Dual Isolated RS232 μModule Transceiver + Power

The LTM2882 is a complete galvanically isolated dual RS232 μModule® (micromodule) 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 latch-up or damage.

Applications

* Isolated RS232 Interface

* Industrial Communication

* Test and Measurement Equipment

* Breaking RS232 Ground Loops

* RS232 Transceiver: 2500VRMS for 1 Minute

* UL-CSA Recognized File #E151738

* CSA Component Acceptance Notice 5A

* 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