Ultra Rugged ±60V RS485 Transceivers

Ultra Rugged ±60V RS485 Transceivers
Run Full RS485 Levels at Up to 20Mbps with 3.3V or 5V Operation
The LTC®2862–LTC2865 is a family of exceptionally rugged, high voltage tolerant RS485/RS422 transceivers that helps eliminate
field failures without the need of costly external protection devices. ±60V overvoltage fault protection on the data transmission
lines protects bus pins during operation and power shutdown, while an extended ±25V input common mode range and full failsafe
operation improve data communications reliability in electrically noisy environments and in the presence of ground loop voltages.
Enhanced ESD protection allows these devices to withstand ±15kV (HBM and IEC-1000-4-2 air discharge) on the transceiver pins
without latchup or damage; all other pins are protected to ±8kV HBM.
LTC2865 Receiving 10Mbps ±200mV Signal
with 1MHz ±25V Common Mode Sweep
Features
Protected from Overvoltage Line Faults to ±60V
n
3V to 5.5V Supply Voltage
20Mbps or Low EMI 250kbps Data Rate
±15kV ESD Interface Pins, ±8kV All Other Pins
Extended Common Mode Range: ±25V
Guaranteed Failsafe Receiver Operation
Supports up to 256 Nodes
Separate 1.65V to 5.5V Logic Supply Pin (LTC2865)
Temperature Range: –55°C to 125°C
n
A, B
20V/DIV
A
n
B
n
n
RO
n
n
RO
2V/DIV
n
n
100ns/DIV
Part Number
Max Data Rate
Duplex
SHDN
Comments
Package
LTC2862-1/-2
20Mbps/250kbps
Half
Yes
Pin-Compatible with LT 1785A
®
SO-8, 3 x 3 DFN-8
LTC2863-1/-2
20Mbps/250kbps
Full
No
Pin-Compatible with LTC490
SO-8, 3 x 3 DFN-8
LTC2864-1/-2
20Mbps/250kbps
Full
Yes
Pin-Compatible with LT1791A
SO-14, 3 x 3 DFN-10
LTC2865
20Mbps/250kbps
Full
Yes
Logic Supply Pin, SLO Pin
MSOP-12, 4 x 3 DFN-12
L, LT, LTC, LTM, Linear Technology and the Linear logo are
registered trademarks and Hot Swap is a trademark of Linear
Technology Corporation. All other trademarks are the property of
their respective owners.
Linear Technology RS485/RS422 Transceivers
Part Number
Supply
Max Data
ESD
(V)
Rate (Bits/s) # Dr # Rec Duplex SHDN (kV) Failsafe Comments
Temp
Grade
Package
2500VRMS Isolation
LTM®2881-3/-5
LTC1535
3.3/5
20M
1
1
Full
Yes
±15
Type 2
C, I, H, MP
Type 2
No External Components
Required, Isolated 1W DC/DC
Converter, Switchable, 120Ω
Termination, UL File #E151738
UL File #E151738
5
250k
1
1
Full
No
±8
Pin-Compatible with LT1785A
C, I, H, MP
C, I
15 × 11.25 × 2.8 LGA,
15 × 11.25 × 3.4 BGA
SO(W)-28
±60V Fault Protection
LTC2862-1/-2
3 to 5.5
20M/250k
1
1
Half
Yes
±15
Type 2
LTC2863-1/-2
3 to 5.5
20M/250k
1
1
Full
No
±15
Type 2
LTC2864-1/-2
3 to 5.5
20M/250k
1
1
Full
Yes
±15
Type 2
LTC2865
3 to 5.5
20M/250k
1
1
Full
Yes
±15
Type 2
Logic Supply Pin, SLO Pin
C, I, H
LT1785A
5
250k
1
1
Half
Yes
±15
Type 2
Pin-Compatible with LTC485
C, I, H
SO-8, DIP-8
LT1791A
5
250k
1
1
Full
Yes
±15
Type 2
Pin-Compatible with LTC491
C, I, H
SO-14, DIP-14
3 × 3 DFN-10
Pin-Compatible with LT1791A
SO-8, 3 × 3 DFN-8
C, I, H, MP
SO-8, 3 × 3 DFN-8
C, I, H, MP
SO-14, 3 × 3 DFN-10
MSOP-12, 4 × 3 DFN-12
Integrated Switchable 120Ω Termination
LTC2854
3.3
20M
1
1
Half
Yes
±25
Type 2
Low Power
C, I, H
LTC2859
5
20M/250k
1
1
Half
Yes
±15
Type 2
Slew Rate Control, Low Power
C, I, H
3 × 3 DFN-10
LTC2855
3.3
20M
1
1
Full
Yes
±15
Type 2
Low Power
C, I, H
4 × 3 DFN-12, SSOP-16
LTC2861
5
20M/250k
1
1
Full
Yes
±15
Type 2
Slew Rate Control, Low Power
C, I
4 × 3 DFN-12, SSOP-16
3.3V Supply Operation
LTC2850
3.3
20M
1
1
Half
Yes
±15
Type 2
Low Power
C, I, H
LTC2851
3.3
20M
1
1
Full
No
±15
Type 2
Low Power
C, I, H
SO-8, MSOP-8, 3 × 3 DFN-8
LTC2852
3.3
20M
1
1
Full
Yes
±15
Type 2
DE and RE Pins, Low Power
C, I, H
SO-14, MSOP-10, 3 × 3 DFN-10
LTC1480
3.3
2.5M
1
1
Half
Yes
±3.5
Type 1
Low Power
LTC2856-1/-2
5
20M/250k
1
1
Half
Yes
±15
Type 2
Hot Swap™ Capable
C, I, H
LTC2857-1/-2
5
20M/250k
1
1
Full
No
±15
Type 2
Hot Swap Capable
C, I, H
MSOP-8, 3 × 3 DFN-8
LTC2858-1/-2
5
20M/250k
1
1
Full
Yes
±15
Type 2
Hot Swap Capable
C, I, H
MSOP-10, 3 × 3 DFN-10
LTC1690
5
5M
1
1
Full
No
±15
Type 2
C, I
LTC1481
5
2.5M
1
1
Half
Yes
±10
Type 1
C, I
SO-8, DIP-8
LTC1482
5
4M
1
1
Half
Yes
±15
Type 2
Carrier Detect
C, I
MSOP-8, SO-8, DIP-8
Low EMI
C, I
SO-8, DIP-8
C, I
MSOP-8, SO-8, DIP-8
C, I
SO-8, MSOP-8, 3 × 3 DFN-8
SO-8, DIP- 8
Low Power
LTC1483
5
150k
1
1
Half
Yes
±10
Type 1
LTC1484
5
4M
1
1
Half
Yes
±15
Type 2
LTC1485
5
10M
1
1
Half
No
±10
Type 1
LTC1487
5
250k
1
1
Half
Yes
±10
Type 1
Low EMI
MSOP-8, 3 × 3 DFN-8
MSOP-8, SO-8, DIP-8
C, I
SO-8, DIP-8
C
SO-8, DIP-8
LTC485
5
2.5M
1
1
Half
No
±4
Type 1
C, I, M
LTC490
5
2.5M
1
1
Full
No
±10
Type 1
C, I
SO-8, DIP-8
LTC491
5
2.5M
1
1
Full
No
±10
Type 1
C, I
SO-14, DIP-14
DE and RE Pins
SO-8, DIP-8, CERDIP-8
High Speed
LTC1685
5
52M
1
1
Half
No
±4
Type 2
C, I
SO-8
LTC1686
5
52M
1
1
Full
No
±4
Type 1
C, I
SO-8
LTC1687
5
52M
1
1
Full
No
±4
Type 1
DE and RE Pins
C, I
SO-14
Hot Swap Capable, 1/2 DE Pins
C, I
SO-16
Low Power, 1/2 DE Pins
C, I
SO(W)-16, DIP-16
Quad Drivers and Receivers
LTC1688/89
5
100M
4
0
No
±4
LTC486/87
5
10M
4
0
No
±4
Type 1
LTC1518/19
5
52M
0
4
No
±4
Type 2
LTC488/89
5
10M
0
4
No
±10
Type 1
LTC1520
5
50M
0
4
No
±4
1/2 DE Pins
High Speed, LVDS-Compatible
C, I
SO-16
C, I
SO(W)-16, DIP-16
C
SO-16
RS232/RS485 Multiprotocol
LTC2870
3 to 5.5
20M/500k
1
1
Both
Yes
±26
Type 2
Two RS232 Transceivers
C, I
4 × 5 QFN-28, TSSOP-28
LTC2871
3 to 5.5
20M/500k
1
1
Both
Yes
±16
Type 2
Two RS232 Transceivers
C, I
5 × 7 QFN-38, TSSOP-38
LTC2872
3 to 5.5
20M/500k
2
2
Both
Yes
±16
Type 2
Four RS232 Transceivers
C, I
5 × 7 QFN-38
Type 1 = Open; Type 2 = Idle, Open, Short
www.linear.com/2865 n 1-800-4-LINEAR
0313C