Datasheet

4
Output Transition Time t
TLH
, t
THL
C
L
= 50pF 2 - 75 95 110 ns
4.5 - 15 19 22 ns
6 - 13 16 19 ns
Input Capacitance C
I
---1010 10pF
Power Dissipation
Capacitance
(Notes 3, 4)
C
PD
- 5 58 - - - pF
HCT TYPES
Propagation Delay,
Any Input to ΣO
t
PLH
, t
PHL
C
L
= 50pF 4.5 - 45 56 68 ns
C
L
= 15pF 5 19 - - - ns
Propagation Delay,
Any Input to ΣE
t
PLH
, t
PHL
C
L
= 50pF 4.5 - 42 53 63 ns
C
L
= 15pF 5 18 - - - ns
Output Transition Time t
TLH
, t
THL
C
L
= 50pF 4.5 - 15 19 22 ns
Input Capacitance C
IN
---1010 10pF
Power Dissipation
Capacitance
(Notes 3, 4)
C
PD
- 5 58 - - - pF
NOTES:
3. C
PD
is used to determine the dynamic power consumption, per package.
4. P
D
= V
CC
2
f
i
(C
PD
+ C
L
) where f
i
= Input Frequency, f
O
= Output 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
UNITSTYP MAX MAX MAX
Test Circuits and Waveforms
FIGURE 1. HC TRANSITION TIMES AND PROPAGATION
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%
CD54HC280, CD74HC280, CD54HCT280, CD74HCT280