SP504MCM-L View Datasheet(PDF) - Exar Corporation

Part Name

Description

Manufacturer

SP504MCM-L

WAN Multi-Mode Serial Transceiver

Exar Corporation 

+5V

10µF

1N5819

22µF

22µF

22µF

25

VCC

27 26 30 28

VDD C1+ C1- C2+

Charge Pump

31

C2-

VSS 32

22µF

A

B

RD(a) 70

14 TxD

RxD 1

RD(b) 71

RT(a) 37

RxC 20

RT(b) 38

CS(a) 66

61 SD(a)

59 SD(b)

13 DTR

58 TR(a)

56 TR(b)

16 RTS

CTS 80

CS(b) 67

DM(a) 68

DSR 78

54 RS(a)

52 RS(b)

17 RL

47 RL(a)

45 RL(b)

DM (b) 69

RR(a) 35

DCD 19

A — Receiver Tri-State Circuitry & V.35

terminaiton resistor circuitry for

RxD, RxC & SC. T

RR(b) 36

B — Driver Tri-State circuitry &V.35

termination circuitry for TxD,

TxC & S.T

IC(a) 39

RI 21

24 LL

51 LL(a)

49 LL(b)

22 ST

42 ST(a)

44 ST(b)

IC(b) 40

23 STEN

SCT(a) 76

15 TxC

SCT 79

63 TT(a)

RS-422 Mode

Input Word

0

1

0

0

0

1

0

0

SCTEN 7

SCT(b) 77

5

4

3

External

2

Latch

9

10

11

12

65 TT(b)

6 TTEN

SP504

(SEE PAGE 12 FOR GROUND PINS)

Note 1

For V.35 Termination, needs to be connected

for proper V.35 operation. A low on-

resistance (≤1Ω) FET or switch can be used

to connect and disconnect the resistor from

the non-inverting output.

Figure 19. SP504 Typical Operating Circuit

150Ω

Note 1

150Ω

Note 1

150Ω

Note 1

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

20

SP504_102_121708

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