KEY TO SWITCHING WAVEFORMS
WAVEFORM
INPUTS
OUTPUTS
Steady
Changing from H to L
Changing from L to H
Don’t Care, Any Change Permitted
Does Not Apply
Changing, State Unknown
Center Line is High Impedance State (High Z)
SWITCHING WAVEFORMS
Device and
Address Selection
Data
Valid
Outputs
Enabled
Power-up, Standby
Addresses
Standby, Power-Down
Addresses Stable
t
(t
)
AVAV RC
CE# (E#)
OE# (G#)
t
(t
EHQZ
)
DF
t
t
WHGL
GHQZ
(t
)
DF
WE# (W#)
t
(t
)
GLQV OE
t
(t
)
ELQV CE
t
(t
)
AXQX OH
t
(t
)
GLQX OLZ
t
VCS
t
(t
)
)
ELQX LZ
High Z
High Z
Output Valid
Data (DQ)
t
(t
AVQV ACC
5.0 V
V
CC
0 V
11560G-16
Figure 7. AC Waveforms for Read Operations
28
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