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HD74HC258 Datasheet

  • HD74HC258

  • Quad. 2-to-1-line Data Selectors/Multiplexers(with 3-state o...

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HD74HC258
Quad. 2-to-1-line Data Selectors/Multiplexers
(with 3-state outputs)
Description
The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with
bus lines in a bus organized system. When the output control input line is taken high, the outputs of all four
multiplexers are sent into a high impedance state. When the output control line is low, the select input
chooses whether the A or B input is used.
Features
鈥?/div>
High Speed Operation: t
pd
(Data to Y) = 11 ns typ (C
L
= 50 pF)
鈥?/div>
High Output Current: Fanout of 15 LSTTL Loads
鈥?/div>
Wide Operating Voltage: V
CC
= 2 to 6 V
鈥?/div>
Low Input Current: 1 碌A(chǔ) max
鈥?/div>
Low Quiescent Supply Current: I
CC
(static) = 4 碌A(chǔ) max (Ta = 25擄C)
Function Table
Inputs
Output Control
H
L
L
L
L
Select
X
L
L
H
H
A
X
L
H
X
X
B
X
X
X
L
H
Outputs
Y
Z
H
L
H
L
Notes H: high level
L : low level
X: irrelevant
Z: off (high-impedance) state of a 3-state output

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