MC74LCX257 Datasheet, PDF (5/8 Pages) Motorola, Inc – Low-Voltage CMOS Quad 2-Input Multiplexer

MC74LCX257
In, S ^1.5V
tPLH
Zn
2.7V
1.5V
0V
tPHL
VOH
1.5V
1.5V
VOL
WAVEFORM 1 – NON–INVERTING PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
S ^1.5V
tPLH
Zn
2.7V
1.5V
0V
tPHL
VOH
1.5V
1.5V
VOL
WAVEFORM 2 – INVERTING PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
OE
1.5V
1.5V
tPZH
Zn
tPHZ
1.5V
2.7V
0V
VCC
VOH – 0.3V
≈ 0V
tPZL
tPLZ
≈ 3.0V
Zn
1.5V
VOL + 0.3V
GND
WAVEFORM 3 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 1. AC Waveforms
PULSE
GENERATOR
VCC
DUT
RT
R1
CL
RL
6V
OPEN
GND
LCX DATA
BR1339 — REV 3
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6V
Open Collector/Drain tPLH and tPHL
6V
tPZH, tPHZ
GND
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 2. Test Circuit
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