
DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
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AC CHARACTERISTICS—READ CYCLE (3.3V)
(VCC = 3.3V ±10%, TA = Over the Operating Range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Read Cycle Time
tRC
120
ns
Address Access Time
tAA
120
ns
CE
to DQ Low-Z
tCEL
5
ns
CE
Access Time
tCEA
120
ns
CE
Data Off Time
tCEZ
40
ns
OE
to DQ Low-Z
tOEL
5
ns
OE
Access Time
tOEA
100
ns
OE
Data Off Time
tOEZ
35
ns
Output Hold from Address
tOH
5
ns
READ CYCLE TIMING DIAGRAM
t
RC
t
CEA
t
OEA
t
CEL
tOEL
t
OH
tOEZ
t
AA
VALID
DQ0-DQ7
OE
CE
A0-A16
t
CEZ
VALID