Fail-Safe, High-Speed (10Mbps),

Slew-Rate-Limited RS-485/RS-422 Transceivers

16

______________________________________________________________________________________

DI

DE

3V

Y

Z

OUTPUT

UNDER TEST

500

Ω

S1

S2

Figure 7. Driver Timing Test Circuit

Figure 8. Driver Enable/Disable Timing Test Load

DI

3V

0V

Z

Y

0V

1.5V

10%

90%

90%

1.5V

10%

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

3V

0V

Y, Z

Y, Z

0V

1.5V

1.5V

2.3V

2.3V

DE

Figure 9. Driver Propagation Delays

Figure 10. Driver Enable and Disable Times (except

MAX3081/MAX3084/MAX3087)

A

B

1V

-1V

1.5V

1.5V

OUTPUT

INPUT

RO

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

3V

0V

RO

RO

0V

1.5V

1.5V

1.5V

1.5V

RE

Figure 11. Receiver Propagation Delays

Figure 12. Receiver Enable and Disable Times (except

MAX3081/MAX3084/MAX3087)