LTC2876/LTC2877
60V Rugged PROFIBUS
RS485 Transceivers
Fea T Descrip T
n
PROFIBUS IEC 61158-2 Compliant The LTC 2876 and LTC2877 are PROFIBUS RS485
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Protected from Overvoltage Line Faults to 60V transceivers designed to meet the test specifications for
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PROFIBUS-DP masters and PROFIBUS-DP slaves, fully
52kV ESD Interface Pins, 15kV All Other Pins
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compatible with IEC 61158-2, type 3: medium attachment
2kV (Level 4) IEC61000-4-4 Fast Transient Burst
n unit (MAU). With operation up to 20Mbps, the LTC2876/
25V Working Common Mode Range
n LTC2877 supports all PROFIBUS data rates up to 12Mbps.
20Mbps Maximum Baud Rate
n
1.65V to 5.5V Logic Supply Pin for Flexible Digital
The LTC2876 and LTC2877 are exceptionally robust, toler-
Interfacing (LTC2877)
ating 60V faults on the bus pins and protected to 52kV
n
5V Supply Can Operate Down to 3V for Low Power,
ESD. These devices are suitable for harsh environments
Low Swing Applications
or where 24V power might be inadvertently connected.
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Fully Balanced Differential Receiver Thresholds with
Extended 25V input common mode range and full fail-
240mV Hysteresis for Superior Noise Tolerance and
safe operation improve data communication reliability in
Low Duty Cycle Distortion
noisy systems.
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Receiver Failsafe for Open, Shorted and Terminated
The LTC2876 and LTC2877 meet PROFIBUS and RS485
Conditions
specifications with a supply voltage of 4.5V to 5.5V but
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Wide Operating Temperature Range: 40C to 125C
can operate down to 3V with reduced supply current.
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Available in Small DFN and MSOP Packages
Product Selection Guide
PART NUMBER LOGIC SUPPLY PIN PACKAGE
a T
LTC2876 NO DFN-8, MSOP-8
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PROFIBUS-DP LTC2877 YES DFN-10, MSOP-10
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Industrial Communication Networks
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
n
RS485 and RS422 Systems
Technology Corporation. All other trademarks are the property of their respective owners.
n
3V Low Voltage Differential Signaling
Typical a T
Eye Diagram of 12Mbps Signal at
1.8V 5V
the Near and Far End of a 100m
5V
PROFIBUS Cable Driven by the
8
LTC2877 Using 2 1 PRBS Pattern
0.1F 1F
V
V
L
CC
LTC2877
390 390
PROFIBUS PBPA
RO
NEAR END
CABLE 2V/DIV
PB PB
B
RE
C
220 220
PA
SENSOR DI
A
PA
Z = 150
O
B A
FAR END
2V/DIV
390 390
DE
GND
28767 TA01b
20ns/DIV
28767 TA01a
28767fa
1
For more information www.linear.com/LTC2876
ion pplica
ions pplica
ion uresLTC2876/LTC2877
a T e Maxi Mu M r a T
(Notes 1, 2)
Supply Voltages (V , V ) ............................ 0.3V to 6V Operating Ambient Temperature Range (Note 3)
CC L
Logic Input Voltages (RE, DE, DI) ................ 0.3V to 6V LTC287xC ................................................ 0C to 70C
Line Interface I/O (PA, PB) .......................... 60V to 60V LTC287xI..............................................40C to 85C
Line Interface I/O Difference (PBPA) .....120V to 120V LTC287xH .......................................... 40C to 125C
Receiver Output (RO) Storage Temperature Range .................. 65C to 150C
LTC2876 ......................................0.3V to V + 0.3V Lead Temperature (Soldering, 10sec)....................300C
CC
LTC2877 ....................................... 0.3V to V + 0.3V
L
p c F T
LTC2876 LTC2876
TOP VIEW
TOP VIEW
RO 1 8 V
CC
RO 1 8 V
CC
RE 2 7 PA
RE 2 9 7 PA
9
DE 3 GND 6 PB
GND
DE 3 6 PB
5
DI 4 GND
DI 4 5 GND
MS8E PACKAGE
8-LEAD PLASTIC MSOP
DD PACKAGE
T = 150C, = 40C/W, = 10C/W
JMAX JA JC
8-LEAD (3mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
T = 150C, = 43C/W, = 5.5C/W
JMAX JA JC
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
LTC2877 LTC2877
TOP VIEW
TOP VIEW
RO 10 V
1
CC
RO 1 10 V
CC
RE 2 9 PA
RE 2 9 PA
11
11
DE 3 8 PB
DE 3 8 PB
GND
GND
DI 4 7 NC
DI 4 7 NC
V 5 6 GND
L
V 5 6 GND
L
MSE PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
T = 150C, = 40C/W, = 10C/W
JMAX JA JC
10-LEAD (3mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
T = 150C, = 43C/W, = 5.5C/W
JMAX JA JC
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
28767fa
2
For more information www.linear.com/LTC2876
ion igura on in
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