End-to-End IO-Link Solutions High Current Device 4-Port Master 24V VDD BUCK 3.3V VL LTC2874 LT3669-2 HOT SWAP LDO 300mA 150mA µC L+ CQ1 CQ1 GND GND µC µC µC SENSOR L+1 Q2 ILLM L+4 CQ4 PORT4 IO-Link™ defines standardized connectors, cables and protocol to simplify smart sensor/actuator communications. The LTC®2874 and LT®3669 interfaces guard against inrush currents, sparks, noise, and ESD events commonly found in harsh industrial environments where IO-Link systems reside. The LTC2874 quad master integrates a Hot Swap™ controller on each port, reducing board space, design complexity and costs while increasing reliability for multiport masters. The LT3669 integrates line drivers, a 100mA buck regulator (300mA for LT3669-2) and a 150mA LDO to provide all the power required for the internal electronics in a sensor or actuator. LTC2874 Features LT3669 Features • IO-Link PHY Compatible (COM1/COM2/COM3) • IO-Link PHY Compatible (COM1/COM2/COM3) • Hot Swap Protected Supply Outputs • Cable Interface Protected to ±60V • 8V to 34V Operation • 7.5V to 40V Operation • Configurable CQ Drive Capability • Integrated 100mA/300mA(-2) Step-Down Switching Regulator and 150mA LDO Linear Regulator • Automatic Wake-Up Pulse Generation (WURQ) • Cable Interface Protected to ±50V (CQ), 50V (L+) • Configurable L+ Current Limit with Foldback • 4-Wire SPI-Compatible Serial Interface • 2.9V to 5.5V Logic Supply • ±8kV HBM ESD • 38-Lead (5mm x 7mm) QFN and TSSOP Packages Info & Free Samples www.linear.com/product/LTC2874 www.linear.com/product/LT3669 1-800-4-LINEAR 8-Port IO-Link Master Reference Design (DC2228) • Rugged Line Drivers with Adjustable Slew Rate and Current Limit • Adaptive Line Driver Pulsing Scheme to Switch Heavy Loads Safely • Drivers Configurable as Push-Pull, Pull-Up or Pull-Down • WURQ Pulse Detection • Adjustable Power-On Reset Timer , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. IO-Link is a registered trademark of PROFIBUS User Organization (PNO). All other trademarks are the property of their respective owners.