+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

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21

+

TX

HDPLX

DI/T1IN

T1OUT

R1OUT

R1IN

DE/T2IN

GND

FAST

SHDN

T2OUT

RO/R2OUT

R2IN

RX

RTS

CTS

13

RS-485/RS-232

12

11

10

19

8

10

17

9

18

Y(A)

RS-485

Z(B)

7

6

1

412

20

5

RJ45

DB9

RS-232

SHDN

μP

MAX3100

214

UART

MAX3161

SPI

Typical Application Circuit

EIA/TIA-232

STANDARD

CONNECTOR

PIN

MAX3160

MAX3161

MAX3162

PIN NUMBER

EQUIVALENT

MAX3160

MAX3161

MAX3162

FUNCTION

(as seen by DTE)

DCD

1

Data Carrier Detect

RD

2

R2IN

13

17

19

Received Data

TD

3

T1OUT

5

5

5

Transmitted Data

DTR

4

Data Terminal Ready

SG

5

GND

4

4

4

Signal Ground

DSR

6

Data Set Ready

RTS

7

T2OUT

6

8

8

Request to Send (= DTE

ready)

CTS

8

R1IN

14

18

20

Clear to Send (= DCE ready)

RI

9

Ring Indicator

Table 14. Cable Connections Commonly Used for EIA/TIA-232 and

V.24 Asynchronous Interfaces