UPD448012-B55X 查看數據表（PDF） - NEC => Renesas Technology
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UPD448012-B55X
NEC => Renesas Technology
UPD448012-B55X Datasheet PDF : 24 Pages
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µPD448012-X
Write Cycle (1/2) (B version)
Parameter
Symbol
VCC ≥ 2.7 V
Unit Condition
µPD448012 µPD448012 µPD448012 µPD448012
-B55X
-B70X
-B85X
-B10X
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
Write cycle time
/CE1 to end of write
CE2 to end of write
/LB, /UB to end of write
Address valid to end of write
Address setup time
Write pulse width
Write recovery time
Data valid to end of write
Data hold time
/WE to output in high impedance
Output active from end of write
tWC
55
70
85
100
ns
tCW1
50
55
70
80
ns
tCW2
50
55
70
80
ns
tBW
50
55
70
80
ns
tAW
50
55
70
80
ns
tAS
0
0
0
0
ns
tWP
45
50
55
60
ns
tWR
0
0
0
0
ns
tDW
25
30
35
40
ns
tDH
0
0
0
0
ns
tWHZ
20
25
30
35
ns
tOW
5
5
5
5
ns
Note
Note The output load is 1TTL + 5 pF.
Write Cycle (2/2) (C version)
Parameter
Symbol
VCC ≥ 2.2V
Unit Condition
µPD448012 µPD448012 µPD448012 µPD448012
-C70X
-C85X
-C10X
-C12X
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
Write cycle time
/CE1 to end of write
CE2 to end of write
/LB, /UB to end of write
Address valid to end of write
Address setup time
Write pulse width
Write recovery time
Data valid to end of write
Data hold time
/WE to output in high impedance
Output active from end of write
tWC
70
85
100
120
ns
tCW1
55
70
80
100
ns
tCW2
55
70
80
100
ns
tBW
55
70
80
100
ns
tAW
55
70
80
100
ns
tAS
0
0
0
0
ns
tWP
50
55
60
85
ns
tWR
0
0
0
0
ns
tDW
30
35
40
60
ns
tDH
0
0
0
0
ns
tWHZ
25
30
35
40
ns
tOW
5
5
5
5
ns
Note
Note The output load is 1TTL + 5 pF.
Data Sheet M14466EJ5V0DS
11
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