Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

14

______________________________________________________________________________________

Figure 22. MAX488–MAX491 Full-Duplex RS-485 Network

120Ω

120Ω

R

D

RO

RE

DE

DI

A

B

Y

120Ω

120Ω

DI

DI

DI

RO

RO

RO

DE

DE

DE

RE

RE

RE

Z

Z

Z

Z

Y

Y

Y

AA

A

BB

B

D

D

D

R

R

R

MAX489

MAX491

NOTE: RE AND DE ON MAX489/MAX491 ONLY.

Figure 23. Line Repeater for MAX488–MAX491

120Ω

120Ω

DATA IN

DATA OUT

R

D

RO

RE

DE

DI

A

B

Z

Y

MAX488–MAX491

NOTE: RE AND DE ON MAX489/MAX491 ONLY.

Isolated RS-485

For isolated RS-485 applications, see the MAX253 and

MAX1480 data sheets.