31

Date: 06/14/04

SP3508 Enhanced WAN Multi–Mode Serial Transceiver

© Copyright 2004 Sipex Corporation

Figure 51. SP3508 Typical Operating Configuration to Serial Port Connector with DCE/DTE programmability

20 (V.11, V.28)

DTR_DSR_A

23 (V.11)

DTR_DSR_B

1µF

1µF

C

VDD

C1-

C2-

C1+

C2+

1µF

SP3508CF

TxD

TxCE

ST

RTS

DTR

DCD_DCE

RL

RxC

TxC

CTS

DSR

DCD_DTE

RI

TM

10µF

µDB-26 Serial Port Connector Pins

Signal (DTE_DCE)

2 (V.11, V.35, V.28)

TXD_RXD_A

14 (V.11, V.35)

TXD_RXD_B

11 (V.11, V.35)

TXCE_TXC_B

25 (V.10, V.28)

LL_TM

15 (V.11, V.35, V.28)

*TXC_RXC_A

12 (V.11, V.35)

*TXC_RXC_B

SDEN

24 (V.11, V.35, V.28)

TXCE_TXC_A

3 (V.11, V.35, V.28)

RXD_TXD_A

16 (V.11, V.35)

RXD_TXD_B

8 (V.11, V.28)

DCD_DCD_A

10 (V.11)

DCD_DCD_B

9 (V.11, V.35)

RXC_TXCE_B

17 (V.11, V.35, V.28)

RXC_TXCE_A

LLEN

STEN

GND

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

Receiver applies for DTE only on pins 15 and 12.

+3.3V

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

Input Line

Output Line

LL

RxD

TTEN

RSEN

TREN

RRCEN

RLEN

RDEN

TMEN

TxCEN

RTEN

CSEN

DMEN

RRTEN

ICEN

TERM_OFF

D_LATCH

D0

D1

D2

Charge Pump Section

Transceiver Section

Logic Section

+3.3V

21 (V.10, V.28)

RL_RI

22 (V.10, V.28)

RI_RL

18 (V.10, V.28)

LL_TM

DCE/DTE

Driver applies for DCE only on pins 8 and 10.

Receiver applies for DTE only on pins 8 and 10.

LOOPBACK

+3.3V

19 (V.11)

RTS_CTS_B

4 (V.11, V.28)

RTS_CTS_A

6 (V.11, V.28)

DSR_DTR_A

22 (V.11)

DSR_DTR_B

13 (V.11)

CTS_RTS_B

5 (V.11, V.28)

CTS_RTS_A

31

SD(a)

35

34

38

39

40

42

43

44

41

32

36

45

37

46

AGND

SD(b)

TT(a)

TT(b)

ST(a)

ST(b)

RS(a)

RS(b)

TR(a)

TR(b)

RRC(a)

RRC(b)

RL(a)

RD(a)

LL(a)

RD(b)

RT(a)

RT(b)

TxC(a)

TxC(b)

CS(a)

CS(b)

DM(a)

DM(b)

RRT(a)

RRT(b)

IC

TM(a)

18

19

20

97

99

93

95

89

91

81

83

85

87

79

77

67

50

65

49

51

55

53

57

56

59

58

62

61

63

64

52

21

22

30

28

+3.3V

24

26

68

27

C3+

C3-

69

72

70

74

76

29

1µF

C1

C2

C3

C

VSS1

C

VSS2

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

33