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CD74HC273 Datasheet(Fiches technique) 6 Page - Texas Instruments

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Numéro de pièce CD74HC273
Description  High Speed CMOS Logic Octal D-Type Flip-Flop with Reset
Télécharger  8 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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6
Power Dissipation
Capacitance
(Notes 5, 6)
CPD
-
5
25
-
-
-
pF
HCT TYPES
Propagation Delay,
Clock to Output (Figure 4)
tPLH, tPHL
CL = 50pF
4.5
-
30
38
45
ns
CL = 15pF
5
12
-
-
-
ns
Propagation Delay,
MR to Output (Figure 4)
tPHL
CL = 50pF
4.5
-
32
40
48
ns
Output Transition Time
tTLH, tTHL
CL = 50pF
4.5
-
15
19
22
ns
Input Capacitance
CIN
--
-
10
10
10
pF
Maximum Clock Frequency
fMAX
CL = 15pF
5
50
-
-
-
MHz
Power Dissipation
Capacitance
(Notes 5, 6)
CPD
-
5
25
-
-
-
pF
NOTES:
5. CPD is used to determine the dynamic power consumption, per flip-flop.
6. PD =CPD VCC
2 f
i + ∑ (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
-55oC TO
125oC
UNITS
TYP
MAX
MAX
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%
CD74HC273, CD74HCT273




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