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74F189 Arkusz danych(PDF) 2 Page - Fairchild Semiconductor

Numer części 74F189
Szczegółowy opis  64-Bit Random Access Memory with 3-STATE Outputs
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Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74F189 Arkusz danych(HTML) 2 Page - Fairchild Semiconductor

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2
Unit Loading/Fan Out
Function Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
Block Diagram
Pin Names
Description
U.L.
Input IIH/IIL
HIGH/LOW
Output IOH/IOL
A0–A3
Address Inputs
1.0/1.0
20
µA/−0.6 mA
CS
Chip Select Input (Active LOW)
1.0/1.0
20
µA/−1.2 mA
WE
Write Enable Input (Active LOW)
1.0/1.0
20
µA/−0.6 mA
D0–D3
Data Inputs
1.0/1.0
20
µA/−0.6 mA
O 0–O 3
Inverted Data Outputs
150/40 (33.3)
−3.0 mA/24 mA (20 mA)
Inputs
Operation
Condition of Outputs
CS
WE
L
L
Write
High Impedance
L
H
Read
Complement of Stored Data
H
X
Inhibit
High Impedance


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