LTC1546I View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1546I Datasheet PDF : 20 Pages
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LTC1546
APPLICATIO S I FOR ATIO
DTE
SERIAL
CONTROLLER
LTC1546
TXD
D1
TXD
SCTE
D2
SCTE
D3
TXC
R1
103Ω
TXC
RXC
R2
103Ω
RXC
RXD
R3
103Ω
RXD
DCE
LTC1546
103Ω
R3
103Ω
R2
R1
D3
D2
D1
SERIAL
CONTROLLER
TXD
SCTE
TXC
RXC
RXD
LTC1544
RTS
D1
RTS
DTR
D2
DTR
D3
DCD
R1
DCD
DSR
R2
DSR
CTS
R3
CTS
LL
LL
D4
R4
LTC1544
R3
R2
R1
D3
D2
D1
R4
D4
RTS
DTR
DCD
DSR
CTS
LL
1546 F17
Figure 17. Complete Multiprotocol Interface in EIA530 Mode
Cable Termination
Traditional implementations used expensive relays to
switch resistors or required the user to change termina-
tion modules every time a new interface standard was
selected. Switching the terminations with FETs is difficult
because the FETs must remain off when the signal voltage
is beyond the supply voltage. Alternatively, custom cables
may contain termination in the cable head or route signals
to various terminations on the board.
The LTC1546/LTC1544 chipset solves the cable termina-
tion switching problem by automatically providing the
appropriate termination and switching on-chip for the
V.10 (RS423), V.11 (RS422), V.28 (RS232) and V.35
electrical protocols.
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