Data Sheet

7
Analog Test Circuits
FIGURE 4. FREQUENCY RESPONSE TEST CIRCUIT FIGURE 5. SINE WAVE DISTORTION TEST CIRCUIT
FIGURE 6. CONTROL-TO-SWITCH FEEDTHROUGH NOISE
TEST CIRCUIT
FIGURE 7. SWITCH OFF SIGNAL FEEDTHROUGH TEST
CIRCUIT
Test Circuits and Waveforms
FIGURE 8. HC TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
FIGURE 9. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
V
CC
V
IS
0.1µF
50Ω 10pF
V
CC
/2
V
OS
SWITCH
ON
dB
METER
V
CC
V
IS
10µF
10kΩ 50pF
V
CC
/2
V
OS
SWITCH
ON
DISTORTION
METER
f
IS
= 1kHz TO 10kHz
SINE
WAVE
SWITCH
ALTERNATING
ON AND OFF
t
r
, t
f
≤ 6ns
f
CONT
= 1MHz
50% DUTY
CYCLE
SCOPE
V
OS
10pF
600Ω
V
CC
/2
600Ω
V
CC
V
CC
V
IS
0.1µF
RC
V
CC
/2
V
OS
SWITCH
OFF
dB
METER
R
V
CC
/2
V
C
= V
IL
f
IS
≥ 1MHz SINEWAVE
R = 50Ω
C = 10pF
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%
CD74HC4067, CD74HCT4067