HD74HCT540 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD74HCT540

Octal Buffers/Line Drivers (with 3-state outputs)

Hitachi -> Renesas Electronics 

HD74HCT540/HD74HCT541

Octal Buffers/Line Drivers (with 3-state outputs)

Description

The HD74HCT540 is an inverting buffer and the HD74HCT541 is a non-inverting buffer. The 3-state

control gate operates as a two-input NOR such that if either G1 or G2 are high, all eight outputs are in the

high-impedance state.

Features

• LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility

• High Speed Operation: tpd (A to Y) = 12 ns typ (CL = 50 pF)

• High Output Current: Fanout of 15 LSTTL Loads

• Wide Operating Voltage: VCC = 4.5 to 5.5 V

• Low Input Current: 1 µA max

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

Function Table

Inputs

G1

G2

A

L

L

L

L

L

H

H

X

X

X

H

X

X : irrelevant

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

Outputs Y

HD74HCT540

H

L

Z

Z

HD74HCT541

L

H

Z

Z

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