+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

______________________________________________________________________________________

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

412

20

5

RJ45

DB9

RS-232

SHDN

µP

MAX3100

214

UART

MAX3161

SPI

1

Typical Application Circuit

PIN NUMBER

EIA/TIA-232

STANDARD

CONNECTOR

PIN

MAX3160

MAX3161

MAX3162

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 TIA/EIA-232 and

V.24 Asynchronous Interfaces