MC14512B
V
DD
20 ns
t
20 ns
DATA
V
DD
90%
DISABLE
INHIBIT
A
B
C
50%
10%
V
SS
Z
t
PLH
PHL
90%
50%
V
OH
C
L
Z
10%
V
OL
X0
X1
X2
X3
X4
X5
X6
X7
t
t
THL
TLH
PULSE
GENERATOR
TEST CONDITIONS:
INHIBIT = V
SS
A, B, C = V
SS
20 ns
INHIBIT,
A, B, OR C
20 ns
V
DD
90%
50%
10%
V
SS
t
t
PLH
PHL
V
SS
V
OH
90%
50%
10%
Parameter
Inhibit to Z
A, B, C to Z
Test Conditions
A, B, C = V , X = V
DD
Z
SS
O
V
OL
Inh = V , X = V
t
t
TLH
SS
O
DD
THL
Figure 2. AC Test Circuit and Waveforms
V
DD
20 ns
PULSE
GENERATOR
20 ns
V
DD
V
DD
90%
50%
10%
DISABLE
INHIBIT
A
V
DD
Z
DISABLE
INPUT
V
SS
C
L
S1
S2
V
B
C
X0
X1
X2
X3
t
1 k
PZL
V
t
PLZ
S3
S4
OH
90%
≈ 2.5 V @ V = 5 V,
10 V, AND 15 V
DD
10%
OUTPUT
OUTPUT
V
OL
t
t
PZH
PHZ
≈ 2 V @ V = 5 V
DD
V
SS
≈ 6 V @ V = 10 V
OH
DD
90%
X4
X5
X6
X7
10%
≈ 10 V @ V = 15 V
DD
V
SS
V
OL
Switch Positions for 3–State Test
Test
S1
S2
S3
S4
t
Open
Closed
Closed
Open
Closed Closed
Open
Closed
Closed
Open
PHZ
V
SS
t
t
Open
Open
Open
Open
PLZ
PZL
PZH
t
Closed Closed
Figure 3. 3–State AC Test Circuit and Waveform
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