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74VHCT74A Datasheet(PDF) 4 Page - STMicroelectronics

Part No. 74VHCT74A
Description  DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR
Download  10 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHCT74A Datasheet(HTML) 4 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (Input tr =tf =3 ns)
Symb ol
Parameter
Test Co nditi on
Val ue
Un it
VCC
(V)
CL
(pF )
TA =25
oC
-40 to 85
oC
Min.
Typ .
Max.
Min .
Max.
tPLH
tPHL
Propagation Delay
Time CK to Q or Q
5.0
(*)
15
5.8
7.8
1.0
9.0
ns
5.0
(*)
50
6.3
8.8
1.0
10.0
tPLH
tPHL
Propagation Delay
Time
PR or CLR to Q or Q
5.0
(*)
15
7.6
10.4
1.0
12.0
ns
5.0
(*)
50
8.1
11.4
1.0
13.0
tw
CK Pulse Width
HIGH or LOW
5.0
(*)
5.0
5.0
ns
tw
PR or CLR Pulse
Width LOW
5.0
(*)
5.0
5.0
ns
ts
Setup Time D to CK
HIGH or LOW
5.0
(*)
5.0
5.0
ns
th
Hold Time D to CK
HIGH or LOW
5.0
(*)
0.0
0.0
ns
tREM
Removal Time CLR or
PR to CK
5.0
(*)
3.5
3.5
ns
fMAX
Maximum Clock
Frequency
5.0
(*)
15
100
160
80
MHz
5.0
(*)
50
80
140
65
(*) Voltage range is 5V
± 0.5V
CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
T est Cond ition s
Val ue
Un it
TA =25
oC
-40 to 85
oC
Min.
Typ .
Max.
Min .
Max.
CIN
Input Capacitance
4
10
10
pF
CPD
Power Dissipation
Capacitance (note 1)
10.5
pF
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD
• VCC • fIN +ICC/2 (per Gate)
74VHCT74A
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