5

FIGURE 2A. TEST CIRCUIT

FIGURE 2B. MEASUREMENT POINTS

FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES

FIGURE 3A. TEST CIRCUIT

FIGURE 3B. MEASUREMENT POINTS

FIGURE 3. DRIVER ENABLE AND DISABLE TIMES

D

DE

DI

SIGNAL

GENERATOR

Z

Y

OUT (Y)

3V

0V

1.5V

1.5V

50%

50%

OUT (Z)

50%

50%

DIFF OUT (Y - Z)

90%

90%

10%

10%

DI

SKEW = |CROSSING PT. OF Y

↑ & Z↓ - CROSSING PT. OF Y↓ & Z↑|

D

DE

DI

500

Ω

Z

Y

GND

SW

PARAMETER OUTPUT

RE

DI

SW

Y/Z

X

1/0

GND

15

Y/Z

X

0/1

15

Y/Z

X

1/0

GND

100

Y/Z

X

0/1

100

SIGNAL

GENERATOR

OUT (Y, Z)

3V

0V

1.5V

1.5V

0V

2.3V

OUT (Y, Z)

2.3V

DE

OUTPUT HIGH

OUTPUT LOW

ISL4485E