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CD74HCT74 데이터시트(PDF) 6 Page - Texas Instruments

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부품명 CD74HCT74
상세설명  Dual D Flip-Flop with Set and Reset Positive-Edge Trigger
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

CD74HCT74 데이터시트(HTML) 6 Page - Texas Instruments

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6
CP Frequency
fMAX
CL = 15pF
5
-
50
-
----
MHz
Power Dissipation Capacitance
(Notes 6, 7)
CPD
-
5
-
25
-
----
pF
HCT TYPES
Propagation Delay,
CP to Q, Q (Figure 4)
tPLH, tPHL CL = 50pF
4.5
-
-
35
-
44
-
53
ns
Propagation Delay,
R, S to Q, Q (Figure 4)
tPHL, tPLH CL = 50pF
4.5
-
-
40
-
50
-
60
ns
Transition Time (Figure 4)
tTLH, tTHL CL = 50pF
4.5
-
-
15
-
19
-
22
ns
Input Capacitance
CI
-
-
-
-
10
-
10
-
10
pF
CP Frequency
fMAX
CL = 15pF
5
-
50
-
----
MHz
Power Dissipation Capacitance
(Notes 6, 7)
CPD
-
5
-
30
-
----
pF
NOTES:
6. CPD is used to determine the dynamic power consumption, per flip-flop.
7. PD =CPD VCC
2 f
i + Σ (CL VCC
2 f
o) where fi = input frequency, fo = output frequency, CL = output load capacitance, VCC = supply voltage.
Switching Specifications Input tr, tf = 6ns (Continued)
PARAMETER
SYMBOL
TEST
CONDITIONS
VCC
(V)
25oC
-40oC TO 85oC
-55oCTO125oC
UNITS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
Test Circuits and Waveforms
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table. For fMAX, input duty cycle = 50%.
FIGURE 1. HC CLOCK PULSE RISE AND FALL TIMES AND
PULSE WIDTH
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table. For fMAX, input duty cycle = 50%.
FIGURE 2. HCT CLOCK PULSE RISE AND FALL TIMES AND
PULSE WIDTH
FIGURE 3. HC AND HCU TRANSITION TIMES AND PROPAGA-
TION DELAY TIMES, COMBINATION LOGIC
FIGURE 4. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
CLOCK
90%
50%
10%
GND
VCC
trCL
tfCL
50%
50%
tWL
tWH
10%
tWL + tWH =
fCL
I
CLOCK
2.7V
1.3V
0.3V
GND
3V
trCL = 6ns
tfCL = 6ns
1.3V
1.3V
tWL
tWH
0.3V
tWL + tWH =
fCL
I
tPHL
tPLH
tTHL
tTLH
90%
50%
10%
50%
10%
INVERTING
OUTPUT
INPUT
GND
VCC
tr = 6ns
tf = 6ns
90%
tPHL
tPLH
tTHL
tTLH
2.7V
1.3V
0.3V
1.3V
10%
INVERTING
OUTPUT
INPUT
GND
3V
tr = 6ns
tf = 6ns
90%
CD54HC74, CD74HC74, CD74HCT74


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