LTC2862A
60V Fault Protected 3V to 5.5V
RS485/RS422 Transceiver
with Level 4 IEC ESD
Fea T
Descrip T
n
Protected from Overvoltage Line Faults to 60V The LTC 2862A is a low power, 20Mbps or 250kbps RS485/
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RS422 transceiver operating on 3V to 5.5V supplies with
3V to 5.5V Supply Voltage
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60V overvoltage fault protection on the interface pins
20Mbps or Low EMI 250kbps Data Rate
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during all modes of operation, including power-down.
40kV HBM ESD Interface Pins, 15kV Other Pins
n Improvements were made to the LTC2862 for greater ro-
Enhanced Receiver and Failsafe Noise Immunity
n bustness and signal integrity: 40kV HBM and Level 4 IEC
IEC Level 4 ESD and EFT on Interface Pins
n ESD protection on the interface pins; increased resistance
Extended Common Mode Range: 25V
to electrical overstress; increased receiver noise immunity;
n
Guaranteed Failsafe Receiver Operation
additional receiver noise filtering on the LTC2862A-2; and
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High Input Impedance Supports 224 Nodes
an improved failsafe function optimized for high speed in
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MP-Grade Option Available (55C to 125C)
the LTC2862A-1 and noise rejection in the LTC2862A-2.
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Fully Balanced Differential Receiver Thresholds for
Low EMI slew rate limited data transmission is available
Low Duty Cycle Distortion
in the 250kbps LTC2862A-2 option, while the LTC2862A-1
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Current Limited Drivers and Thermal Shutdown
operates to 20Mbps.
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Compliant with TIA/EIA-485-A
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Pin Compatible with LTC2862 and LT 1785
Extended 25V input common mode range and full fail-
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Available in DFN and Leaded Packages
safe operation improve data communication reliability in
electrically noisy environments and in the presence of
large ground loop voltages.
a T
n
Supervisory Control and Data Acquisition (SCADA)
n p D T s Tion Gui De
Industrial Control and Instrumentation Networks
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Automotive and Transportation Electronics
MAX DATA
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PART NUMBER DUPLEX ENABLES RATE (bps)
Building Automation, Security Systems and HVAC
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LTC2862A-1 HALF YES 20M
Medical Equipment
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Lighting and Sound System Control LTC2862A-2 HALF YES 250k
L, LT, LTC, LTM, Linear Technology the Linear logo and Module are registered trademarks of
Analog Devices, Inc.. All other trademarks are the property of their respective owners.
Typical a T
LTC2862A-1 Receiving 10Mbps 200mV Differential
Signal with 1MHz 25V Common Mode Sweep
RS485 Link With Large Ground Loop Voltage
LTC2862A LTC2862A
A,B
A,B
V V
CC1 CC2
50V/DIV
RO1 R R RO2
RE1 RE2
AB
DE1 DE2 AB
0.5V/DIV
DI1 D D DI2
RO
V GROUND LOOP
RO
2862A TA01a
25V PEAK
5V/DIV
GND1 GND2
2862A TA01b
100ns/DIV
2862af
1
For more information www.linear.com/LTC2862A
ion pplica
elec uc ro
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ures
LTC2862A
a Te Maxi Mu M r a T Gs (Note 1)
Supply Voltages Operating Ambient Temperature Range (Note 4)
V ............................................................. 0.3 to 6V LTC2862AC .............................................. 0C to 70C
CC
Logic Input Voltages (RE, DE, DI) .................. 0.3 to 6V LTC2862AI ...........................................40C to 85C
Interface I/O: A, B ..................................... 60V to +60V LTC2862AH ....................................... 40C to 125C
Receiver Output (RO) ......................0.3V to (V +0.3V) LTC2862AMP ..................................... 55C to 125C
CC
Storage Temperature Range .................. 65C to 150C
p in c Fi G T
LTC2862A-1, LTC2862A-2 LTC2862A-1, LTC2862A-2
TOP VIEW TOP VIEW
RO 1 8 V
CC
RO 1 8 V
CC
RE 2 7 B
RE 2 7 B
9
DE 3 6 A
DE 3 6 A
DI 4 5 GND
DI 4 5 GND
S8 PACKAGE
8-LEAD (150mil) PLASTIC SO
DD PACKAGE
T = 150C, = 120C/W, = 39C/W
JMAX JA JC 8-LEAD (3mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
T = 150C, = 43C/W, = 5.5C/W
JMAX JA JC
o r Der i n F Ma T