Interface RS485/RS422 Transceivers

LTM2881 - Complete Isolated RS485/RS422 μModule Transceiver + Power

LTC2861 - 20Mbps RS485 Transceivers with Integrated Switchable Termination

Features

  • Integrated, Logic-Selectable 120Ω Termination Resistor
  • 20Mbps Max Data Rate
  • No Damage or Latchup to ESD: ±15kV HBM
  • High Input Impedance Supports 256 Nodes
  • 250kbps Low-EMI Mode
  • Guaranteed Failsafe Receiver Operation Over the Entire Common Mode Range
  • Current Limited Drivers and Thermal Shutdown
  • Delayed Micropower Shutdown (5μA Max)
  • Power Up/Down Glitch-Free Driver Outputs
  • Low Operating Current (900μA Max in Receive Mode)
  • Meets All TIA/EIA-485-A Specifi cations
  • Available in 10-Pin 3mm × 3mm DFN, 12-Pin 4mm × 3mm DFN and 16-Pin SSOP Packages

Typical Application

LTC2861 Typical Application
LTC2861 Typical Application

Description

The LTC2859 and LTC2861 are low power, 20Mbps RS485/422 transceivers operating on 5V supplies. The receiver includes a logic-selectable 120Ω termination, one-eighth unit load supporting up to 256 nodes per bus, and a failsafe feature that guarantees a high output state under conditions of floating or shorted inputs.

The driver features a logic-selectable low-EMI 250kbps operating mode, and 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 a thermal shutdown.

Enhanced ESD protection allows the LTC2859 and LTC2861 to withstand ±15kV (human body model) on the transceiver interface pins without latchup or damage.

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
LTC2861CDE#PBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC2861CDE#TRPBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC2861CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC2861CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC2861IDE#PBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC2861IDE#TRPBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC2861IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC2861IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes


LTC2861 Package Drawing
LTC2861 Package Drawing
LTC2861 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
LTC2861CDE#PBF 4x3 DFN-12 C $2.48 $1.70 Yes
LTC2861CDE#TRPBF 4x3 DFN-12 C $1.76 Yes
LTC2861CGN#PBF SSOP-16 C $2.48 $1.70 Yes
LTC2861CGN#TRPBF SSOP-16 C $1.76 Yes
LTC2861IDE#PBF 4x3 DFN-12 I $2.98 $2.04 Yes
LTC2861IDE#TRPBF 4x3 DFN-12 I $2.10 Yes
LTC2861IGN#PBF SSOP-16 I $2.98 $2.04 Yes
LTC2861IGN#TRPBF SSOP-16 I $2.10 Yes
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* 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

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