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MC74LCX540

Low-Voltage CMOS Octal Buffer Flow Through Pinout

ON Semiconductor 

MC74LCX540

Dn

1.5V

tPHL

On

2.7V

1.5V

0V

tPLH

VOH

1.5V

1.5V

VOL

WAVEFORM 1 - PROPAGATION DELAYS

tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns

OEn

tPZH

On

tPZL

On

1.5V

tPHZ

1.5V

tPLZ

1.5V

2.7V

0V

VCC

VOH - 0.3V

≈ 0V

≈ 3.0V

VOL + 0.3V

GND

WAVEFORM 2 - OUTPUT ENABLE AND DISABLE TIMES

tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns

Figure 3. AC Waveforms

PULSE

GENERATOR

VCC

DUT

RT

R1

CL

RL

6V

OPEN

GND

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 4. Test Circuit

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