LTC1543
Software-Selectable
Multiprotocol Transceiver
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FEATURES
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DESCRIPTIO
The LTC®1543 is a 3-driver/3-receiver multiprotocol
transceiver that operates from a single 5V supply. The
LTC1543 and LTC1544 form the core of a complete softwareselectable 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.
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 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.
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APPLICATIO S
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Data Networking
CSU and DSU
Data Routers
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
DTE or DCE Multiprotocol Serial Interface with DB-25 Connector
LL
CTS
DSR
DCD
DTR
RTS
RXD
TXC
RXC
D3
R4
R2
R3
TXD
D2
D1
LTC1543
LTC1544
D4
SCTE
D2
D3
D1
R3
R1
R2
R1
LTC1344A
18
13 5
22 6
10 8
23 20 19 4
1
7
16 3
17
12 15 11 24 14
2
TXD A (103)
TXD B
SCTE A (113)
TXC A (114)
SCTE B
TXC B
RXC A (115)
RXC B
RXD A (104)
RXD B
SG (102)
SHIELD (101)
RTS A (105)
RTS B
DTR A (108)
DCD A (109)
DTR B
DCD B
DSR A (107)
CTS A (106)
DSR B
CTS B
LL A (141)
DB-25 CONNECTOR
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1543 TA01
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