UPD43256B-AXX 查看數據表（PDF） - NEC => Renesas Technology
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UPD43256B-AXX Datasheet PDF : 24 Pages
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µPD43256B
Write Cycle (1/2)
Parameter
Symbol
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.
VCC ≥ 4.5 V
µPD43256B-70
µPD43256B-85
µPD43256B-A85/A10/A12
µPD43256B-B10/B12/B15
MIN.
MAX.
MIN.
MAX.
70
85
50
70
50
70
55
60
30
35
0
0
0
0
0
0
30
30
10
10
Unit Condition
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
-A85
-A10
-A12
-B10
-B12
-B15
dition
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
Write cycle time
tWC
85
100
120
100
120
150
ns
/CS to end of write tCW
Address valid to
tAW
end of write
Write pulse width
tWP
Data valid to end
tDW
of write
Data hold time
tDH
Address setup
tAS
Write recovery
tWR
/WE to output in
tWHZ
high impedance
Output active
tOW
from end of write
70
70
90
70
90
100
ns
70
70
90
70
90
100
ns
60
60
80
60
80
90
ns
60
60
70
60
70
80
ns
0
0
0
0
0
0
ns
0
0
0
0
0
0
ns
0
0
0
0
0
0
ns
30
35
40
35
40
50 ns Note
10
10
10
10
10
10
ns
Note See the output load.
Remark These AC characteristics are in common regardless of package types.
Data Sheet M10770EJCV0DS00
13
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