7

SP505/6/7APN/03

SP505, SP506, SP507 Application Note

© Copyright 2000 Sipex Corporation

Figure 5. SP507 DTE/DCE Programmable Configuration (Similar configuration to competitor's 3-chip solution.)

10

µF10µF

10

µF

27 26

30

28

31

32

1N5819, MBRS140T3, or equiv.

C1-

C2-

C1+

C2+

10

µF

61

59

SP507CF

Drivers

TxD

14

58

56

DTR

13

54

52

RTS

16

63

65

TxC

15

42

44

DCE_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

TM

21

76

77

DTE_ST

79

Receivers

10

µF

M0

M1

M2

10

11

12

STEN

RREN

RTEN

Various VCC pins

(Refer to SP507

Datasheet)

Various GND pins (Refer to SP507 Datasheet)

TMEN

SCTEN

LLEN

RLEN

TTEN

2

3

7

4

5

18

6

23

+5V

LATCH

8

GND

+5V

+5V

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)

24

TXCE(a)/TXC(a)

3

RXD(a)/TXD(a)

16

RXD(b)/TXD(b)

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)

8

*DCD(a)/DCD(a)

10

*DCD(b)/DCD(b)

7

SIGNAL GND

#103_DTE/#104_DCE

#108_DTE/#107_DCE

#105_DTE/#106_DCE

#114_DTE/#114_DCE

#141_DTE/#141_DCE

#104_DTE/#103_DCE

#115_DTE/#113_DCE

#106_DTE/#105_DCE

#107_DTE/#108_DCE

#113_DTE/#115_DCE

DCE/DTE Control

#109_DTE/#109_DCE

* - Driver applies for DCE mode only on pins 15 and 12 for signal TxC.

Receiver applies for DTE mode only on pins 15 and 12.

Driver applies for DCE mode only on pins 8 and 10 for signal DCD.

Receiver applies for DTE mode only on pins 15 and 12.

Receiver applies for DCE mode only on pin 18 for signal LL. Driver

applies for DTE mode only on pin 18.

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

Input Line

Output Line

M0

M1

M2

Mode Selection

M2 M1

M0

Physical Layer

0

0

0

V.11 (RS-422)

0

0

1

EIA-530A

0

1

0

EIA-530

0

1

1

X.21

1

0

0

V.35

1

0

1

RS-449 (V.36)

1

1

0

RS-232

1

1

1

SHUTDOWN

Mode

Enable

TERM_OFF

1 SHIELD GND