LTC2847_15 Datasheet, PDF (1/20 Pages) Linear Technology – Software-Selectable Multiprotocol Transceiver with Termination and 3.3V Digital Interface

LTC2847
Software-Selectable
Multiprotocol Transceiver with
Termination and 3.3V Digital Interface
FEATURES
s _{Software-Selectable Transceiver Supports:}
RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21
s _{Operates from Single 5V Supply}
s _{Separate Supply Pin for Digital Interface Works}
down to 3V
s _{On-Chip Cable Termination}
s _{Complete DTE or DCE Port with LTC2845}
s _{Available in 38-Pin 5mm × 7mm QFN Package}
U
APPLICATIO S
s _{Data Networking}
s _{CSU and DSU}
s _{Data Routers}
DESCRIPTIO
The LTC^®2847 is a 3-driver/3-receiver multiprotocol trans-
ceiver with on-chip cable termination. When combined with
the LTC2845, 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 LTC2847.
The V_CC supplies the drivers, the receivers and an internal
charge pump that requires only five space-saving surface
mounted capacitors. The V_IN supply drives the digital inter-
face circuitry including the receiver output drivers. It can be
tied to V_CC or be powered off a lower supply (down to 3V) to
interface with low voltage ASICs. The LTC2847 is available in
a 0.8mm tall, 5mm × 7mm QFN package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Complete DTE or DCE Multiprotocol Serial Interface with DB-25 Connector
RL TM LL RI CTS DSR
DCD DTR RTS
RXD RXC
TXC SCTE TXD
LTC2845
D5
D4
R5
R4 R3 R2 R1
D3 D2 D1
LTC2847
D3
D2
D1
R3
R2
R1
T
T
T
T
T
21 25 18 * 13 5 22 6
10 8 23 20 19 4 1 7 16 3 9 17
12 15 11 24 14 2
*OPTIONAL
DB-25 CONNECTOR
2847 TA01
sn2847 2847fs
1