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Linear Technology Electronic Components Datasheet

LTC2863HS8-1 Datasheet

RS485/RS422 Transceivers

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LTC2862/LTC2863/
LTC2864/LTC2865
±60V Fault Protected 3V to 5.5V
RS485/RS422 Transceivers
Features
n Protected from Overvoltage Line Faults to ±60V
n 3V to 5.5V Supply Voltage
n 20Mbps or Low EMI 250kbps Data Rate
n ±15kV ESD Interface Pins, ±8kV All Other Pins
n Extended Common Mode Range: ±25V
n Guaranteed Failsafe Receiver Operation
n High Input Impedance Supports 256 Nodes
n 1.65V to 5.5V Logic Supply Pin (VL) for Flexible
Digital Interface (LTC2865)
n MP-Grade Option Available (–55°C to 125°C)
n Fully Balanced Differential Receiver Thresholds for
Low Duty Cycle Distortion
n Current Limited Drivers and Thermal Shutdown
n Pin Compatible with LT1785 and LT1791
n Available in DFN and Leaded Packages
Applications
n Supervisory Control and Data Acquisition (SCADA)
n Industrial Control and Instrumentation Networks
n Automotive and Transportation Electronics
n Building Automation, Security Systems and HVAC
n Medical Equipment
n Lighting and Sound System Control
L, LT, LTC, LTM, Linear Technology the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
Description
The LTC®2862/LTC2863/LTC2864/LTC2865 are low power,
20Mbps or 250kbps RS485/RS422 transceivers operating
on 3V to 5.5V supplies that feature ±60V overvoltage fault
protection on the data transmission lines during all modes
of operation, including power-down. Low EMI slew rate
limited data transmission is available in a logic-selectable
250kbps mode in the LTC2865 and in 250kbps versions of
the LTC2862-LTC2864. Enhanced ESD protection allows
these parts to withstand ±15kV HBM on the transceiver
interface pins without latchup or damage.
Extended ±25V input common mode range and full fail-
safe operation improve data communication reliability in
electrically noisy environments and in the presence of
large ground loop voltages.
Product Selection Guide
PART
NUMBER
LTC2862-1
LTC2862-2
LTC2863-1
LTC2863-2
LTC2864-1
LTC2864-2
LTC2865
DUPLEX
HALF
HALF
FULL
FULL
FULL
FULL
FULL
ENABLES
YES
YES
NO
NO
YES
YES
YES
MAX DATA
RATE (bps)
20M
250k
20M
250k
20M
250k
20M/250k
VL PIN
NO
NO
NO
NO
NO
NO
YES
Typical Application
RS485 Link With Large Ground Loop Voltage
LTC2865 Receiving 10Mbps ±200mV Differential
Signal with 1MHz ±25V Common Mode Sweep
LTC2862
VCC1
VCC2
LTC2862
A,B
A,B
50V/DIV
RO1
R
RE1
DE1
R
RO2
A-B
Rt
Rt
RE2
A-B
DE2 0.5V/DIV
DI1
D
V GROUND LOOP
GND1
≤25V PEAK
GND2
D
DI2
2862345 TA01a
RO
RO
5V/DIV
100ns/DIV
For more information www.linear.com/LTC2862
2862345 TA01b
2862345fc
1


Linear Technology Electronic Components Datasheet

LTC2863HS8-1 Datasheet

RS485/RS422 Transceivers

No Preview Available !

LTC2862/LTC2863/
LTC2864/LTC2865
Absolute Maximum Ratings
(Note 1)
Supply Voltages
VCC............................................................. –0.3 to 6V
VL............................................................... –0.3 to 6V
Logic Input Voltages (RE, DE, DI, SLO)........... –0.3 to 6V
Interface I/O: A, B, Y, Z............................... –60V to +60V
Receiver Output (RO)
(LTC2862-LTC2864)....................–0.3V to (VCC+0.3V)
Receiver Output (RO)
(LTC2865) ...................................–0.3V to (VL + 0.3V)
Operating Ambient Temperature Range (Note 4)
LTC286xC................................................. 0°C to 70°C
LTC286xI..............................................–40°C to 85°C
LTC286xH........................................... –40°C to 125°C
LTC286xMP........................................ –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
LTC2862-1, LTC2862-2
TOP VIEW
RO 1
RE 2
DE 3
DI 4
8 VCC
7B
6A
5 GND
S8 PACKAGE
8-LEAD (150mil) PLASTIC SO
TJMAX = 150°C, θJA = 150°C/W, θJC = 39°C/W
LTC2863-1, LTC2863-2
TOP VIEW
VCC 1
RO 2
DI 3
GND 4
8A
7B
6Z
5Y
S8 PACKAGE
8-LEAD (150mil) PLASTIC SO
TJMAX = 150°C, θJA = 150°C/W, θJC = 39°C/W
LTC2864-1, LTC2864-2
NC 1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
TOP VIEW
14 VCC
13 NC
12 A
11 B
10 Z
9Y
8 NC
S PACKAGE
14-LEAD (150mil) PLASTIC SO
TJMAX = 150°C, θJA = 88°C/W, θJC = 37°C/W
LTC2862-1, LTC2862-2
TOP VIEW
RO 1
8 VCC
RE 2
7B
DE 3
9
6A
DI 4
5 GND
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
TJMAX = 150°C, θJA = 43°C/W, θJC = 3°C/W
LTC2863-1, LTC2863-2
TOP VIEW
VCC 1
8A
RO 2
7B
DI 3
9
6Z
GND 4
5Y
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
TJMAX = 150°C, θJA = 43°C/W, θJC = 3°C/W
LTC2864-1, LTC2864-2
TOP VIEW
RO 1
RE 2
DE 3
DI 4
GND 5
10 VCC
9A
11
8B
7Z
6Y
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
EXPOSED PAD (PIN 11) CONNECT TO PCB GND
TJMAX = 150°C, θJA = 43°C/W, θJC = 3°C/W
2
For more information www.linear.com/LTC2862
2862345fc


Part Number LTC2863HS8-1
Description RS485/RS422 Transceivers
Maker Linear
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