74LCX02 Test circuit
7/15
5 Test circuit
Figure 4. Test circuit
C
L
= 50pF or equivalent (includes jig and probe capacitance)
R
L
= 500
Ω
or equivalent
R
T
= Z
OUT
of pulse generator (typically 50
Ω
)
Table 7. AC electrical characteristics
Symbol Parameter
Test condition Value
Unit
V
CC
(V)
C
L
(pF)
R
L
(Ω)
t
s
= t
r
(ns)
-40 to 85 °C
Min Max
t
PLH
t
PHL
Propagation delay
time
2.7
50 500 2.5
4.4
ns
3.0 to 3.6 1.0 5.4
t
OSLH
t
OSHL
Output to output
skew time
(1)
(2)
1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two
outputs of the same device switching in the same direction, either HIGH or LOW (t
OSLH
= | t
PLHm
- t
PLHn
|,
t
OSHL
= | t
PHLm
- t
PHLn
|)
2. Parameter guaranteed by design
3.0 to 3.6 50 500 2.5 1.0 ns
Table 8. Capacitive characteristics
Symbol Parameter
Test condition Value
Unit
V
CC
(V)
T
A
= 25 °C
Min Typ Max
C
IN
Input capacitance 3.3
V
IN
= 0 to V
CC
6pF
C
PD
Power dissipation
capacitance
(1)
1. C
PD
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the
operating current consumption without load. (Refer to Test Circuit). Average operating current can be
obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/4 (per gate)
3.3
f
IN
= 10MHz
V
IN
= 0 or V
CC
43 pF