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LTC1543

Software-Selectable

Multiprotocol Transceiver

FEATURES

s

s

DESCRIPTIO

s

s

s

s

Software-Selectable Transceiver Supports:

RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21

TUV/Detecon Inc. Certified NET1 and NET2

Compliant (Test Report No. NET2/102201/97)

TBR2 Compliant (Test Report No. CTR2/022701/98)

Software-Selectable Cable Termination Using

the LTC1344A

Complete DTE or DCE Port with LTC1544, LTC1344A

Operates from Single 5V Supply

The LTC

廬

1543 is a 3-driver/3-receiver multiprotocol trans-

ceiver that operates from a single 5V supply. The LTC1543

and LTC1544 form the core of a complete software-select-

able DTE or DCE interface port that supports the RS232,

RS449, EIA530, EIA530-A, V.35, V.36 or X.21 protocols.

Cable termination may be implemented using the LTC1344A

software-selectable cable termination chip or by using exist-

ing discrete designs.

The LTC1543 runs from a single 5V supply using an internal

charge pump that requires only five space-saving surface

mounted capacitors. The part is available in a 28-lead SSOP

surface mount package.

, LTC and LT are registered trademarks of Linear Technology Corporation.

APPLICATIO S

s

s

s

Data Networking

CSU and DSU

Data Routers

TYPICAL APPLICATIO

LL

CTS

DSR

DTE or DCE Multiprotocol Serial Interface with DB-25 Connector

DCD

DTR

RTS

RXD

RXC

TXC

SCTE

TXD

LTC1544

D4

R4

R3

R2

R1

D3

D2

D1

R3

R2

R1

LTC1543

D3

D2

D1

18

LL A (141)

13 5

CTS B

CTS A (106)

10 8

DSR B

DSR A (109)

22 6

DCD B

DCD A (107)

23 20 19 4

DTR B

DTR A (108)

RTS B

RTS A (105)

SHIELD (101)

1

SG (102)

7

16 3

RXD B

RXD A (104)

9

RXC B

17

RXC A (115)

12 15 11 24 14

SCTE B

SCTE A (113)

TXD B

TXD A (103)

TXC B

TXC A (114)

DB-25 CONNECTOR

U

LTC1344A

2

1543 TA01

U

U

1

next

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