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LTC1387CSW#PBF

Description
Single Transmitter/Receiver RS-232/RS-485 20-Pin SOIC W Tube
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size184KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LTC1387CSW#PBF Overview

Single Transmitter/Receiver RS-232/RS-485 20-Pin SOIC W Tube

LTC1387CSW#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionSOP,
Contacts20
Manufacturer packaging code05-08-1620 (SW20)
Reach Compliance Codecompliant
Is SamacsysN
Differential outputYES
Number of drives1
Input propertiesDIFFERENTIAL SCHMITT TRIGGER
Interface integrated circuit typeLINE TRANSCEIVER
Interface standardsEIA-232; EIA-422; EIA-485; EIA-562
JESD-30 codeR-PDSO-G20
JESD-609 codee3
length12.8 mm
Humidity sensitivity level1
Number of functions1
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum receive delay6000 ns
Number of receiver bits1
Maximum seat height2.65 mm
Maximum supply voltage5.25 V
Minimum supply voltage4.75 V
Nominal supply voltage5 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
maximum transmission delay4000 ns
width7.5 mm
Base Number Matches1
LTC1387
Single 5V RS232/RS485
Multiprotocol Transceiver
FEATURES
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
Two RS232 Transceivers or One RS485 Transceiver
Operates from a Single 5V Supply
Guaranteed Receiver Output with Inputs
Floating or Shorted to Ground
Logic Selectable Fast/Slow RS485 Driver Slew Rate
Low Supply Current: 7mA Typical
5µA Supply Current in Shutdown
Self-Testing Capability in Loopback Mode
Separate Driver and Receiver Enable Controls
Driver Maintains High Impedance in Three-State,
Shutdown or with Power Off
Receiver Inputs Can Withstand
±25V
The LTC
®
1387 is a low power reconfigurable CMOS bidi-
rectional transceiver. It can be configured as an RS485
differential port or as two RS232 single-ended ports. An
onboard charge pump uses four 0.1µF capacitors to
generate boosted positive and negative supplies, allowing
the RS232 drivers to meet
±5V
output swing require-
ments with only a single 5V supply. A shutdown mode
reduces the I
CC
supply current to 5µA.
The RS232 transceivers are in full compliance with RS232
specification. The RS485 transceiver is in full compliance
with RS485 and RS422 specifications. The RS485 re-
ceiver assumes a known output state when the inputs are
floating or shorted to ground. All interface drivers feature
short-circuit and thermal shutdown protection. An enable
pin allows RS485 driver outputs to be forced into high
impedance which is maintained even when the outputs are
forced beyond supply rails or the power is off. A loop back
mode allows the driver outputs to be connected back to the
receiver inputs for diagnostic self-test.
The LTC1387 is available in 20-pin plastic SSOP and SW
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIONS
s
s
s
s
s
Point-of-Sale Terminals
Software Selectable Multiprotocol Interface Ports
Low Power RS485/RS422/RS232/EIA562 Interface
Cable Repeaters
Level Translators
TYPICAL APPLICATI
2
3
1 20
LTC1387
19
V
CC1
5V
18
RECOUT
17
4
5
120Ω
6
7
8
13
10
RS485 INTERFACE
120Ω
4
5
6
7
8
13
10
DR IN
SLEW
DR ENABLE
5V
15
14
9
12
11
4000-FT 24-GAUGE TWISTED PAIR
5V
5V
5V
5V
ALL CAPACITORS: 0.1µF MONOLITHIC CERAMIC TYPE
LTC1387 • TA01
U
19
20 1
LTC1387
2
3
18
V
CC2
5V
17
RECOUT
15
14
9
12
11
DR IN
SLEW
DR ENABLE
5V
UO
U
1
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