ADM485ARM 데이터 시트보기 (PDF) - Analog Devices

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ADM485ARM

5 V Low Power EIA RS-485 Transceiver

Analog Devices 

SWITCHING CHARACTERISTICS

3V

1.5V

1.5V

0V

B

1/2VO

VO

tPLH

tPHL

A

+VO

90% POINT

tSKEW = tPLH – tPHL

90% POINT

0V

10% POINT

–VO

tR

10% POINT

tF

Figure 26. Driver Propagation Delay, Rise/Fall Timing

DE

1.5V

tZL

3V

1.5V

0V

tLZ

A, B

A, B

2.3V

tZH

2.3V

VOL + 0.5V

tHZ

VOH – 0.5V

VOL

VOH

0V

Figure 27. Driver Enable/Disable Timing

ADM485

A, B

RO

RE

RO

RO

0V

0V

0V

tPLH

tPHL

VOH

1.5V

tSKEW = tPLH – tPHL

1.5V

VOL

Figure 28. Receiver Propagation Delay

1.5V

tZL

3V

1.5V

0V

tLZ

1.5V

OUTPUT LOW

VOL + 0.5V

VOL

tZH

tHZ

OUTPUT HIGH

1.5V

VOH

VOH – 0.5V

Figure 29. Receiver Enable/Disable Timing

Rev. F | Page 11 of 16

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