MC14584B
V
DD
14
PULSE
GENERATOR
OUTPUT
INPUT
7 V
SS
C
L
20 ns
INPUT
90%
50%
10%
90%
50%
10%
t
f
t
r
t
PLH
20 ns
V
DD
V
SS
V
OH
V
OL
t
PHL
OUTPUT
Figure 1. Switching Time Test Circuit and Waveforms
V
in
V
H
V
in
V
DD
V
T+
V
T–
V
SS
V
DD
V
out
V
SS
V
out
V
H
V
in
V
DD
V
T+
V
T–
V
SS
V
DD
V
out
V
SS
(a) Schmitt Triggers will square up inputs with slow
rise and fall times.
(b) A Schmitt trigger offers maximum noise immunity
in gate applications.
Figure 2. Typical Schmitt Trigger Applications
V
DD
Vout , OUTPUT VOLTAGE (Vdc)
0
0
V
T–
V
H
V
T+
V
DD
V
in
, INPUT VOLTAGE (Vdc)
Figure 3. Typical Transfer Characteristics
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