74VCX16240
Dn
Vm
tPLH
VIH
OEn
Vm
VIH
Vm
0V
tPHL VOH
tPZH
On
tPHZ
Vm
0V
VOH
Vy
≈ 0V
On
Vm
Vm
tPZL
tPLZ
VOL
≈
VCC
On
Vm
Vx
VOL
WAVEFORM 1 − PROPAGATION DELAYS
tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
Figure 4. AC Waveforms
Table 2. AC WAVEFORMS
Symbol
VIH
Vm
Vx
Vy
3.3 V ± 0.3 V
2.7 V
1.5 V
VOL + 0.3 V
VOH − 0.3 V
VCC
PULSE
GENERATOR
DUT
RT
VCC
2.5 V ± 0.2 V
VCC
VCC/2
VOL + 0.15 V
VOH − 0.15 V
1.8 V ± 0.15 V
VCC
VCC/2
VOL + 0.15 V
VOH − 0.15 V
RL
CL
RL
6 V or VCC × 2
OPEN
GND
Figure 5. Test Circuit
Table 3. 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 = 30 pF or equivalent (Includes jig and probe capacitance)
RL = 500 W or equivalent
RT = ZOUT of pulse generator (typically 50 W)
http://onsemi.com
7