Interface RS485/RS422 Transceivers
Interface Extended Temperature (H & MP) Interface

LTM2881 - Complete Isolated RS485/RS422 μModule Transceiver + Power

LTC2856 - 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceiver

Features

  • 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

Typical Application

LTC2856-1 Typical Application
LTC2856-1 Typical Application

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 limiting 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 NUMBERMAX DATA RATE (Mbps)DUPLEXPACKAGE
LTC2856-1 20 Half MSOP-8, DFN-8
LTC2856-2 0.25 Half MSOP-8, DFN-8
LTC2857-1 20 Full MSOP-8, DFN-8
LTC2857-2 0.25 Full MSOP-8, DFN-8
LTC2858-1 20 Full MSOP-10, DFN-10
LTC2858-2 0.25 Full MSOP-10, DFN-10

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC2856CDD-1#PBF 3x3 DFN-8 DD C 05-08-1698 Yes
LTC2856CDD-1#TRPBF 3x3 DFN-8 DD C 05-08-1698 Yes
LTC2856CDD-2#PBF 3x3 DFN-8 DD C 05-08-1698 Yes
LTC2856CDD-2#TRPBF 3x3 DFN-8 DD C 05-08-1698 Yes
LTC2856CMS8-1#PBF MS-8 MS8 C 05-08-1660 Yes
LTC2856CMS8-1#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC2856CMS8-2#PBF MS-8 MS8 C 05-08-1660 Yes
LTC2856CMS8-2#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC2856HDD-1#PBF 3x3 DFN-8 DD H 05-08-1698 Yes
LTC2856HDD-1#TRPBF 3x3 DFN-8 DD H 05-08-1698 Yes
LTC2856HDD-2#PBF 3x3 DFN-8 DD H 05-08-1698 Yes
LTC2856HDD-2#TRPBF 3x3 DFN-8 DD H 05-08-1698 Yes
LTC2856HMS8-1#PBF MS-8 MS8 H 05-08-1660 Yes
LTC2856HMS8-1#TRPBF MS-8 MS8 H 05-08-1660 Yes
LTC2856HMS8-2#PBF MS-8 MS8 H 05-08-1660 Yes
LTC2856HMS8-2#TRPBF MS-8 MS8 H 05-08-1660 Yes
LTC2856IDD-1#PBF 3x3 DFN-8 DD I 05-08-1698 Yes
LTC2856IDD-1#TRPBF 3x3 DFN-8 DD I 05-08-1698 Yes
LTC2856IDD-2#PBF 3x3 DFN-8 DD I 05-08-1698 Yes
LTC2856IDD-2#TRPBF 3x3 DFN-8 DD I 05-08-1698 Yes
LTC2856IMS8-1#PBF MS-8 MS8 I 05-08-1660 Yes
LTC2856IMS8-1#TRPBF MS-8 MS8 I 05-08-1660 Yes
LTC2856IMS8-2#PBF MS-8 MS8 I 05-08-1660 Yes
LTC2856IMS8-2#TRPBF MS-8 MS8 I 05-08-1660 Yes


LTC2856-1 Package Drawing
LTC2856-1 Package Drawing
LTC2856-1 Package Drawing
LTC2856-1 Package Drawing
LTC2856-1 Package Drawing
LTC2856-1 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC2856CDD-1#PBF 3x3 DFN-8 C $2.07 $1.45 Yes
LTC2856CDD-1#TRPBF 3x3 DFN-8 C $1.51 Yes
LTC2856CDD-2#PBF 3x3 DFN-8 C $2.07 $1.45 Yes
LTC2856CDD-2#TRPBF 3x3 DFN-8 C $1.51 Yes
LTC2856CMS8-1#PBF MS-8 C $2.07 $1.45 Yes
LTC2856CMS8-1#TRPBF MS-8 C $1.51 Yes
LTC2856CMS8-2#PBF MS-8 C $2.07 $1.45 Yes
LTC2856CMS8-2#TRPBF MS-8 C $1.51 Yes
LTC2856HDD-1#PBF 3x3 DFN-8 H $2.80 $1.91 Yes
LTC2856HDD-1#TRPBF 3x3 DFN-8 H $1.97 Yes
LTC2856HDD-2#PBF 3x3 DFN-8 H $2.80 $1.91 Yes
LTC2856HDD-2#TRPBF 3x3 DFN-8 H $1.97 Yes
LTC2856HMS8-1#PBF MS-8 H $2.80 $1.91 Yes
LTC2856HMS8-1#TRPBF MS-8 H $1.97 Yes
LTC2856HMS8-2#PBF MS-8 H $2.80 $1.91 Yes
LTC2856HMS8-2#TRPBF MS-8 H $1.97 Yes
LTC2856IDD-1#PBF 3x3 DFN-8 I $2.48 $1.74 Yes
LTC2856IDD-1#TRPBF 3x3 DFN-8 I $1.80 Yes
LTC2856IDD-2#PBF 3x3 DFN-8 I $2.48 $1.74 Yes
LTC2856IDD-2#TRPBF 3x3 DFN-8 I $1.80 Yes
LTC2856IMS8-1#PBF MS-8 I $2.48 $1.74 Yes
LTC2856IMS8-1#TRPBF MS-8 I $1.80 Yes
LTC2856IMS8-2#PBF MS-8 I $2.48 $1.74 Yes
LTC2856IMS8-2#TRPBF MS-8 I $1.80 Yes
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Low Power RS485/RS422 Transceiver
  • Level Translator
  • Backplane Transceiver

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support