MC74LVQ240 Datasheet, PDF (5/8 Pages) Motorola, Inc – LOW-VOLTAGE CMOS OCTAL BUFFER

MC74LVQ240
1Dn, 2Dn ^{50% VCC}
tPLH
1On, 2On
50% VCC
VCC
50% VCC
0V
tPHL
VOH
50% VCC
VOL
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
1OE, 2OE
1On, 2On
1On, 2On
PULSE
GENERATOR
50% VCC
tPZH
tPHZ
50% VCC
50% VCC
VCC
0V
VCC
VOH – 0.3V
tPZL
tPLZ
50% VCC
VOL + 0.3V
GND
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 1. AC Waveforms
VCC
DUT
RT
R1
CL
RL
2 • VCC
OPEN
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
2 • VCC
Open Collector/Drain tPLH and tPHL
2 • VCC
tPZH, tPHZ
Open
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
ECLinPS and ECLinPS Lite
5
DL140 — Rev 3
MOTOROLA