RS-232 View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

RS-232

RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

Exar Corporation 

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SP339E

REV. 1.0.4

RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

BLOCK DIAGRAM BY MODE (MODE1, MODE0)

FIGURE 1. MODE 00 - LOOPBACK

C2

C3

0.1µF

0.1µF

C1

0.1µF

C4

0.1µF

Cc

1.0µF

40

39

38

37

36

35

34

33

32

31

L1

1

R1

30

L2

2

R2

29

L3

3

T1

28

L4

4

L6

5

L7

6

L8

7

L9

8

27

T2

26

R3

25

T3

24

R4

23

R5

Vcc

9

22

All pull-downs 330k̢

10

21

11

12

13

14

15

16

17

18

19

20

11

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