LTC1546_15 Datasheet, PDF (1/20 Pages) Linear Technology – Software-Selectable Multiprotocol Transceiver with Termination

LTC1546
Software-Selectable
Multiprotocol Transceiver
with Termination
FEATURES
s _{Software-Selectable Transceiver Supports:}
RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21
s _{TUV Telecom Services Inc. Certified NET1,}
NET2 and TBR2 Compliant
s _{On-Chip Cable Termination}
s _{Pin Compatible with LTC1543}
s _{Complete DTE or DCE Port with LTC1544}
s _{Operates from Single 5V Supply}
s _{Small Footprint}
U
APPLICATIO S
s _{Data Networking}
s _{CSU and DSU}
s _{Data Routers}
DESCRIPTIO
The LTC^®1546 is a 3-driver/3-receiver multiprotocol trans-
ceiver with on-chip cable termination. When combined with
the LTC1544, this chip set forms a complete software-
selectable DTE or DCE interface port that supports the
RS232, RS449, EIA530, EIA530-A, V.35, V.36 and X.21
protocols. All necessary cable termination is provided inside
the LTC1546. In most applications, the LTC1546 replaces
both an LTC1543 and an LTC1344A without any changes to
the PC board.
The LTC1546 runs from a single 5V supply using an internal
charge pump that requires only five space-saving surface
mounted capacitors. The LTC1546 is available in a 28-lead
SSOP surface mount package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Complete DTE or DCE Multiprotocol Serial Interface with DB-25 Connector
LL CTS DSR
DCD DTR RTS
RXD RXC
TXC SCTE TXD
LTC1544
D4
R4 R3 R2 R1
D3 D2 D1
LTC1546
D3
D2
D1
R3
R2
R1
T
T
T
T
T
18 13 5 22 6
10 8 23 20 19 4 1 7 16 3 9 17
12 15 11 24 14 2
DB-25 CONNECTOR
1546 TA01
1