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LTC1686IS8#PBF

Description
IC TXRX RS485 PREC DELAY 8-SOIC
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size177KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC1686IS8#PBF Overview

IC TXRX RS485 PREC DELAY 8-SOIC

LTC1686IS8#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP, SOP8,.25
Contacts8
Manufacturer packaging codeS8
Reach Compliance Codecompliant
ECCN codeEAR99
Differential outputYES
Number of drives1
High level input current maximum value0.000001 A
Input propertiesDIFFERENTIAL SCHMITT TRIGGER
Interface integrated circuit typeLINE TRANSCEIVER
Interface standardsEIA-422; EIA-485
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
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 codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
power supply5 V
Certification statusNot Qualified
Maximum receive delay25 ns
Number of receiver bits1
Maximum seat height1.75 mm
Maximum slew rate12 mA
Maximum supply voltage5.25 V
Minimum supply voltage4.75 V
Nominal supply voltage5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
maximum transmission delay25 ns
width3.9 mm
Base Number Matches1
LTC1686/LTC1687
52Mbps Precision Delay
RS485 Fail-Safe Transceivers
FEATURES
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DESCRIPTION
The LTC
®
1686/LTC1687 are high speed, precision delay,
full-duplex RS485 transceivers that can operate at data
rates as high as 52Mbps. The devices also meet the
requirements of RS422.
A unique architecture provides very stable propagation
delays and low skew over a wide common mode and
ambient temperature range.
The driver and receiver feature three-state outputs, with
disabled driver outputs maintaining high impedance over
the entire common mode range. A short-circuit feature
detects shorted outputs and substantially reduces driver
output current. A similar feature also protects the receiver
output from short circuits. Thermal shutdown circuitry
protects from excessive power dissipation.
The receiver has a fail-safe feature that guarantees a high
output state when the inputs are shorted or are left floating.
The LTC1686/LTC1687 RS485 transceivers guarantee
receiver fail-safe operation over the
entire
common mode
range (– 7V to 12V). Receiver input resistance remains
22k when the device is unpowered or disabled.
The LTC1686/LTC1687 operate from a single 5V supply
and draw only 7mA of supply current.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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Precision Propagation Delay Over Temperature:
Receiver/Driver: 18.5ns
±
3.5ns
High Data Rate:
52Mbps
Low t
PLH
/t
PHL
Skew:
Receiver/Driver: 500ps Typ
–7V to 12V RS485 Input Common Mode Range
Guaranteed Fail-Safe Operation Over the Entire
Common Mode Range
High Input Resistance:
22k, Even When Unpowered
Short-Circuit Protected
Thermal Shutdown Protected
Driver Maintains High Impedance in Three-State or
with Power Off
Single 5V Supply
Pin Compatible with LTC490/LTC491
45dB CMRR at 26MHz
APPLICATIONS
s
s
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High Speed RS485/RS422 Full Duplex Transceivers
Level Translator
Backplane Transceiver
STS-1/OC-1 Data Transceiver
Signal Repeaters
TYPICAL APPLICATION
LTC1686
5
D
3
DRIVER
100Ω
6
100Ω
RECEIVER
R
LTC1686
2V/DIV
1V/DIV
8
R
2
RECEIVER
100Ω
7
100Ω
DRIVER
D
5V/DIV
RECEIVER
OUTPUT
400 FT OF CATEGORY 5 UTP
100ns/DIV
1686/87 TA02
LTC1686/87 • TA01
U
U
U
10Mbps Data Pulse
400 Feet Category 5 UTP
DRIVER INPUT
CABLE DELAY
RECEIVER
INPUT
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