HD74HC258 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD74HC258

Quad. 2-to-1-line Data Selectors/Multiplexers (with 3-state outputs)

Hitachi -> Renesas Electronics 

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

• High Speed Operation: tpd (Data to Y) = 11 ns typ (CL = 50 pF)

• High Output Current: Fanout of 15 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Function Table

Inputs

Output Control Select

A

B

H

X

X

X

L

L

L

X

L

L

H

X

L

H

X

L

L

H

X

H

Notes H: high level

L : low level

X: irrelevant

Z: off (high-impedance) state of a 3-state output

Outputs

Y

Z

H

L

H

L

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