LTC1484CMS8#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1484CMS8#TRPBF is a low power RS-485 transceiver in an 8-lead MSOP package. It operates on a single 5V supply with a common mode range of –7V to 12V. The device supports data rates up to 5Mbps and includes receiver fail-safe for floating or shorted inputs. Supply current is 900µA max with the driver enabled and 700µA max when disabled. Shutdown current is 20µA max. It features enhanced ESD protection rated at –15kV (HBM) and thermal shutdown circuitry.

Drivers, Receivers, Transceivers Feature Summary

• Guarantees a high receiver output state when inputs are open, shorted, or terminated without signal.
• Provides enhanced ESD protection on A and B pins meeting IEC-1000-4-2 Level 4 contact and Level 3 air discharge specifications.
• Includes thermal shutdown circuitry that forces driver outputs to high impedance during excessive power dissipation.

Drivers, Receivers, Transceivers Applications

• Battery-powered RS-485/RS-422 communication systems
• Carrier Detect Multiple Access (CDMA) networks
• Level translation interfaces

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging upon order confirmation. Confirm the 'C' grade designation aligns with the required commercial temperature range of 0°C to 70°C. Ensure the 8-lead MSOP footprint matches the PCB layout constraints before finalizing procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring low quiescent current and robust fault protection. The integrated fail-safe feature eliminates the need for external pull-up resistors in many configurations. Verify that the 5V supply voltage and 5Mbps maximum data rate meet the system requirements.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC1484 family of low power RS-485 transceivers. It is pin-compatible with the LTC485. Other variants include industrial temperature grades (LTC1484I) and different package options such as PDIP and SOIC.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC485 is a pin-compatible alternative within the same product family. Verify that the replacement variant meets the specific temperature range and packaging requirements of the original design.

Drivers, Receivers, Transceivers FAQ

How does the receiver fail-safe mechanism function?

It guarantees a high receiver output state when the inputs are left open, shorted together, or terminated with no signal present, without requiring external components.

What is the ESD protection rating for the A and B pins?

The A and B pins withstand –15kV using the Human Body Model, IEC-1000-4-2 Level 4 (–8kV) contact, and Level 3 (–8kV) air discharge specifications.

What triggers the thermal shutdown circuit?

The thermal shutdown circuit activates if the die temperature rises above 150°C due to prolonged shorts, forcing the driver outputs into a high impedance state until the temperature cools to approximately 130°C.