Switching Specifications Input t , t = 6ns (Continued)
r
f
o
o
o
o
o
25 C
-40 C TO 85 C -55 C TO 125 C
TEST
V
CC
PARAMETER
SYMBOL CONDITIONS (V)
MIN TYP MAX
MIN
MAX
95
19
16
10
-
MIN
MAX
110
22
UNITS
ns
Transition Times (Figure 1)
t
, t
TLH THL
C = 50pF
L
2
4.5
6
-
-
-
-
-
-
-
75
15
13
10
-
-
-
-
-
-
-
-
-
-
-
ns
-
19
ns
Input Capacitance
C
-
-
-
-
10
pF
I
Power Dissipation Capacitance
(Notes 3, 4)
C
5
37
-
pF
PD
HCT TYPES
Propagation Delay, Input to
Output Y (Figure 2)
t
, t
PLH PHL
C = 50pF
4.5
5
-
-
-
25
-
-
-
31
-
-
-
38
-
ns
ns
L
Propagation Delay, Data Input to
Output Y
t , t
PLH PHL
C = 15pF
10
L
Transition Times (Figure 2)
Input Capacitance
t
, t
TLH THL
C = 50pF
4.5
-
-
-
-
-
-
15
10
-
-
-
-
19
10
-
-
-
-
22
10
-
ns
pF
pF
L
C
C = 50pF
L
I
Power Dissipation Capacitance
(Notes 3, 4)
C
-
5
51
PD
NOTES:
3. C
is used to determine the dynamic power consumption, per gate.
2
PD
4. P = V
f (C
PD
+ C ) where f = input frequency, C = output load capacitance, V = supply voltage.
CC
D
CC
i
L
i
L
Test Circuits and Waveforms
t = 6ns
f
t = 6ns
t = 6ns
t = 6ns
r
r
f
V
3V
CC
90%
50%
10%
2.7V
1.3V
0.3V
INPUT
INPUT
GND
GND
t
t
t
t
THL
TLH
THL
TLH
90%
1.3V
90%
50%
10%
INVERTING
OUTPUT
INVERTING
OUTPUT
10%
t
t
PLH
PHL
t
t
PLH
PHL
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
6
TI [ TEXAS INSTRUMENTS ]
