t_CE2A
80
CE and CE2 Data Off Time
t_CEZ
25
OE to DQ Low-Z
t_OEL
5
OE Access Time
t_OEA
35
OE Data Off Time
t_OEZ
25
Output Hold from Address
t_OH
5
100ns
ACCESS
MIN MAX
100
100
5
100
105
35
5
55
35
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
4
4
4
4
4
4
4
4
4
4
READ CYCLE TIMING DIAGRAM
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