6

SP505/6/7APN/03

SP505, SP506, SP507 Application Note

© Copyright 2000 Sipex Corporation

Figure 4. SP506 DTE/DCE Programmable Configuration

10

µF10µF

10

µF

27 26

30

28

31

32

1N5819, MBRS140T3, or equiv.

C1-

C2-

C1+

C2+

10

µF

61

59

SP506CF

Drivers

TxD

14

58

56

DTR

13

54

52

RTS

16

63

65

TxC

15

42

44

ST

22

47

45

RL

17

51

49

LL

24

70

71

RxD

1

37

38

RxC

20

66

67

CTS

80

68

69

DSR

78

35

36

DCD

19

39

40

RI

21

76

77

SCT

79

Receivers

10

µF

DB-25 Connector Pins & Signals [DTE/DCE]

2

TXD(a)/RXD(a)

14

TXD(a)/RXD(b)

20

DTR(a)/DSR(a)

23

DTR(b)/DSR(b)

19

RTS(b)/CTS(b)

4

RTS(a)/CTS(b)

11

TXCE(b)/TXC(b)

18

LL/TM

15

*TXC(a)/RXC(a)

12

*TXC(b)/RXC(b)

DEC0

DEC1

DEC2

DEC3

9

10

11

12

SCTEN

TREN

SDEN

Various VCC pins

(Refer to SP506

Datasheet)

24

TXCE(a)/TXC(a)

3

RXD(a)/TXD(a)

16

RXD(b)/TXD(b)

8

DCD(a)/RL or DCD(a)**

10

DCD(b)/DCD(b)

Various GND pins (Refer to SP506 Datasheet)

7

SIGNAL GND (#102)

13

CTS(b)/RTS(b)

6

DSR(a)/DTR(a)

22

DSR(b)/DTR(b)

9

RXC(b)/TXCE(b)

5

CTS(a)/RTS(a)

17

RXC(a)/TXCE(a)

RSEN

RLEN

LLEN

STEN

TTEN

2

3

4

18

5

23

12

7

LATCH

8

GND

* - Driver applies for DCE only on pins 24 and 11. Receiver applies for DTE

only on pins 24 and 11.

** - RL may not be required in some applications and DCD may be required

to be bi-directional. If RL is not required The RL is replaced by DCD(a)

and the #140_DCE is replaced by #109_DCE. The RL driver of the

SP505 will not be in use during DCE mode in this case.

+5V

#103_DTE/#104_DCE

#108_DTE/#107_DCE

#105_DTE/#106_DCE

#114_DTE/#114_DCE

#141_DTE/#142_DCE

#104_DTE/#103_DCE

#115_DTE/#113_DCE

#106_DTE/#105_DCE

#107_DTE/#108_DCE

#109_DTE/#140_DCE**

#142_DTE/#141_DCE

I/O Lines represented by double arrowhead signifies a bi-directional bus.

Input Line

Output Line

#113_DTE/#115_DCE

Optional bi-directional line; if RL (#140) is used, the driver output, RL(a), can go directly to pin. 21, Remote Loopback, of the DB-25.

The RLEN enable pin, if RL is used, can be permanently enabled by tying it to GND.

25

TM/LL

M1 (V.28_Enable)

Mode_Enable

M2 (V.11_Enable)

M0

M3

Mode Selection

M3

M2

M1

M0

Physical Layer

0

0

0

0

SHUTDOWN

0

1

0

0

X.21 (V.11)

0

0

1

0

RS-232 (V.28)

1

1

0

0

RS-449 (V.11 & V.10)

1

1

0

1

EIA-530 (V.11 & V.10)

1

1

1

0

V.35 (V.35 & V.28)

1

1

1

1

EIA-530A (V.11 & V.10)

Mode

Enable

DCE/DTE Control

#140_DTE/#109_DCE

21

RL/DCD(a)**