74VCX16240
VIH
Dn Vm
tPLH
On
Vm
Vm
VIH
0V
tPHL
VOH
Vm
VOL
WAVEFORM 3 − PROPAGATION DELAYS
tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
OEn
tPZH
On
tPZL
On
Vm
tPHZ
Vm
tPLZ
Vm
0V
VOH
Vy
≈ 0V
≈ VCC
Vx
VOL
WAVEFORM 4 − OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
Figure 6. AC Waveforms
Table 4. AC WAVEFORMS
Symbol
VCC
3.3 V ± 0.3 V
2.7 V
VIH
2.7 V
2.7 V
Vm
1.5 V
1.5 V
Vx
VOL + 0.3 V
VOL + 0.3 V
Vy
VOH − 0.3 V
VOH − 0.3 V
VCC
PULSE
GENERATOR
DUT
RT
RL
CL
RL
6V or VCC × 2
OPEN
GND
Figure 7. Test Circuit
Table 5. TEST CIRCUIT
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6 V at VCC = 3.3 ± 0.3 V;
VCC × 2 at VCC = 2.5 ± 0.2 V; 1.8 ± 0.15 V
tPZH, tPHZ
GND
CL = 50 pF or equivalent (Includes jig and probe capacitance)
RL = 500 W or equivalent
RT = ZOUT of pulse generator (typically 50W)
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