ADM488 Ver la hoja de datos (PDF) - Analog Devices

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ADM488

Full-Duplex, Low Power, Slew Rate Limited, EIA RS-485 Transceivers

Analog Devices 

ADM488/ADM489

SWITCHING CHARACTERISTICS

3V

1.5V

0V

TPLH

B

1/2VO

VO

1.5V

TPHL

A

+VO

0V

–VO

90% POINT

10% POINT

TR

TSKEW

TSKEW

90% POINT

10% POINT

TF

Figure 11. Driver Propagation Delay, Rise/Fall Timing

A–B

0V

0V

TPLH

RO

1.5V

TPHL

1.5V

VOH

VOL

Figure 12. Receiver Propagation Delay

DE

A, B

A, B

RE

R

R

0V

1.5V

TZL

3V

1.5V

0V

TLZ

2.3V

TZH

2.3V

VOL + 0.5V

VOL

THZ

VOH

VOH – 0.5V

0V

Figure 13. Driver Enable/Disable Timing

1.5V

TZL

3V

1.5V

0V

TLZ

1.5V

O/P LOW

TZH

1.5V

O/P HIGH

VOL + 0.5V

VOL

THZ

VOH

VOH – 0.5V

Figure 14. Receiver Enable/Disable Timing

Rev. D | Page 8 of 16

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