7

Test Circuits and Waveforms

FIGURE 1. HC CLOCK PULSE RISE AND FALL TIMES AND

PULSE WIDTH

FIGURE 2. HCT CLOCK PULSE RISE AND FALL TIMES AND

PULSE WIDTH

FIGURE 3. HC TRANSITION TIMES AND PROPAGATION

DELAY TIMES, COMBINATION LOGIC

FIGURE 4. HCT TRANSITION TIMES AND PROPAGATION

DELAY TIMES, COMBINATION LOGIC

FIGURE 5. HC SETUP TIMES, HOLD TIMES, REMOVAL TIME,

AND PROPAGATION DELAY TIMES FOR EDGE

TRIGGERED SEQUENTIAL LOGIC CIRCUITS

FIGURE 6. HCT SETUP TIMES, HOLD TIMES, REMOVAL TIME,

AND PROPAGATION DELAY TIMES FOR EDGE

TRIGGERED SEQUENTIAL LOGIC CIRCUITS

CLOCK

90%

50%

10%

GND

50%

50%

10%

I

CLOCK

2.7V

1.3V

0.3V

GND

3V

1.3V

1.3V

0.3V

I

90%

50%

10%

50%

10%

INVERTING

OUTPUT

INPUT

GND

90%

2.7V

1.3V

0.3V

1.3V

10%

INVERTING

OUTPUT

INPUT

GND

3V

90%

GND

GND

50%

90%

10%

GND

CLOCK

INPUT

DATA

INPUT

OUTPUT

SET, RESET

OR PRESET

50%

50%

90%

10%

50%

90%

IC

50pF

GND

3V

GND

3V

1.3V

2.7V

0.3V

GND

CLOCK

INPUT

DATA

INPUT

OUTPUT

SET, RESET

OR PRESET

3V

1.3V

1.3V

1.3V

90%

10%

1.3V

90%

IC

50pF

1.3V

1.3V

CD74HC373, CD74HCT373, CD54HC573, CD74HC573, CD74HCT573