P4C1024 Ver la hoja de datos (PDF) - Performance Semiconductor
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P4C1024 Datasheet PDF : 8 Pages
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P4C1024
AC CHARACTERISTICS - WRITE CYCLE
(Over Recommended Operating Temperature & Supply Voltage)
Symbol
Parameter
-15
-17
-20
-25
-35
-45
Unit
Min Max Min Max Min Max Min Max Min Max Min Max
tWC
Write Cycle Time 15
17
20
25
35
45
ns
t
Chip Enable Time 12
13
15
18
22
30
ns
CW
to End of Write
tAW
Address Valid to 12
13
15
20
25
35
ns
End of Write
tAS
Address Set-up
0
0
0
0
0
0
ns
Time
tWP
Write Pulse Width 12
12
15
18
22
25
ns
t
AH
Address Hold Time 0
0
0
0
0
0
ns
t
Data Valid to End 7
7
8
10
15
20
ns
DW
of Write
tDH
Data Hold Time
0
0
0
0
0
0
ns
tWZ
Write Enable to
Output in High Z
8
8
10
11
15
18 ns
tOW
Output Active from 3
3
3
3
3
3
ns
End of Write
WRITE CYCLE NO. 1 (WE CONTROLLED)(6)
ADDRESS
CE1
CE2
WE
DATA IN
(7)
DATA OUT
tCW
t AW
t AS
DATA UNDEFINED
tWZ(4)
(9)
t WC
tWP
tAH
t DW
DATA VALID
tDH
t OW (4,7)
HIGH IMPEDANCE
Notes:
6.
CE
1
and
WE
are
LOW
and
CE2
is
HIGH
for
WRITE
cycle.
7. OE is LOW for this WRITE cycle to show twz and tow.
8.
If
CE
1
goes
HIGH
or
CE2
goes
LOW
simultaneously
with
WE
HIGH,
the
output
remains
in
a
high
impedance
state.
9. Write Cycle Time is measured from the last valid address to the first transitioning address.
145
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