LTC2871IFE#PBF

Drivers, Receivers, Transceivers Overview

The LTC2871IFE#PBF is a multiprotocol transceiver supporting RS-232, RS-485, and RS-422 protocols. It operates on a single 3V to 5.5V supply voltage with a logic interface range of 1.7V to VCC. The device integrates one RS-485 transceiver and two independent RS-232 transceivers on dedicated I/O lines. It supports data rates up to 20Mbps for RS-485 and 500kbps for RS-232. An integrated DC/DC boost converter generates the required negative supply voltage using a small external inductor and capacitor. The component is housed in a 38-Lead Plastic TSSOP package.

Drivers, Receivers, Transceivers Feature Summary

• Pin-configurable multiprotocol support for RS-232, RS-485, and RS-422
• Integrated software-selectable termination resistors for RS-485 (120Ω) and RS-232 (5kΩ)
• Built-in half-duplex switching capability for RS-485 configurations
• Logic loopback mode for diagnostic self-testing

Drivers, Receivers, Transceivers Applications

• Point-of-sale terminals
• Cable repeaters
• Protocol translators

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Ensure the procurement channel provides valid traceability for Analog Devices Inc. components. Confirm that the received part matches the specified 38-Lead TSSOP form factor and electrical characteristics before integration into the design.

Drivers, Receivers, Transceivers Selection Notes

Select this model when independent control of two RS-232 channels and one RS-485 channel is required on dedicated lines. The LTC2871 differs from the LTC2870 by providing separate I/Os rather than shared pins. Consider the 38-pin TSSOP package constraints and verify that the application requires the –40°C to 85°C industrial temperature range covered by the 'I' suffix.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2870/LTC2871 family of robust pin-configurable multiprotocol transceivers. While the LTC2870 shares similar functionality, it utilizes shared I/O lines for its transceivers. The LTC2871 variant specifically offers independent control over its two RS-232 transceivers and one RS-485 transceiver, making it suitable for designs requiring distinct signal routing for each protocol.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2871CFE#PBF: Same function with commercial temperature range (0°C to 70°C).

Drivers, Receivers, Transceivers FAQ

How does the LTC2871 handle RS-485 termination?

It features pin-controlled integrated termination resistors that can be enabled or disabled via the TE485 input, eliminating the need for external resistors.

What is the maximum data rate supported by the RS-485 section?

The RS-485 transceiver supports a maximum data rate of 20Mbps.

Does the device require multiple power supplies for RS-232 operation?

No, an integrated DC/DC boost converter uses a tiny external inductor and capacitor to generate the necessary negative supply voltage from the single 3V to 5.5V main supply.