LTC2874IFE#PBF

Drivers, Receivers, Transceivers Overview

The LTC2874IFE#PBF is a quad-port IO-Link master Hot Swap controller and PHY in a 38-lead TSSOP package. It operates with an input supply voltage range of 8V to 34V and a logic supply of 2.9V to 5.5V. The device provides four independent ports, each capable of sourcing up to 100mA (configurable to 200mA or 400mA total). It supports signaling rates of 4.8kb/s, 38.4kb/s, and 230.4kb/s via CQ lines protected to ±50V. Communication with the host is handled through a SPI-compatible interface operating at clock rates up to 20MHz.

Drivers, Receivers, Transceivers Feature Summary

• Integrated Hot Swap controller utilizing external N-channel MOSFETs for controlled power ramping and ruggedness
• Supports IO-Link COM1, COM2, and COM3 communication standards with automatic wake-up pulse generation
• Includes configurable current limiting with foldback protection and automatic restart capabilities after fault conditions

Drivers, Receivers, Transceivers Applications

• IO-Link Master systems
• Intelligent sensors and actuators
• Factory automation networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and tube packaging when ordering. Confirm that the FE package designation matches the required 38-lead TSSOP form factor. Ensure the industrial temperature grade (-40°C to 85°C) meets the operational requirements of the target environment before finalizing procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring a rugged IO-Link master interface with discrete power switching. The use of external MOSFETs allows for customized inrush control and improved fault tolerance compared to fully integrated solutions. Consider the available drive configurations (100mA/200mA/400mA) when sizing the external components for the specific load requirements.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2874 family of IO-Link master controllers. It is designed to work alongside remote devices such as the LT3669. The device integrates the physical layer signaling with power management features, simplifying the design of multi-port industrial communication hubs by combining control logic with high-voltage tolerant interfaces.

Drivers, Receivers, Transceivers Replacement Considerations

LT3474IFE#PBF

Drivers, Receivers, Transceivers FAQ

How does the LTC2874 handle overcurrent faults on the L+ outputs?

The device uses external sense resistors connected between SENSE+ and SENSE– pins to set individual port current limits. If an overcurrent condition persists beyond a programmable timeout, the GATE pin pulls down to turn off the external MOSFET, triggering an interrupt.

What is the maximum voltage tolerance for the CQ communication pins?

The CQ pins are protected to withstand voltages from VDD minus 50V up to +50V relative to ground, ensuring robustness against abusive cable conditions.

Can the LTC2874 operate without a microcontroller?

While it includes standalone features like auto-retry, full configuration and monitoring typically require a host microcontroller via the SPI interface. Unused digital inputs should be tied to VL or GND as specified.