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SN74HC74PW Datasheet(PDF) 10 Page - Texas Instruments

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No. de pieza SN74HC74PW
Descripción Electrónicos  Dual D-Type Positive-Edge-Triggered Flip-Flops
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

SN74HC74PW Datasheet(HTML) 10 Page - Texas Instruments

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PRE
CLK
D
CLR
Q
Q
C
C
C
C
C
C
C
C
C
C
TG
TG
TG
TG
SN54HC74, SN74HC74
SCLS094E – DECEMBER 1982 – REVISED DECEMBER 2015
www.ti.com
8 Detailed Description
8.1 Overview
Figure 3 describes the SNx4HC74 devices. As the SNx4HC74 is a dual D-Type positive-edge-triggered flip-flop
with clear and preset, the diagram below describes one of the two device flip-flops.
8.2 Functional Block Diagram
Figure 3. Logic Diagram (Positive Logic)
8.3 Feature Description
The SNx4HC74 inputs accept voltage levels up to 5.5 V. Refer to the Recommended Operating Conditions for
appropriate input high and low logic levels.
8.4 Device Functional Modes
Table 1 lists the functional modes of the SNx4HC74.
Table 1. Function Table
INPUTS
OUTPUTS
PRE
CLR
CLK
D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
L
L
X
X
H(1)
H(1)
H
H
H
H
L
H
H
L
L
H
H
H
L
X
Q0
Q0
(1)
This configuration is nonstable; that is, it does not persist when PRE or CLR returns to its inactive
(high) level.
10
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Product Folder Links: SN54HC74 SN74HC74


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