Datasheet

7
HCT TYPES
Propagation Delay Time
(Figure 1)
t
PLH,
t
PHL
C
L
= 50pF 4.5 - - 32 - 40 - 48 ns
nCP to nQ
0
C
L
=15pF 5 - 13 - - - - - ns
nCP to nQ
1
t
PLH,
t
PHL
C
L
= 50pF 4.5 - - 44 - 55 - 66 ns
nCP to nQ
2
t
PLH,
t
PHL
C
L
= 50pF 4.5 - - 50 - 63 - 75 ns
nCP to nQ
3
t
PLH,
t
PHL
C
L
= 50pF 4.5 - - 62 - 78 - 93 ns
MR to Q
n
t
PLH,
t
PHL
C
L
= 50pF 4.5 - - 32 - 40 - 48 ns
C
L
=15pF 5 - 13 - - - - - ns
Output Transition t
TLH
,t
THL
C
L
= 50pF 4.5 - - 15 - 19 - 22 ns
Input Capacitance C
IN
C
L
=15pF - - - 10 - 10 - 10 pF
Power Dissipation Capacitance
(Notes 3, 4)
C
PD
C
L
=15pF 5 - 21 - - - - - pF
NOTES:
3. C
PD
is used to determine the dynamic power consumption, per stage.
4. P
D
= V
CC
2
f
i
(C
PD
+ C
L
) where f
i
= Input Frequency, C
L
= Output Load Capacitance, V
CC
= Supply Voltage.
Switching Specifications Input t
r
, t
f
= 6ns (Continued)
PARAMETER SYMBOL
TEST
CONDITIONS
V
CC
(V)
25
o
C -40
o
C TO 85
o
C -55
o
C TO 125
o
C
UNITSMIN TYP MAX MIN MAX MIN MAX
Test Circuits and Waveforms
FIGURE 1. HC AND HCU TRANSITION TIMES AND PROPAGA-
TION DELAY TIMES, COMBINATION LOGIC
FIGURE 2. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
t
PHL
t
PLH
t
THL
t
TLH
90%
50%
10%
50%
10%
INVERTING
OUTPUT
INPUT
GND
V
CC
t
r
= 6ns t
f
= 6ns
90%
t
PHL
t
PLH
t
THL
t
TLH
2.7V
1.3V
0.3V
1.3V
10%
INVERTING
OUTPUT
INPUT
GND
3V
t
r
= 6ns
t
f
= 6ns
90%
CD54HC393, CD74HC393, CD54HCT393, CD74HCT393