MC74LCX157

LCX DATA

BR1339 — REV 3

5

MOTOROLA

WAVEFORM 1 – NON–INVERTING PROPAGATION DELAYS

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

2.7V

0V

VOH

VOL

In, S

Zn

tPLH

tPHL

1.5V

1.5V

1.5V

1.5V

Figure 3. AC Waveforms

WAVEFORM 2 – INVERTING PROPAGATION DELAYS

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

2.7V

0V

VOH

VOL

E, S

Zn

tPLH

tPHL

1.5V

1.5V

1.5V

1.5V

PULSE

GENERATOR

RT

DUT

VCC

RL

CL

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