D43257B 查看數據表（PDF） - NEC => Renesas Technology
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D43257B Datasheet PDF : 20 Pages
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µPD43257B
Read Cycle
Parameter
Symbol
Read cycle time
tRC
Address access time
tAA
/CE1 access time
tCO1
CE2 access time
tCO2
Output hold from address change
tOH
/CE1 to output in low impedance
tLZ1
CE2 to output in low impedance
tLZ2
/CE1 to output in high impedance
tHZ1
CE2 to output in high impedance
tHZ2
µPD43257B-70
MIN.
MAX.
70
70
70
70
10
10
10
30
30
Notes 1. See the output load shown in Figure 1.
2. See the output load shown in Figure 2.
µPD43257B-85
MIN.
MAX.
85
85
85
85
10
10
10
30
30
Unit Condition
ns
ns Note 1
ns
ns
ns
ns Note 2
ns
ns
ns
Remark These AC characteristics are in common regardless of package types and L, LL versions.
Read Cycle Timing Chart
Address (Input)
/CE1 (Input)
CE2 (Input)
I/O (Output)
tRC
tAA
tCO1
tLZ1
tCO2
tLZ2
High impedance
Remark In read cycle, /WE should be fixed to high level.
tOH
tHZ1
tHZ2
Data out
Data Sheet M10693EJ7V0DS00
9
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