LTC2862/LTC2863/
LTC2864/LTC2865
60V Fault Protected 3V to 5.5V
RS485/RS422 Transceivers
Fea T Descrip T
n
Protected from Overvoltage Line Faults to 60V The LTC 2862/LTC2863/LTC2864/LTC2865 are low power,
n
3V to 5.5V Supply Voltage 20Mbps or 250kbps RS485/RS422 transceivers operating
n
20Mbps or Low EMI 250kbps Data Rate on 3V to 5.5V supplies that feature 60V overvoltage fault
n
protection on the data transmission lines during all modes
15kV ESD Interface Pins, 8kV All Other Pins
n
of operation, including power-down. Low EMI slew rate
Extended Common Mode Range: 25V
n
limited data transmission is available in a logic-selectable
Guaranteed Failsafe Receiver Operation
n 250kbps mode in the LTC2865 and in 250kbps versions of
High Input Impedance Supports 256 Nodes
n the LTC2862-LTC2864. Enhanced ESD protection allows
1.65V to 5.5V Logic Supply Pin (V ) for Flexible
L
these parts to withstand 15kV HBM on the transceiver
Digital Interface (LTC2865)
interface pins without latchup or damage.
n
MP-Grade Option Available (55C to 125C)
n
Fully Balanced Differential Receiver Thresholds for
Extended 25V input common mode range and full fail-
Low Duty Cycle Distortion
safe operation improve data communication reliability in
n
Current Limited Drivers and Thermal Shutdown
electrically noisy environments and in the presence of
n
Pin Compatible with LT1785 and LT1791
large ground loop voltages.
n
Available in DFN and Leaded Packages
p D T s T Gui De
a T
PART MAX DATA
NUMBER DUPLEX ENABLES RATE (bps) V PIN
L
n
Supervisory Control and Data Acquisition (SCADA)
LTC2862-1 HALF YES 20M NO
n
Industrial Control and Instrumentation Networks
LTC2862-2 HALF YES 250k NO
n
Automotive and Transportation Electronics
LTC2863-1 FULL NO 20M NO
n
Building Automation, Security Systems and HVAC
LTC2863-2 FULL NO 250k NO
n
Medical Equipment
LTC2864-1 FULL YES 20M NO
n
Lighting and Sound System Control
LTC2864-2 FULL YES 250k NO
L, LT, LTC, LTM, Linear Technology the Linear logo and Module are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners. LTC2865 FULL YES 20M/250k YES
LTC2865 Receiving 10Mbps 200mV Differential
Typical a T
Signal with 1MHz 25V Common Mode Sweep
RS485 Link With Large Ground Loop Voltage
A,B
LTC2862 LTC2862
A,B
50V/DIV
VCC1 VCC2
RO1 R R RO2 A-B
A-B
RE1 RE2
R R
t t
0.5V/DIV
DE1 DE2
DI1 D D DI2
RO
RO
V GROUND LOOP 5V/DIV
2862345 TA01a
25V PEAK
GND1 GND2
2862345 TA01b
100ns/DIV
2862345fc
1
For more information www.linear.com/LTC2862
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ion uresLTC2862/LTC2863/
LTC2864/LTC2865
a T e Maxi Mu M r a T Gs
(Note 1)
Supply Voltages Receiver Output (RO)
V ............................................................. 0.3 to 6V (LTC2865) ..................................0.3V to (V + 0.3V)
CC L
V .............................................................. 0.3 to 6V Operating Ambient Temperature Range (Note 4)
L
Logic Input Voltages (RE, DE, DI, SLO) .......... 0.3 to 6V LTC286xC ................................................ 0C to 70C
Interface I/O: A, B, Y, Z .............................. 60V to +60V LTC286xI .............................................40C to 85C
Receiver Output (RO) LTC286xH .......................................... 40C to 125C
(LTC2862-LTC2864) ...................0.3V to (V +0.3V) LTC286xMP ....................................... 55C to 125C
CC
Storage Temperature Range .................. 65C to 150C
Lead Temperature (Soldering, 10 sec) ...................300C
p c Fi G T
LTC2862-1, LTC2862-2 LTC2862-1, LTC2862-2
TOP VIEW
TOP VIEW
RO 1 8 V
CC
RO 1 8 V
CC
RE 2 7 B
RE 2 7 B
DE 9
3 6 A
DE 3 6 A
DI GND
4 5
DI 4 5 GND
S8 PACKAGE
8-LEAD (150mil) PLASTIC SO
DD PACKAGE
T = 150C, = 150C/W, = 39C/W
JMAX JA JC
8-LEAD (3mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
T = 150C, = 43C/W, = 3C/W
JMAX JA JC
LTC2863-1, LTC2863-2 LTC2863-1, LTC2863-2
TOP VIEW
TOP VIEW
V 1 8 A
CC
V 1 8 A
CC
RO 2 7 B
RO 2 7 B
9
DI 3 6 Z
DI 3 6 Z
GND Y
4 5
GND Y
4 5
S8 PACKAGE
8-LEAD (150mil) PLASTIC SO
DD PACKAGE
T = 150C, = 150C/W, = 39C/W
JMAX JA JC
8-LEAD (3mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
T = 150C, = 43C/W, = 3C/W
JMAX JA JC
LTC2864-1, LTC2864-2 LTC2864-1, LTC2864-2
TOP VIEW
TOP VIEW
NC 1 14 V
CC
RO 1 10 V
CC
RO 2 13 NC
RE 2 9 A
11
RE 3 12 A DE 3 8 B
DI 4 7 Z
DE 4 11 B
GND 5 6 Y
DI 5 10 Z
GND 6 9 Y
DD PACKAGE
10-LEAD (3mm 3mm) PLASTIC DFN
GND 7 8 NC
EXPOSED PAD (PIN 11) CONNECT TO PCB GND
T = 150C, = 43C/W, = 3C/W
JMAX JA JC
S PACKAGE
14-LEAD (150mil) PLASTIC SO
T = 150C, = 88C/W, = 37C/W
JMAX JA JC
2862345fc
2
For more information www.linear.com/LTC2862
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