+5V, Fail-Safe, 40Mbps, Profibus RS-485/

RS-422 Transceivers

10

______________________________________________________________________________________

Y

Z

R

R

Figure 5. Driver DC Test Load

DI

DE

3V

Y

Z

Figure 6. Driver Timing Test Circuit

DI

3V

0V

Z

Y

0V

1.5V

10%

90%

90%

1.5V

10%

Figure 7. Driver Propagation Delays

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

3V

0V

Y, Z

Y, Z

0V

1.5V

1.5V

50%

50%

DE

Figure 9. Driver Enable and Disable Times

A

B

1V

-1V

1.5V

1.5V

OUTPUT

INPUT

RO

Figure 10. Receiver Propagation Delays

3V

0V

RO

RO

0V

1.5V

1.5V

RE

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

1.5V

1.5V

Figure 11. Receiver Enable and Disable Times

S1

S2

OUTPUT

UNDER TEST

Figure 8. Enable/Disable Timing Test Load