LTM2882 - Dual Isolated RS232 μModule Transceiver + Power

Features

  • UL Rated Dual RS232 Transceiver: 2500VRMS UL Recognized ® File #E15178
  • Isolated DC Power: 5V at Up to 200mA
  • No External Components Required
  • 1.62V to 5.5V Logic Supply for Flexible Digital Interfacing
  • High Speed Operation
    1Mbps for 250pF/3kΩ Load
    250kbps for 1nF/3kΩ Load
    100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load
  • 3.3V (LTM2882-3) or 5V (LTM2882-5) Operation
  • No Damage or Latchup to ±10kV HBM ESD on Isolated RS232 Interface or Across Isolation Barrier
  • High Common Mode Transient Immunity: 30kV/μs
  • Common Mode Working Voltage: 560VPEAK
  • True RS232 Compliant Output Levels
  • Low Profile (15mm × 11.25mm) Surface Mount BGA and LGA Packages

Typical Application

LTM2882 Typical Application
LTM2882 Typical Application

Description

The LTM®2882 is a complete galvanically isolated dual RS232 μModule® transceiver. No external components are required. A single 3.3V or 5V supply powers both sides of the interface through an integrated, isolated DC/DC converter. A logic supply pin allows easy interfacing with different logic levels from 1.62V to 5.5V, independent of the main supply.

Coupled inductors and an isolation power transformer provide 2500VRMS of isolation between the line transceiver and the logic interface. This device is ideal for systems with different grounds, allowing for large common mode voltages. Uninterrupted communication is guaranteed for common mode transients greater than 30kV/μs.

This part is compatible with the TIA/EIA-232-F standard. Driver outputs are protected from overload and can be shorted to ground or up to ±15V without damage. An auxiliary isolated digital channel is available. This channel allows configuration for half-duplex operation by controlling the DE pin.

Enhanced ESD protection allows this part to withstand up to ±10kV (human body model) on the transceiver interface pins to isolated supplies and across the isolation barrier to logic supplies without latchup or damage.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprint compatible with Mentor Graphics PADS® v9.5 or later, and Cadence ORCAD® v16.5 or later.

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

15mm x 11.25mm x 2.8mm LGA, 15mm x 11.25mm x 3.42mm BGA

LTM2882 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTM2882CV-3#PBF LGA 32 C $12.07 $8.45 View
LTM2882CV-5#PBF LGA 32 C $12.07 $8.45 View
LTM2882CY-3#PBF BGA 32 C $12.07 $8.45 View
LTM2882CY-5#PBF BGA 32 C $12.07 $8.45 View
LTM2882HY-3#PBF BGA 32 H $17.09 $11.97 View
LTM2882HY-5#PBF BGA 32 H $17.09 $11.97 View
LTM2882IV-3#PBF LGA 32 I $14.24 $9.97 View
LTM2882IV-5#PBF LGA 32 I $14.24 $9.97 View
LTM2882IY-3#PBF BGA 32 I $14.24 $9.97 View
LTM2882IY-5#PBF BGA 32 I $14.24 $9.97 View
LTM2882MPY-3#PBF BGA 32 MP $30.18 $21.13 View
LTM2882MPY-5#PBF BGA 32 MP $30.18 $21.13 View
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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.

Part Number Description Price Documentation
DC1554A-A LTM2882-3 RS232 uModule Isolator Demo Board (3.3V Supply). $50.00
DC1554A-B LTM2882-5 RS232 uModule Isolator Demo Board (5.0V Supply). $50.00
DC1747A-A LTM2882-3 low EMI test board (for EMI evaluation purposes only, no VL & no GPIO). $50.00
DC1747A-B LTM2882-5 low EMI test board (for EMI evaluation purposes only, no VL & no GPIO). $50.00
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Click here to view our complete list of demo boards

Applications

  • Isolated RS232 Interface
  • Industrial Communication
  • Test and Measurement Equipment
  • Breaking RS232 Ground Loops

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Design Tools

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