74VHC374MTCX(2007) データシートの表示（PDF） - Fairchild Semiconductor

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74VHC374MTCX
(Rev.:2007)

Octal D-Type Flip-Flop with 3-STATE Outputs

Fairchild Semiconductor 

Logic Symbol

IEEE/IEC

Functional Description

The VHC374 consists of eight edge-triggered flip-flops

with individual D-type inputs and 3-STATE true outputs.

The buffered clock and buffered Output Enable are

common to all flip-flops. The eight flip-flops will store the

state of their individual D inputs that meet the setup and

hold time requirements on the LOW-to-HIGH Clock (CP)

transition. With the Output Enable (OE) LOW, the con-

tents of the eight flip-flops are available at the outputs.

When the OE is HIGH, the outputs go to the high imped-

ance state. Operation of the OE input does not affect the

state of the flip-flops.

Truth Table

Inputs

Dn

CP

OE

H

L

L

L

X

X

H

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

= LOW-to-HIGH Transition

Logic Diagram

Outputs

On

H

L

Z

Please note that this diagram is provided only for the understanding of logic operations and should not be used to

estimate propagation delays.

Figure 1.

©1992 Fairchild Semiconductor Corporation

74VHC374 Rev. 1.3

2

www.fairchildsemi.com

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