Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,

12Mbps, RS-485/RS-422 Transceivers in µMAX Package

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11

R

R

Y

Z

Figure 5. Driver DC Test Load

RECEIVER

OUTPUT

TEST POINT

1k

1k

S1

S2

Figure 6. Receiver Enable/Disable Timing Test Load

DI

DE

3V

Y

Z

Figure 7. Driver Timing Test Circuit

OUTPUT

UNDER TEST

500

Ω

S1

S2

Figure 8. Driver Enable/Disable Timing Test Load

DI

3V

0V

Z

Y

0V

1.5V

10%

90%

90%

1.5V

10%

Figure 9. Driver Propagation Delays

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

3V

0V

Y, Z

Y, Z

0V

1.5V

1.5V

2.3V

2.3V

DE

Figure 10. Driver Enable and Disable Times