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LTC1535ISW#TR

Description
IC transceiver rs485 iso 28soic
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size163KB,4 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC1535ISW#TR Overview

IC transceiver rs485 iso 28soic

LTC1535ISW#TR Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP, SOP16/28,.4
Contacts28
Manufacturer packaging codeSW
Reach Compliance Codenot_compliant
ECCN codeEAR99
Differential outputYES
Number of drives1
Input propertiesDIFFERENTIAL SCHMITT TRIGGER
Interface integrated circuit typeLINE TRANSCEIVER
Interface standardsEIA-422; EIA-485
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length17.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Minimum output swing1.5 V
Maximum output low current0.004 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP16/28,.4
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)255
power supply5 V
Certification statusNot Qualified
Maximum receive delay855 ns
Number of receiver bits1
Maximum seat height2.65 mm
Maximum slew rate73 mA
Maximum supply voltage5.5 V
Minimum supply voltage4.5 V
Nominal supply voltage5 V
Supply voltage 1-max7.5 V
Mains voltage 1-minute4.5 V
Supply voltage1-Nom5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
maximum transmission delay1560 ns
width7.5 mm
DEMO MANUAL DC241B
LTC1535
Full Duplex, Isolated RS485
Transceiver with Slew Limiting
DESCRIPTION
Demonstration circuit 241B showcases the LTC
®
1535
isolated RS485 transceiver. The LTC1535 features 2,500V
isolation; the “left-half” of the chip contains familiar RS485
logic functions and an isolated switching converter, and
the “right-half” contains the RS485 transceiver. Both sides
include a communications section to send data back and
forth across the internal capacitive isolation barrier.
The LTC1535 allows the user to break ground loops that
cause problems in large systems, and it can also handle
high common mode swings relative to ground without
loss of data.
Isolation Considerations
The board, as constructed, is designed for 500V isolation,
limited by the CTX02-14659 transformer. A full 3750V UL
approvable transformer is also available from Coiltronics
as CTX02-14608. Note that the LTC1535 meets only a
2,500V test.
Logic Interface
The left-half of DC241B contains the logic interface sec-
tions. Large terminals are provided for +5V and logic ground
(V
CC1
and GND1). The input current is approximately
94mA. The smaller terminals connect to RO (receiver
output),
RE
(receiver enable), DE (driver enable), and DI
(driver input). The terminals are arranged to match the
LTC485 industry-standard pinout.
RS485 Interface
The right-hand side contains the isolated RS485 section.
The chip is designed for full duplex operation. So the
receiver input A-B and driver output Y-Z are brought out
to small terminals. The receiver also has a local output
RO2. Larger terminals V
CC2
and GND2 are powered from
the transformer, and require no external power. They
are included for the purpose of monitoring the isolated
converter output.
Other DC241B Features
Both sides have green LEDs (D1, D3) for monitoring the
presence of power. A 3.3k series resistor makes for dim
viewing, but conserves current. For accurate power supply
current measurement disable the LEDs with JP1 and JP3.
120Ω, 1/4W terminations are included. They are selected
with jumpers JP4 (receiver) and JP5 (driver).
Half-duplex operation is simplified by S1, which simply
shorts A to Y and B to Z. Half to the left, full to the right.
The driver slew rate is controlled by JP2; slow left and
fast right.
Terminal block J1 is the fastest way to graft DC241B into a
system. J1 requires a 2mm screw driver (Xcelite
®
P3321
recommended). Xcelite R181 won’t fit no matter how hard
you push.
Design files for this circuit board are available at
http://www.linear.com/demo
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
dc241bf
1

LTC1535ISW#TR Related Products

LTC1535ISW#TR LTC1535CSW#TR DC241B LTC1535ISW#PBF
Description IC transceiver rs485 iso 28soic IC transceiver rs485 iso 28soic board demo ltc1535csw IC transceiver rs485 iso 28soic
Brand Name Linear Technology Linear Technology - Linear Technology
Is it Rohs certified? incompatible incompatible - conform to
Maker Linear ( ADI ) Linear ( ADI ) - Linear ( ADI )
Parts packaging code SOIC SOIC - SOIC
package instruction SOP, SOP16/28,.4 SOP, SOP16/28,.4 - SOP, SOP28,.4
Contacts 28 28 - 28
Manufacturer packaging code SW SW - SW
Reach Compliance Code not_compliant _compli - compliant
ECCN code EAR99 EAR99 - EAR99
Differential output YES YES - YES
Number of drives 1 1 - 1
Input properties DIFFERENTIAL SCHMITT TRIGGER DIFFERENTIAL SCHMITT TRIGGER - DIFFERENTIAL SCHMITT TRIGGER
Interface integrated circuit type LINE TRANSCEIVER LINE TRANSCEIVER - LINE TRANSCEIVER
Interface standards EIA-422; EIA-485 EIA-422; EIA-485 - EIA-422; EIA-485
JESD-30 code R-PDSO-G16 R-PDSO-G16 - R-PDSO-G16
JESD-609 code e0 e0 - e3
length 17.9 mm 17.9 mm - 17.9 mm
Humidity sensitivity level 1 1 - 1
Number of functions 1 1 - 1
Number of terminals 16 16 - 16
Maximum operating temperature 85 °C 70 °C - 85 °C
Minimum output swing 1.5 V 1.5 V - 1.5 V
Maximum output low current 0.004 A 0.004 A - 0.004 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY
encapsulated code SOP SOP - SOP
Encapsulate equivalent code SOP16/28,.4 SOP16/28,.4 - SOP28,.4
Package shape RECTANGULAR RECTANGULAR - RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE - SMALL OUTLINE
Peak Reflow Temperature (Celsius) 255 255 - 260
power supply 5 V 5 V - 5 V
Certification status Not Qualified Not Qualified - Not Qualified
Maximum receive delay 855 ns 855 ns - 855 ns
Number of receiver bits 1 1 - 1
Maximum seat height 2.65 mm 2.65 mm - 2.65 mm
Maximum slew rate 73 mA 73 mA - 73 mA
Maximum supply voltage 5.5 V 5.5 V - 5.5 V
Minimum supply voltage 4.5 V 4.5 V - 4.5 V
Nominal supply voltage 5 V 5 V - 5 V
Supply voltage 1-max 7.5 V 7.5 V - 7.5 V
Mains voltage 1-minute 4.5 V 4.5 V - 4.5 V
Supply voltage1-Nom 5 V 5 V - 5 V
surface mount YES YES - YES
technology CMOS CMOS - CMOS
Temperature level INDUSTRIAL COMMERCIAL - INDUSTRIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) - Matte Tin (Sn)
Terminal form GULL WING GULL WING - GULL WING
Terminal pitch 1.27 mm 1.27 mm - 1.27 mm
Terminal location DUAL DUAL - DUAL
Maximum time at peak reflow temperature 40 40 - 30
maximum transmission delay 1560 ns 1560 ns - 1560 ns
width 7.5 mm 7.5 mm - 7.5 mm
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