11

-

+

-

+

-

+

CTR (20) DATA

TERMINAL READY

DSRS (24) DATA

SIGNALING RATE

RS-232

INPUTS AND OUTPUTS

TD (2) TRANSMIT DATA

RTS (4) REQUEST TO SEND

RD (3) RECEIVE DATA

CTS (5) CLEAR TO SEND

SIGNAL GROUND (7)

15

8

13

7

14

16

-

+

6

R2

R1

T2

T1

9

12

10

11

4

5

3

1

HIN202

C1

0.1

µF

C2

0.1

µF

TD

RTS

RD

CTS

SELECT

+5V

INPUTS

OUTPUTS

TTL/CMOS

FIGURE 9. SIMPLE DUPLEX RS-232 PORT WITH CTS/RTS HANDSHAKING

-

+

RS-232

INPUTS AND OUTPUTS

DTR (20) DATA TERMINAL READY

DSRS (24) DATA SIGNALING RATE SELECT

DCD (8) DATA CARRIER DETECT

R1 (22) RING INDICATOR

SIGNAL GROUND (7)

15

8

13

7

14

2

-

4

R2

R1

T2

T1

9

12

10

11

3

1

HIN202

C1

0.1

µF

DTR

DSRS

DCD

R1

+5V

INPUTS

OUTPUTS

TTL/CMOS

-

+

-

+

TD (2) TRANSMIT DATA

RTS (4) REQUEST TO SEND

RD (3) RECEIVE DATA

CTS (5) CLEAR TO SEND

8

13

7

14

15

R2

R1

T2

T1

9

12

10

11

4

5

3

1

HIN202

C1

0.1

µF

C2

0.1

µF

TD

RTS

RD

CTS

INPUTS

OUTPUTS

TTL/CMOS

-

+

5

C2

0.1

µF

16

C3

0.2

µF

6

2

6

V-

V+

-

C4

0.2

µF

16

FIGURE 10. COMBINING TWO HIN202s FOR 4 PAIRS OF RS-232 INPUTS AND OUTPUTS

HIN202, HIN206, HIN207, HIN208, HIN211, HIN213