Recommended Signals and Port Pin Assignments

Pin

Number

Pin Mnemonic

Circuit

Pin Mnemonic

Pin

Number

Signal

Type

Mnemo

nic

DB-25

Pin(F)

Signal

Type

Mnemo

nic

DB-25

Pin(F)

Signal

Type

Mnemo

nic

DB-37

Pin(F)

Signal

Type

Mnemo

nic

M34

Pin(F)

Signal

Type

Mnemo

nic

DB-15

Pin(F)

31

TxD

SD(A)

97

V.28

BB

3

V.11

BB(A)

3

V.11

RD(A)

6

V.35

104

R

V.11

R(A)

4

2

SDEN

SD(B)

99

V.11

BB(B)

16

V.11

RD(B)

24

V.35

104

T

V.11

R(B)

11

32

TxCE

TT(A)

93

V.28

DD

17

V.11

DD(A)

17

V.11

RT(A)

8

V.35

115

V

V.11

B(A)

7**

3

TTEN

TT(B)

95

V.11

DD(B)

9

V.11

RT(B)

26

V.35

115

X

V.11

B(B)

14**

33

ST

ST(A)

89

V.28

DB

15

V.11

DB(A)

15

V.11

ST(A)

5

V.35

114

Y

V.11

S(A)

6

4

STEN

ST(B)

91

V.11

DB(B)

12

V.11

ST(B)

23

V.35

114

AA

V.11

S(B)

13

34

RTS

RS(A)

81

V.28

CB

5

V.11

CB(A)

5

V.11

CS(A)

9

V.28

106

D

V.11

I(A)

5

5

RSEN

RS(B)

83

V.11

CB(B)

13

V.11

CS(B)

27

V.11

I(B)

12

35

DTR

TR(A)

85

V.28

CC

6

V.11

CC(A)

6

V.11

DM(A)

11

V.28

107

E

6

TREN

TR(B)

87

V.11

CC(B)

22

V.11

DM(B)

29

36

DCD_DCE

RRC(A)

79

V.28

CF

8

V.11

CF(A)

8

V.11

RR(A)

13

V.28

109

F

7

RRCEN

RRC(B)

77

V.11

CF(B)

10

V.11

RR(B)

31

37

RL

RL(A)

67

V.28

CE

22

V.28

125

J

8RLEN

38

LL

LL(A)

65

V.28

TM

25

V.10

TM

25

V.10

TM

18

V.28

142

NN

9

LLEN#

39

RxD

RD(A)

50

V.28

BA

2

V.11

BA(A)

2

V.11

SD(A)

4

V.35

103

P

V.11

T(A)

2

10

RDEN#

RD(B)

49

V.11

BA(B)

12

V.11

SD(B)

22

V.35

103

S

V.11

T(B)

9

40

RxC

RT(A)

52

V.28

DA

24

V.11

DA(A)

24

V.11

TT(A)

17

V.35

113

U

V.11

X(A)

7**

11

RTEN#

RT(B)

51

V.11

DA(B)

11

V.11

TT(B)

35

V.35

113

W

V.11

X(B)

14**

41

TxC

TxC(A)

55

12

TxCEN#

TxC(B)

53

42

CTS

CS(A)

57

V.28

CA

4

V.11

CA(A)

4

V.11

RS(A)

7

V.28

105

C

V.11

C(A)

3

13

CSEN#

CS(B)

56

V.11

CA(B)

19

V.11

RS(B)

25

V.11

C(B)

10

43

DSR

DM(A)

59

V.28

CD

20

V.11

CD(A)

20

V.11

TR(A)

12

V.28

108

H

14

DMEN#

DM(B)

58

V.11

CD(B)

23

V.11

TR(B)

30

44

DCD_DTE

RRT(A)

62

15

RRTEN#

RRT(B)

61

45

RI

IC

63

V.28

RL

21

V.10

RL

21

V.10

RL

14

V.28

140

N

16

ICEN#

46

TM

TM(A)

64

V.28

LL

18

V.10

LL

18

V.10

LL

10

V.28

141

L

17

TMEN

SP3508 Multiprotocol Configured as DCE

Interface to System Logic

Interface to Port-

Connector

Receiver_4

Receiver_5

Receiver_6

Driver_7

Driver_8

RS-449

V.35

X.21

Driver_1

RS-232 or V.24

EIA-530

Receiver_2

Receiver_3

Driver_2

Driver_3

Driver_4

Driver_5

Receiver_1

Driver_6

Spare drivers and receivers may be used for optional signals (Signal

Quality, Rate Detect, Standby) or may be disabled using individual

enable pins for each driver and receiver

** X.21 use either B() or

X(), not both

Pin assignments and signal functions are subject to national or regional variation and

proprietary / non-standard implementations

Receiver_7

Receiver_8

DCE CONFIGURATION

Date: 06/14/04

SP3508 Enhanced WAN Multi–Mode Serial Transceiver

© Copyright 2004 Sipex Corporation

27