13

SP3238EDS/04

SP3238E +3.0V to +5.5V RS-232 Transceivers

© Copyright 1999 Sipex Corporation

Figure 16. Driver Output Voltages vs. Load Current

per Transmitter

Figure 17. Circuit for the connectivity of the SP3238E with a DB-9 connector

TBD

6. DCE Ready

7. Request to Send

8. Clear to Send

9. Ring Indicator

DB-9 Connector Pins:

1. Received Line Signal Detector

2. Received Data

3. Transmitted Data

4. Data Terminal Ready

5. Signal Ground (Common)

6

7

8

9

1

2

3

4

5

DB-9

Connector

26

0.1

µF

C5

+

0.1

µF

0.1

µF

GND

2

To

µP Supervisor

Circuit

8

9

11

5k

Ω

5k

Ω

5k

Ω

16

21

20

18

5

6

7

R

R

R

R

R

R

R

10

12

24

23

22

T

T

T

T

T

T

19

17

T

T

T

T

SP3238E

28

25

3

1

27

4

C3

C4

+

+

C1+

C1-

C2+

C2-

V+

V-

0.1

µF

0.1

µF

+

C2

C1

+

13

14

15

ONLINE

SHUTDOWN

STATUS