UPD43256B-X Просмотр технического описания (PDF) - NEC => Renesas Technology
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UPD43256B-X
NEC => Renesas Technology
UPD43256B-X Datasheet PDF : 20 Pages
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μPD43256B-X
Write Cycle (1/2)
Parameter
Symbol
μPD43256B-70X
Write cycle time
tWC
/CS to end of write
tCW
Address valid to end of write
tAW
Write pulse width
tWP
Data valid to end of write
tDW
Data hold time
tDH
Address setup time
tAS
Write recovery time
tWR
/WE to output in high impedance
tWHZ
Output active from end of write
tOW
Note See the output load.
MIN.
70
60
60
55
30
5
0
0
5
MAX.
30
VCC ≥ 4.5 V
μPD43256B-85X
MIN.
85
70
70
60
35
5
0
0
5
MAX.
30
μPD43256B-AxxX
μPD43256B-BxxX
MIN.
MAX.
100
80
80
70
40
5
0
0
35
5
Unit Con-
dition
ns
ns
ns
ns
ns
ns
ns
ns
ns Note
ns
Remark These AC characteristics are in common regardless of package types and L, LL versions.
Write Cycle (2/2)
Parameter
Symbol
VCC ≥ 3.0 V
VCC ≥ 2.7 V
Unit Con-
μPD43256B- μPD43256B- μPD43256B- μPD43256B- μPD43256B- μPD43256B-
A85X
A10X
A12X
B10X
B12X
B15X
dition
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
Write cycle time
tWC
85
/CS to end of write
tCW
70
Address valid to
end of write
tAW
70
Write pulse width
tWP
60
Data valid to end
of write
Data hold time
tDW
60
tDH
5
Address setup time
tAS
0
Write recovery time tWR
0
/WE to output in
high impedance
Output active
from end of write
tWHZ
tOW
5
Note See the output load.
100
120
100
120
150
ns
70
90
70
90
100
ns
70
90
70
90
100
ns
60
80
60
80
90
ns
60
70
60
70
80
ns
5
5
5
5
5
ns
0
0
0
0
0
ns
0
0
0
0
0
ns
35
35
40
35
40
40 ns Note
5
5
5
5
5
ns
Remark These AC characteristics are in common regardless of package types.
Data Sheet M11012EJ6V0DS
11
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