+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

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13

Test Circuits (continued)

OUTPUT

UNDER TEST

S1

S2

500

Ω

Figure 4. RS-485/422 Driver Enable/Disable Timing Test Load

DI

3V

0

Z

Y

0

1.5V

10%

90%

90%

1.5V

10%

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

3V

0

Y, Z

Y, Z

0

1.5V

1.5V

2.3V

2.3V

DE485

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

3V

0

RO

RO

0

1.5V

1.5V

1.5V

1.5V

RE485

Figure 5. RS-485/422 Driver Propagation Delays

Figure 6. RS-485/422 Driver Enable and Disable Times

A

B

1V

-1V

OUTPUT

INPUT

RO

A

B

R

RO

Figure 7. RS-485/422 Receiver Propagation Delays

Figure 9. RS-485/422 Receiver Propagation Delays Test Circuit

Figure 8. MAX3162 RS-485/422 Receiver Enable and Disable

Times