LTC2846_15 Datasheet, PDF (1/24 Pages) Linear Technology – 3.3V Software-Selectable Multiprotocol Transceiver with Termination

LTC2846
3.3V Software-Selectable
Multiprotocol Transceiver
with Termination
FEATURES
s _{Software-Selectable Transceiver Supports:}
RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21
s _{Operates from Single 3.3V Supply}
s _{TUV Rheinland of North America Inc. Certified NET1,}
NET2 and TBR2 Compliant, Report No.:
TBR2/050101/02, TBR2/051501/02
s _{1.2MHz Boost Switching Regulator for 3.3V to 5V}
Conversion
s _{On-Chip Cable Termination}
s _{Complete DTE or DCE Port with LTC2844 or LTC2845}
s _{Small Footprint}
s _{Available in 36-Lead SSOP (0.209 Wide) Package}
U
APPLICATIO S
s _{Data Networking}
s _{CSU and DSU}
s _{Data Routers}
DESCRIPTIO
The LTC^®2846 is a 3-driver/3-receiver multiprotocol trans-
ceiver with on-chip cable termination. When combined with
the LTC2844 or 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 LTC2846. The LTC2846 has a boost regulator that takes
in a 3.3V input and switches at 1.2MHz, allowing the use of
tiny, low cost capacitors and inductors 2mm or less in height.
The 5V output drives an internal charge pump that requires
only five space-saving surface mounted capacitors. The
LTC2846 is available in a 36-lead SSOP surface mount
package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Complete DTE or DCE Multiprotocol Serial Interface with DB-25 Connector
LL CTS DSR
DCD DTR RTS
RXD RXC
TXC SCTE TXD
LTC2844
D4
R4 R3 R2 R1
D3 D2 D1
LTC2846
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
2846 TA01
sn2846 2846fs
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