7

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

FIGURE 4A. TEST CIRCUIT

FIGURE 4B. MEASUREMENT POINTS

FIGURE 4. RECEIVER PROPAGATION DELAY

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

D

DE

DI

500

Ω

Z

Y

GND

SW

(SHDN) for ISL8487 and ISL81483 only.

PARAMETER OUTPUT

RE

DI

SW

Y/Z

X

1/0

GND

15

Y/Z

X

0/1

15

Y/Z

0 (Note 5)

1/0

GND

100

Y/Z

0 (Note 5)

0/1

100

Y/Z

1 (Note 7)

1/0

GND

100

Y/Z

1 (Note 7)

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

NOTE 7

NOTE 7

NOTE 7

SIGNAL

GENERATOR

R

RO

RE

A

B

+1.5V

15pF

RO

3V

0V

1.5V

1.5V

0V

50%

50%

A

ISL8487, ISL81483, ISL81487