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UPD43257BCZ-70L Datenblatt(PDF) 9 Page - NEC

Teilenummer UPD43257BCZ-70L
Bauteilbeschribung  MOS INTEGRATED CIRCUIT 256K-BIT CMOS STATIC RAM 32K-WORD BY 8-BIT
PDF  24 Pages
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Hersteller  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD43257BCZ-70L Datenblatt(HTML) 9 Page - NEC

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Data Sheet M10693EJ9V0DS
9
μPD43257B
Read Cycle
Parameter
Symbol
μPD43257B-70
μPD43257B-85
Unit
Condition
MIN.
MAX.
MIN.
MAX.
Read cycle time
tRC
70
85
ns
Address access time
tAA
70
85
ns
Note 1
/CE1 access time
tCO1
70
85
ns
CE2 access time
tCO2
70
85
ns
Output hold from address change
tOH
10
10
ns
/CE1 to output in low impedance
tLZ1
10
10
ns
Note 2
CE2 to output in low impedance
tLZ2
10
10
ns
/CE1 to output in high impedance
tHZ1
30
30
ns
CE2 to output in high impedance
tHZ2
30
30
ns
Notes 1. See the output load shown in Figure 1.
2. See the output load shown in Figure 2.
Remark These AC characteristics are in common regardless of package types and L, LL versions.
Read Cycle Timing Chart
tHZ2
tRC
tOH
tHZ1
tLZ2
tCO2
tLZ1
tCO1
tAA
High impedance
Data out
CE2 (Input)
/CE1 (Input)
Address (Input)
I/O (Output)
Remark
In read cycle, /WE should be fixed to high level.



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