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LTC1545

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. NET2/071601/98)

TBR2 Compliant (Test Report No. CTR2/071601/98)

Software-Selectable Cable Termination Using

the LTC1344A

Complete DTE or DCE Port with LTC1543, LTC1344A

Operates from Single 5V Supply with LTC1543

APPLICATIO S

s

s

s

The LTC

廬

1545 is a 5-driver/5-receiver multiprotocol trans-

ceiver. The LTC1545 and LTC1543 form the core of a

complete software-selectable 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 existing discrete designs.

The LTC1545 runs from a 5V supply and the charge pump on

the LTC1543. The part is available in a 36-lead SSOP surface

mount package.

Data Networking

CSU and DSU

Data Routers

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

TYPICAL APPLICATIO

RL

TM

RI

LL

CTS

DSR

DTE or DCE Multiprotocol Serial Interface with DB-25 Connector

DCD

DTR

RTS

RXD

RXC

TXC

SCTE

TXD

LTC1545

D5

R5

R4

D4

D3

R3

R2

R1

D2

D1

R3

R2

R1

LTC1543

D3

D2

D1

21

25

*

18 13 5

10 8

22 6

23 20 19 4

1

7

16 3

9

17

12 15 11 24 14

DB-25 CONNECTOR

U

LTC1344A

2

U

U

CTS B

DSR B

DSR A (109)

CTS A (106)

DTR B

DTR A (108)

RTS B

RTS A (105)

SHIELD (101)

SG (102)

RXD B

RXD A (104)

RXC B

RXC A (115)

DCD B

DCD A (107)

SCTE B

SCTE A (113)

TXD B

TXD A (103)

TXC B

TXC A (114)

RL A (140)

TM A (142)

RI A (125)

LL A (141)

*OPTIONAL

1545 TA01

1

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