6

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com

SP486_487_00_066

TEST CIRCUITS

R

R

V

OC

A

V

OD

B

Figure . Driver DC Test Load

500 ohms

S1

S2

OUTPUT

UNDER TEST

Figure 3. Driver Timing Test Load

+3V

0V

DI

A

B

+

–

1.5V

1.5V

V

= V(A) - V(B)

DIFF

90%

90%

10%

10%

Figure 4. Driver Propagation Delays

Figure 2. Driver Timing Test

Figure 5. Driver Enable/Disable Timing

+3V

0V

EN

5V

A,B

0V

1.5V

1.5V

A,B

2.3V

2.3V

0.5V

0.5V

Output normally LOW

Output normally HIGH