74VCXH16240
Dn
Vm
tPLH
On
Vm
Vm
tPHL
Vm
WAVEFORM 1 - PROPAGATION DELAYS
tR = tF = 2.0ns, 10% to 90%; f = 1MHz; tW = 500ns
OEn
tPZH
On
tPZL
On
Vm
tPHZ
Vm
tPLZ
Vm
WAVEFORM 2 - OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.0ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 3. AC Waveforms
VIH
0V
VOH
VOL
VIH
0V
VOH
Vy
≈ 0V
≈ VCC
Vx
VOL
PULSE
GENERATOR
Symbol
VIH
Vm
Vx
Vy
3.3V ±0.3V
2.7V
1.5V
VOL + 0.3V
VOH – 0.3V
VCC
VCC
2.5V ±0.2V
VCC
VCC/2
VOL + 0.15V
VOH – 0.15V
1.8V ±0.15V
VCC
VCC/2
VOL + 0.15V
VOH – 0.15V
DUT
RT
RL
CL
RL
6V or VCC × 2
OPEN
GND
TEST
SWITCH
tPLH, tPHL
tPZL, tPLZ
Open
6V at VCC = 3.3 ±0.3V;
VCC × 2 at VCC = 2.5 ±0.2V; 1.8 ±0.15V
tPZH, tPHZ
GND
CL = 30pF or equivalent (Includes jig and probe capacitance)
RL = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 4. Test Circuit
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