LTC1543
Software-Selectable
Multiprotocol Transceiver
FEATURES
s
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DESCRIPTIO
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s
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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
®
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
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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
LINER [ LINEAR TECHNOLOGY ]
