The LTC2874 provides a rugged, 4-port IO-Link power and communications interface to remote devices connected by cables up to 20m in length. Output supply voltage and inrush current are ramped up in a controlled manner using external N-channel MOSFETs, providing improved robustness compared to fully integrated solutions. Wake-up pulse generation, line noise suppression, connection sensing and automatic restart after fault conditions are supported, along with signaling at 4.8kb/s, 38.4kb/s, and 230.4kb/s. Configuration and fault reporting are exchanged using a SPI-compatible 4-wire interface that operates at clock rates up to 20MHz. The LTC2874 implements an IO-Link master PHY. For IO-Link device designs, see the LT3669. Applications * IO-Link Masters * Intelligent Sensors and Actuators * Factory Automation Networks * IO-Link® Compatible (COM1/COM2/COM3)* 8V to 34V Operation* Hot Swap™ Controller Protected Supply Outputs* Discrete Power MOSFETs for Ruggedness and Flexibility* Configurable 100mA (4-Port), 200mA (2-Port), or 400mA (1-Port) CQ Drive Capability* Automatic Wake-Up Pulse Generation* Automatic Cable Sensing* CQ Pins Protected to ±50V* Configurable L+ Current Limit with Foldback* Short Circuit, Input UV/OV and Thermal Protection* Optional Interrupt and Auto-Retry after Faults* 2.9V to 5.5V Logic Supply for Flexible Digital Interface* No Damage or Latchup to ±8kV HBM ESD* 38-Lead (5mm × 7mm) QFN and TSSOP Packages https://elecena.pl/product/4498510/quad-io-link-master-hot-swap-controller-and-phy 2013-11-28 https://elecena.pl/product/4498510/quad-io-link-master-hot-swap-controller-and-phy 2014-07-11 https://elecena.pl/product/4498510/quad-io-link-master-hot-swap-controller-and-phy 2025-01-20