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LTC2857IDD-2#TRPBF

Description
RS-422/RS-485 Interface IC 5V Full-Duplex 250kbps RS485 Transceiver
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size304KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LTC2857IDD-2#TRPBF Overview

RS-422/RS-485 Interface IC 5V Full-Duplex 250kbps RS485 Transceiver

LTC2857IDD-2#TRPBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionHVSON,
Contacts8
Manufacturer packaging code05-08-1698
Reach Compliance Codecompliant
Differential outputYES
Number of drives1
Input propertiesDIFFERENTIAL SCHMITT TRIGGER
Interface integrated circuit typeLINE TRANSCEIVER
Interface standardsEIA-485-A; TIA-485-A; EIA-422
JESD-30 codeS-PDSO-N8
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum receive delay70 ns
Number of receiver bits1
Maximum seat height0.8 mm
Maximum supply voltage5.5 V
Minimum supply voltage4.5 V
Nominal supply voltage5 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
maximum transmission delay1500 ns
width3 mm
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
20Mbps and Slew Rate Limited
15kV RS485/RS422 Transceivers
FEATURES
n
n
n
DESCRIPTION
The
LTC
®
2856-1,
LTC2856-2, LTC2857-1, LTC2857-2,
LTC2858-1 and LTC2858-2 are low power, RS485/RS422
transceivers operating on 5V supplies at maximum data
rates of 20Mbps or 250kbps for low EMI. The receiver has
a one-eighth unit load, supporting up to 256 nodes per bus
(C, I-Grade), and a failsafe feature that guarantees a high
output state under conditions of floating or shorted inputs.
The driver maintains a high output impedance over the
entire common mode range when disabled or when the
supply is removed. Excessive power dissipation caused
by bus contention or a fault is prevented by current limit-
ing all outputs and by thermal shutdown.
Enhanced ESD protection allows these parts to withstand
±15kV (human body model) on the transceiver interface
pins without latchup or damage.
PART
NUMBER
LTC2856-1
LTC2856-2
LTC2857-1
LTC2857-2
LTC2858-1
LTC2858-2
MAX DATA
RATE (Mbps)
20
0.25
20
0.25
20
0.25
DUPLEX
Half
Half
Full
Full
Full
Full
PACKAGE
MSOP-8, DFN-8
MSOP-8, DFN-8
MSOP-8, DFN-8
MSOP-8, DFN-8
MSOP-10, DFN-10
MSOP-10, DFN-10
n
n
n
n
n
n
n
n
20Mbps or Low EMI 250kbps Maximum Data Rate
No Damage or Latchup to ESD: ±15kV HBM
High Input Impedance Supports 256 Nodes
(C, I-Grade)
Operation Up to 125°C (H-Grade)
Guaranteed Failsafe Receiver Operation Over the
Entire Common Mode Range
Current Limited Drivers and Thermal Shutdown
Delayed Micropower Shutdown: 5µA Maximum
(C, I-Grade)
Power Up/Down Glitch-Free Driver Outputs
Low Operating Current: 900µA Maximum in Receive
Mode
Compatible with TIA/EIA-485-A Specifications
Available in 8-Lead and 10-Lead 3mm
×
3mm DFN
and 8-Lead and 10-Lead MSOP Packages
APPLICATIONS
n
n
n
Low Power RS485/RS422 Transceiver
Level Translator
Backplane Transceiver
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of
Analog Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
LTC2856-1
RO1
RE1
DE1
DI1
D
GND1
2V/DIV
R
V
CC1
R
T
LTC2858-1 at 20Mbps
DI
Y
Z
LTC2856-1
RO2
RE2
DE2
DI2
D
GND2
285678 TA01a
R
V
CC2
R
T
Y-Z
20ns/DIV
2856 TA01b
285678fg
For more information
www.linear.com/LTC2856-1
1
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