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54F74DM Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54F74DM
Description  Dual D-Type Positive Edge-Triggered Flip-Flop
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

54F74DM Datasheet(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagrams
Pin Assignment
for DIP SOIC and Flatpak
TLF9469 – 1
Pin Assignment
for LCC
TLF9469 – 2
Unit LoadingFan Out
54F74F
Pin Names
Description
UL
Input IIH IIL
HIGHLOW
Output IOH IOL
D1 D2
Data Inputs
1010
20 mA b06 mA
CP1 CP2
Clock Pulse Inputs (Active Rising Edge)
1010
20 mA b06 mA
CD1 CD2
Direct Clear Inputs (Active LOW)
1030
20 mA b18 mA
SD1 SD2
Direct Set Inputs (Active LOW)
1030
20 mA b18 mA
Q1 Q1 Q2 Q2
Outputs
50333
b
1 mA20 mA
Truth Table
Inputs
Outputs
SD
CD
CP
D
Q
Q
LH
X
X
H
L
HL
X
X
L
H
LL
X
X
H
H
HH
L
hH
L
HH
L
lL
H
HH
L
X
Q0
Q0
H (h) e HIGH Voltage Level
L (l) e LOW Voltage Level
X e Immaterial
Q0 e Previous Q (Q) before LOW-to-HIGH Clock Transition
Lower case letters indicate the state of the referenced input or output one
setup time prior to the LOW-to-HIGH clock transition
Logic Diagram
TLF9469 – 5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
2


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