Datasheet

LTC2872
28
2872f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2012
LT 0312 • PRINTED IN USA
relaTeD parTs
Typical applicaTion
Figure 31. LTC2872 on Left: RS485 Half-Duplex and Terminated, Plus RS232.
LTC2872 on Right: Dual RS485 Half-Duplex and Terminated. All External Components Shown
PART NUMBER DESCRIPTION COMMENTS
LTC2870/LTC2871 RS232/RS485 Multiprotocol Transceivers with
Integrated Termination
3V to 5.5V Supply, Automatic Selection of Termination Resistors,
Duplex Control, Logic Supply Pin, ±26kV ESD
LTC1334 Single 5V RS232/RS485 Multiprotocol Transceiver Dual Port, Single 5V Supply, Configurable, ±10kV ESD
LTC1387 Single 5V RS232/RS485 Multiprotocol Transceiver Single Port, Configurable
LTC2801/LTC2802/
LTC2803/LTC2804
1.8V to 5.5V RS232 Single and Dual Transceivers Up to 1Mbps, ±10kV ESD, Logic Supply Pin, Tiny DFN Packages
LTC2854/LTC2855 3.3V 20Mbps RS485 Transceiver with Integrated
Switchable Termination
3.3V Supply, Integrated, Switchable, 120Ω Termination Resistor, ±25kV ESD
LTC2859/LTC2861 20Mbps RS485 Transceiver with Integrated
Switchable Termination
5V Supply, Integrated, Switchable, 120Ω Termination Resistor, ±15kV ESD
LTM2881 Complete Isolated RS485/RS422 μModule
®
Transceiver + Power
20Mbps, 2500V
RMS
Isolation with Integrated DC/DC Converter,
Integrated Switchable 120Ω Termination Resistor, ±15kV ESD
LTM2882 Dual Isolated RS232 µModule Transceiver + Power 1Mbps, 2500V
RMS
Isolation with Integrated DC/DC Converter, ±10kV ESD
2872 F31
5V
1.8V
V
L
485/232_1
TE485_1
DZ1
H/F
485/232_2
TE485_2
LB
GND
V
CC
SW
22µH
470nF
CAP
LTC2872 LTC2872
RS485
CAT5e
CABLE
DYI
RA1
Z1
Y1
Z1
A1
B1
DY1
RA1
DY2
DZ2
RA2
RA2
V
DD
V
EE
Y2
Z2
A2
A2
Y1
120Ω
120Ω
2.2µF
0.1µF
2.2µF 2.2µF
RS232
3.3V
INTERFACE
1.8V
INTERFACE
V
DD
V
EE
2.2µF 2.2µF
V
L
485/232_1
485/232_2
TE485_1
TE485_2
DZ1
H/F
DZ2
LB
GND
3.3V
V
CC
SW
22µH
470nF
CAP
2.2µF
120Ω
A1
B1
120Ω
DY2
RA2
Z2
Y2
A2
B2
120Ω
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